HYDROLOGIC DATA REPORT VOLUME II - SURFACE WATER AND STREAMFLOW DATA WATER YEAR 2020 New River Fire Streamgage, along Table Mesa Road about 3 miles east of I-17 (photo date: November 26, 2019) PREFACE This publication presents the surface water data collected by the Flood Control District of Maricopa County's automated water-level gage network. This telemetered network is located primarily throughout Maricopa County, Arizona with additional gages in Yavapai, Pinal, Yuma, and La Paz Counties. This is the 27th annual water data report published by the District. Annual reports are available for Water Years 1994 – 2020. The surface water data contained in this report were collected, compiled and edited by the Flood Warning Branch of the Flood Control District. Data include mean daily, total, maximum, and minimum discharges at the flow sites; mean daily, maximum, and minimum pool levels at the storage locations; and mean daily, maximum, and minimum volumes stored at the storage locations. Additional graphics are provided for the user to help put the data in context with historic records at the gage. Flood flow frequency data are computed for stations with sufficient record (> 11 years of non-zero flow.) Disclaimers: 1. Flood flow frequency graphics, whether computed in-house or cited from FEMA floodplain studies, are provided for informational purposes only and should not be considered for regulatory purposes. 2. The information contained herein is as accurate and complete as possible within the limitations of real-time data collection technology currently available. Wherever possible, notes have been included to identify questionable data. Reliance upon the accuracy, reliability, and authority of this information is solely the responsibility of the user. 3. Mention of any products, companies, or specific brand names in this report does not constitute endorsement of those companies or products. Revisions to any of these data for any reason will be published in the following years’ reports in an appendix to the report. Printed copies of this report may be requested and purchased from: Flood Control District of Maricopa County 2801 W. Durango Street Phoenix, Arizona 85009 (602) 506-8701 Or downloaded from: https://www.maricopa.gov/759/Publications ii TABLE OF CONTENTS Preface …………………………………………………………………………………….. ii Introduction ……………………………………………..……………………………… iv Data Collection ……………………………………………………………………….. v Definition of Terms …………………………………………………………………. ix – xii Station Location Map ………………………………………………………………. xiii New Installations in Water Year 2020 …………………………………….. xiv Station Table ………………………………………………………………………….. xv – xix Summary of Significant Streamflow ……………………………………….. xx Station Data Pages …………………………………………………………………. 1 - 963 iii INTRODUCTION The Flood Control District of Maricopa County (FCDMC or District) collects a large amount of data pertaining to surface water runoff in and around Maricopa County. Stations report data to the main database at least 2 times daily, even if the data is zero (no flow.) During runoff events, data are transmitted to the database more frequently, as water levels rise and fall. The District has changed the stations’ data transmit protocol from ALERT1 to ALERT2. Though all streamflow stations have been upgraded to the new ALERT2 protocol, most of the stations installed prior to WY2015 remained as ALERT1 ID format until this year. Streamgage IDs were all changed from ALERT1 to ALERT2 ID format in the spring of 2020. The District makes its data available to the public in several useful ways. This annual report is but one manner. Additionally, current and raw/analyzed data are available in real-time from the District’s flood warning web site. Historic data are also available from individual stream or dam/impoundment web pages. This report includes records on discharge at stream gages and at flood control storage structures. The count of sensors and stations is: Table 1: Station / Sensor Distribution Total Stations reported in this Report Total Sensors deployed Sensors on Streams Sensors on Impoundments Stage only sites Sites with multiple water-level sensors Status Sensors 207 217 136 71 7 3 5 Stream and impoundment gages are installed for various needs. For District owned channels, dams, and basins, ALERT gages are placed to monitor flow in channels, and impoundment behind dams to satisfy regulatory requirements. Additional stations are installed in response to local agency requests, current or future flood control project needs, public safety needs, and elsewhere as needed. iv DATA COLLECTION This is the 27th annual surface water report published by the District. Prior to water year 1994, surface water data collected by the FCDMC ALERT System were not quality controlled, and therefore, not published. Furthermore, remote sites did not send zero flow information and only transmitted during runoff events. Nevertheless, limited data are available prior to water year 1994 for stations that existed before October 1, 1993. Unfortunately, there is no available data for dates prior to October 1, 1987, even if the station existed prior to this date. The data are collected as a depth of flow in feet (aka stage). The discharge and/or volume is then obtained by applying the stage to a rating curve of stage versus discharge in cubic feet per second (cfs), or stage versus volume in acre-feet (ac-ft). The discharge rating curves have been developed at stream gages by using field surveyed cross sections for use in an HECRAS step-backwater computer model to obtain a range of stage versus discharge points to be plotted on a curve. These stepbackwater ratings are refined whenever possible using direct and/or indirect measurements made at or near the gage site. For flood control storage structures, discharge ratings were obtained in one of two ways. First, the design ratings may be used. In most cases however, the discharge rating curves were developed by application of the Federal Highway Administration’s HY-8 computer model for culvert flow and U.S. Geological Survey methods for weir flow over the uncontrolled emergency spillways. The storage rating curves were obtained from published as-built or construction plans or developed from digital elevation data. Daily mean discharges are computed by applying the daily mean stages (gage heights) to the stage-discharge curves or tables. A similar computation is done for storage facility volume. The minimum and maximum values are based on instantaneous discharge or volume readings and the volumes for discharge stations are based on accumulations of daily means. All data in this report have been reviewed and edited in an attempt to provide the most accurate data possible. A blank or blanks, represented with ---, within the data set is an indication that data were lost either due to hardware, software, or radio problems, or that the gage had not yet been installed. Where possible, these data are flagged with footnotes describing the time the gage was down. In the event that published records require revision, revisions are printed in later reports. Listed in the heading for each gage where records have been revised are all the reports in which revisions have been published for the station and the water years to which the revisions apply (e.g. WY1999: WY1994-95 means that the data for Water Years 1994-1995 were revised in the report for Water Year 1999). Revisions will be published in an appendix to the annual report. v Several streamflow gages are operated cooperatively between the FCDMC and the United States Geological Survey (USGS). There are several USGS coorperative sites that also house a District ALERT gage. Additionally, there are several continuous USGS gages that do not have a District ALERT gage at the USGS site. Also as part of the cooperative agreement, the USGS maintains a number of peak-only stations (noncontinuous) that only report an annual maximum. Tables 2 and 3 on the following pages show the USGS gages, along with any associated District gage as well. vi Table 2: USGS Continuous Stations, WY 2020 USGS Station Name USGS Station ID Indian Bend Wash at Curry Road nr Tempe 09512162 Location Lat/Long DD MM SS 33 26 25 / 111 54 52 FCD Gage No Salt River at Priest Drive nr Tempe 09512165 33 26 22 / 111 57 37 Yes, ID #67307 Cave Creek below Cottonwood Creek 09512280 33 53 14 / 111 57 12 Yes, ID #20707 New River near Rock Springs 09513780 33 58 27 / 112 05 54 No Skunk Creek near Phoenix 09513860 33 43 45 / 112 07 09 Yes, ID #65807 Gila River at Estrella Parkway nr Goodyear 09514100 33 23 15 / 112 23 30 Yes, ID #83807 Hassayampa River near Morristown 09516500 33 53 06 / 112 39 41 Yes, ID #45507 Hassayampa River near Arlington 09517000 33 20 50 / 112 43 30 No Centennial Wash at SPRR near Arlington 09517490 33 18 37 / 112 52 52 Yes, ID #24707 Table 3: USGS Annual Peak Stations, WY2020 USGS Station Name Vekol Wash at I-8 09488650 Location Lat/Long DD MM SS 32 50 30 / 112 15 04 Tortilla Creek at Tortilla Flat 09501300 33 31 38 / 111 23 13 No Camp Creek near Sunflower 09510170 33 45 35 / 111 29 44 No Rock Creek near Sunflower 09510180 33 43 49 / 111 30 28 No Indian Bend Wash at Shea Boulevard 09512090 33 35 05 / 111 58 10 Yes, ID #59507 Salt River Tributary in South Mountain Park 09512200 33 20 49 / 112 05 03 No Agua Fria River Tributary #2, near Rock Springs 09512700 34 02 00 / 112 08 42 No Deadman Wash near New River 09513820 33 50 30 / 112 08 40 No Waterman Wash near Buckeye 09514200 33 19 49 / 112 30 33 No Hartman Wash near Wickenburg 09515800 33 57 46 / 112 49 40 Yes, ID #51207 Ox Wash near Morristown 09516600 33 53 00 / 112 39 00 No Jackrabbit Wash near Tonopah 09516800 33 39 32 / 112 49 40 No Centennial Wash Tributary near Wenden 09517200 33 50 40 / 113 27 00 No Tiger Wash near Aguila 09517280 33 44 30 / 113 16 43 Yes, ID #27007 Winters Wash near Tonopah 09517400 33 29 22 / 112 55 05 No Rainbow Wash Tributary near Buckeye 09519600 33 14 35 / 112 38 15 No Bender Wash near Gila Bend 09519750 32 54 25 / 112 33 05 Yes, ID #40507 Sauceda Wash near Gila Bend 09519760 32 52 14 / 112 45 30 Yes, ID #71007 Military Wash near Sentinel 09520100 32 50 43 / 113 16 44 No Crater Range Wash near Ajo 09520230 32 33 44 / 112 52 37 No Star Wash near Tonopah 09516790 33 37 59 / 112 46 44 No None 33 28 08 / 112 58 10 Yes, ID #25007 Delaney Wash near Tonopah viii USGS Station ID FCD Gage Yes, ID #74507 DEFINITION OF TERMS Terms related to streamflow and other hydrologic data as used in this report are defined below: Table 4: Definitions Term Acre-foot (ac-ft or af) Definition The quantity of water required to cover 1 acre to a depth of 1 foot and is equivalent to 43,560 cubic feet or about 326,000 gallons or 1,233 cubic meters. Basin A typically man-made structure that is partially or entirely below the normal grade of land where it lies. It is for detaining water for release to another structure such as a storm drain. CAP Central Arizona Project, as in the CAP canal. Cubic Feet per Second (cfs) The rate of discharge representing a volumne of 1 cubic foot passing a given point during a one-second interval, and is equivalent to approximately 7.48 gallons per second, 448.8 gallons per minute, or 0.02832 cubic meters per second. The average discharge in cfs for a 24 hour period from midnight to midnight the following day. Daily Mean Discharge Data Gaps in Period of Record Discharge (Q) Data gaps referred to here are typically due to construction activites that cause the gage and station to be removed and out of service for a period of time. There are times when the station is down due to internal or external failure (battery, transmitter, repeater), but the station remains ‘in the ground.’ These gaps are not accounted for in this report. The volume of water (or more broadly, total fluid plus suspended sediment), that passes a given point within a given period of time. ix Drainage Area (DA) The area, measured in a horizontal plane, enclosed by a topographic divide from which direct surface runoff from precipitation normally drains by gravity into the stream above the specified point. Flood Flow Frequency Refers to the magnitude (in terms of peak discharge) and probability of floods at a given gaging station. The flood flow frequency is usually given as a peak discharge associated with a given recurrence interval at a particular gaging station. FRS Flood Retarding Structure, refers to dams originally constructed by the Soil Conservation Service (SCS), now known as the Natural Resources Conservation Service (NRCS). Gage (or gauge) Refers to a measuring device or sensor, such as a pressure transducer, or bubbler orifice, or a passive device, such as a staff gage, or crest-stage gage. Gage Datum The elevation of the zero point of the reference gage from which gage height is determined. This elevation is established by a system of levels from known bench marks or by approximation from topographic maps or arbitrarily established to a known point such as a culvert invert elevation. The water-surface elevation referred to some arbitrary gage datum. Gage height is often used interchangeably with the more general term "stage," although gage height is more appropriate when used with a reading on a gage. Gage Height Gage Station or Station A purpose-built structure containing sensors that make systematic observations of hydrologic data. Mean Discharge (cfs) (MEAN) is the arithmetic mean of individual daily mean discharges during a specific period. x NGVD29 – (aka MSL) NAVD88 Peak Discharge (cfs) A geodetic datum derived from a general adjustment of the first order level nets of both the United States and Canada. It was formerly called "Sea Level Datum of 1929" or "mean sea level." Although the datum was derived from the average sea level over a period of many years at 26 tide stations along the Atlantic, Gulf of Mexico, and Pacific Coasts, it does not necessarily represent local mean sea level at any particular place. A datum based on the mass or density of the Earth instead of the varying values of the heights of the seas. Measurements of the acceleration of gravity are made at observation points in a network. Only one point is defined as the datum point. The vertical reference surface is then defined by the surface on which the gravity values are equal to the datum point value. This is called an equipotential surface. is the maximum instantaneous discharge for a given flood event. Period of Record (POR) is the time period for which data exists for a given stream gaging station. Pressure Transducer is an instrument used to measure the depth of water. It is an analog instrument which measures a pressure change over a diaphragm. The depth of water is related to the change in pressure over the diaphragm created by the weight of the water above the instrument. is the reciprocal of the probability of a flood occurring in any given year. Thus, the flood having a 1% (1/100, or 1 in 100) chance of occurring in any given year has a recurrence interval of 100 years and is referred to as the 100-year flood. Similarly, the flood having a 50% (1/2 or 1 in 2) chance of occurring in any given year has a recurrence interval of 2 years and is referred to as the 2year flood. A sensor, in terms of stream-gaging, is a device that detects the presence of water, and could be a transducer, a bubbler-line, a status sensor, a RADAR device, a float device (USGS), or other mechanism that responds to the presence of water. Recurrence Interval Sensor xi Staff Gage Is a device located at the gaging station to provide a visual reference to the depth of water at a gage in terms of gage height above the water level measuring instrument. Stage-Discharge Relationship Is the relation between gage height (stage) and the volume of water, per unit of time, flowing in a channel or from a pipe or culvert. Stage-Only Site Sites that only measure stage, but no discharge or volume. Sites would include two Game and Fish water troughs, two underpass sites in downtown Phoenix, and three sites with status sensors, but no other sensor types. Stage-Storage Relationship is the relation between gage height (stage) and the volume of water stored behind or within a flood control impoundment structure. Station See ‘Gage Station, or Station’ in the table above. Status Sensor A device that trips a switch ‘on’ when a float on the sensor is actuated by rising water level. Conversely, the switch is ‘off’ when the water level falls below the levels of the float. Is used to indicate that water has reached a predetermined level. is the discharge that occurs in a natural channel. Although the term "discharge" can be applied to the flow of a canal, the word "streamflow" uniquely describes the discharge in a surface stream course. The term "streamflow" is more general than "runoff" as streamflow may be applied to discharge whether or not it is affected by diversion or regulation. dealing with surface-water data is the 12-month period, October 1 through September 30. The water year is designated by the calendar year in which it ends and includes 9 of the 12 months. Thus, the water year beginning October 1, 2015 and ending September 30, 2016, is called the "2016 Water Year." Streamflow Water Year xii FCDMC STREAMFLOW AND IMPOUNDMENT GAGE LOCATIONS – WY 2020 Streamflow Station Impoundment / Storage Station xiii New Installations in Water Year 2020 There were 2 new streamgage stations established during Water Year 2020. Table 5: New Installations Station Deadman Wash at SR303L New River at SR303L ID 62107 62213 Date Installed 10/17/2019 12/12/2019 Requesting Agency City of Peoria City of Peoria Station Changes in Water Year 2020   ALERT 1 ID’s have all been changed to ALERT2 ID’s. Tat Momolikot Station (773/64207) permanently removed on May 20, 2020. xiv Gage Stations included in this report (click on page number to go to that page) NAME ID Page Arizona Canal Diversion Channel (ACDC) at 36h Street 10007 1 ACDC at 14th Street 10507 5 ACDC at 43rd Avenue 11307 9 th ACDC at 67 Avenue 13807 13 Adobe Dam Pool 65017 18 Adobe Dam Outlet 65007 23 Agua Fria River at Grand Avenue 14707 27 Agua Fria River at Buckeye Road (MC-85) 85307 31 Amigos Wash 80507 35 Antelope Creek 55207 39 Apache Junction FRS 81307 43 Apache Trail 36507 49 Aspen Dam 78707 53 rd Baseline Road at 43 Avenue Basin 66407 59 Bender Wash 40507 65 Berneil Wash 59207 69 Blue Tank Wash 52707 73 Box Wash 47507 77 Buckeye FRS #1 44007 79 Buckeye FRS #2 44507 85 Buckeye FRS #3 48807 93 Bullard Wash at Indian School Road 89507 99 Bullard Wash at Van Buren Street 89207 103 Camelback Road at 24th Avenue Basin 6807 107 CAP Reach #11 Dike #1 8407 113 CAP Reach #11 Dike #2 58607 119 CAP Reach #11 Dike #3 60107 125 CAP Reach #11 Dike #4 59807 131 Casandro Wash 52007 137 Casandro Dam 53007 141 Cave Buttes Dam Pool 19517 147 Cave Buttes Dam Outlet 19507 152 Cave Creek at Ashdale Ranger Station 21307 156 Cave Creek at Spur Cross 20707 160 Cave Creek (in town of Cave Creek) 19007 164 Cave Creek near Cave Creek 20507 168 Cave Creek at CAP 19807 172 Cave Creek at Cactus Road 11807 176 Centennial Wash near Aguila 29007 180 Centennial Wash at Wenden 27507 184 Centennial Levee 25707 188 Centennial Wash at UPRR 24707 192 Centennial Tributary at Dobbins Road 22807 196 xv NAME Cline Creek Colter Channel at El Mirage Road Columbus Wash Copper Wash Crossroads Park Cruff Wash Daggs Wash Deadman Wash at SR303L Delaney Wash Desert Hills Wash Dreamy Draw Dam Dysart Drain at LAFB Dysart Drain at El Mirage Road East Fork Cave Creek Basin #1 East Fork Cave Creek Basin #3A East Fork Cave Creek Basin #3B East Fork Cave Creek Basin #4 East Fork Cave Creek near 7th Avenue El Mirage Road Drain East Maricopa Floodway (EMF) at Broadway Road EMF below Powerline Floodway EMF at Queen Creek Road EMF at Arizona Avenue Estrella Fan Flying E Wash Ford Canyon Wash Fourth of July Wash Freestone Basin Galloway Wash at Galloway Road Gila River at Olberg Road Gila River at Maricopa Road Gila River at 116th Avenue Bridge (Avondale Blvd.) Gila River at Estrella Parkway Golden Eagle Park Dam Grand Avenue at 27th Avenue Basin Granite Reef Diversion Granite Reef Wash Greene Wash at SR84 Guadalupe Channel Guadalupe FRS Harquahala FRS Hartman Wash Hassayampa River at Wagoner Bridge Hassayampa River at Box Canyon xvi ID 66007 85507 40807 41007 33007 23707 48507 62107 25007 19307 9807 85807 85707 7807 8807 8707 8207 8507 14507 34307 33707 34807 35507 84207 51707 86207 41207 32807 20607 42007 41707 70707 83807 78007 3807 75007 57507 64007 35707 68207 26007 51207 54307 53507 Page 200 204 208 212 216 221 225 229 233 237 241 247 251 255 261 267 273 279 283 287 291 295 299 303 307 311 315 319 324 328 332 336 340 344 350 356 360 364 368 372 378 384 388 392 NAME Hassayampa River at US60 Hassayampa River near Morristown Hassayamap River at I-10 Hesperus Dam Indian Bend Wash (IBW) at Sweetwater Avenue IBW at Shea Boulevard IBW near Indian Bend Road IBW at McDonald Drive IBW at Indian School Road IBW near McKellips Road IBW Interceptor Channel Jackrabbit Wash Lake Margherite Laveen Basin Magma FRS Martinez Creek McDowell Mountain Road McMicken Dam at Bell Road McMicken Dam McMicken Floodway Mineral Canyon Basin New River Fire New River at SR303L New River Dam Pool New River Dam Outlet New River at Bell Road New River at Glendale Avenue North Heights Dam Old Crosscut Canal Paradise Lane at 33rd Drive Basin Paradise Lane at 47th Avenue Basin Pecos Sediment Basin Pecol Basin Pool Pecos North Inlet Pecos East Inlet Pecos West Inlet Phoenix Dam #2A Phoenix Dam #2B Phoenix Dam #3 Phoenix Dam #4 Phoenix Dam #7 Phoenix Dam #99 Phoenix East Park Dam Phoenix West Park Dam xvii ID 45707 45507 48007 79007 58307 59507 56307 57207 56507 55707 56807 45007 59007 67807 42307 49507 76007 71507 71707 71307 68807 62707 62213 62017 62007 61707 61507 78207 4707 12407 13707 70007 70017 69307 69507 69807 8907 9907 11507 12207 13307 12707 13007 13507 Page 396 400 404 408 414 418 422 426 430 434 438 442 446 450 456 462 466 470 474 480 484 490 494 498 503 507 511 517 523 527 533 539 545 551 555 559 563 569 575 583 587 593 599 605 NAME Phoenix Zoo Dam #3 Phoenix Zoo Dam #5 Picacho Wash Pima Canyon Wash Powder House Wash Powerline Floodway Powerline FRS Price Drain at Loop 202 Prickly Pear Wash Queen Creek at CAP Queen Creek at Rittenhouse Road Rainbow Wash Rawhide Wash Reata Pass Dam Reata Pass Wash Rittenhouse FRS Roeser Road at 23rd Avenue Basin Saddleback FRS Salt River below Granite Reef Diversion Salt River at Val Vista Drive Salt River at Priest Drive Salt River at 7th Avenue Salt River at 51st Avenue Salt River at 67th Avenue Sand Tank Wash at I-8 Santa Cruz River at SR84 Sauceda Wash Scatter Wash Seven Springs Wash Signal Butte FRS Siphon Draw Wash at Signal Butte Road Skunk Creek near New River Skunk Creek at Desert Hills Drive Skunk Creek at Carefree Highway Skunk Creek at Dixileta Drive Skunk Creek at I-17 Skunk Tank Wash Sols Wash at SR71 Sols Wash Tributary at US93 Sols Wash near Matthie Sonoqui Wash near Hawes Road Sonoran Wash South Mountain Fan Spookhill FRS ID 4307 4407 74207 68707 52507 37507 36807 31507 8107 38007 37707 42807 61007 61207 60007 37207 66807 25207 75307 39507 67307 68007 5307 5807 40007 63807 71007 14007 21807 79507 37607 66207 64807 65707 64907 65807 64707 47707 50007 50807 36307 65907 70507 74707 xviii Page 611 617 623 627 631 635 639 645 649 653 657 661 665 669 673 679 685 691 697 701 705 709 713 717 721 725 729 733 737 741 747 751 755 759 763 767 771 775 779 783 787 791 795 799 NAME Spookhill FRS at McDowell Road Spookhill FRS at McKellips Road Spookhill FRS at Brown Road Stagecoach Wash Stoneridge Dam Sun Valley Parkway at Northern Avenue Wash Sunnycove FRS Sunridge Canyon Dam Sunset FRS Sycamore Creek Fire PT Tat Momolikot Dam Tatum Wash Basin Inlet Tatum Wash Basin Tenth Street Wash Basin #1 Tiger Wash Twin Buttes Wash University Drive at 62nd Street (Mesa) Basin Upper Trilby Wash UPRR Underpass at First Avenue UPRR Underpass at Central Avenue US60 at Gold Canyon Wash Vekol Wash Vineyard FRS Vulture Mine Road Wagner Wash at Sun Valley Parkway Waterman Wash at Rainbow Valley Road Weekes Wash at Baseline Road White Tanks FRS #3 White Tanks FRS #4 White Tank Outflow Channel Whitlow Ranch Dam Winters Wash xix ID 80007 79807 81507 20007 77307 48307 46507 77507 46007 81807 64207 58007 58507 11007 27007 73207 34607 73807 3107 3207 36907 74507 37007 47007 44707 83307 39207 87307 87807 87407 63307 25507 Page 805 811 815 823 827 833 837 843 849 853 859 865 869 875 879 885 889 895 899 903 907 911 915 921 925 929 933 937 943 949 953 959 SUMMARY OF SIGNIFICANT STREAMFLOW EVENTS Rainfall and runoff in Maricopa County occurs primarily in the winter and summer. Ocasionally, significant rainfall occurs during the transitional season following the summer monsoon. In summary, Water Year 2020 was a year of significant contrast. The water year started with a dry October, but turned rainy in the second half of November, with significant events on November 20 and 29. Many streams recorded high flows on and around those two dates. Additional rainfall and runoff occurred in December, around the ninth, and around the period of the 24th – 27th. January turned drier with no notable runoff. Again, winter storms picked up in frequency in February and March with events on 2/10, 2/20-21, and a period 3/11-3/18, with additional significant runoff events on and around March 13. Significant snow and rain in the upper watersheds of the Salt and Verde Rivers caused the storage reservoirs to fill, and the Salt River through Phoenix to flow for the second consecutive winter. The busy winter season was not matched in the summer monsoon season. There were only three days in the summer that runoff occurred: July 23, August 20 and August 30. As a contrast, the winter season recorded 855 events among all the stream stations, whereas during the summer season, there were 37 events recorded among all the stream stations. Stations recording flow in winter: Stations with no flow in winter: Stations recording flow in summer: Stations with no flow in summer: 158 46 32 172 77.5 % 22.5 % 15.7 % 84.3 % Highlights of the runoff and impoundment events are summarized on the following three pages. xx Maximum Flows for Water Year 2020 at Selected FCDMC Water Level Sensor Locations Red values are peaks of record Location ACDC at 43rd Avenue (11307) ACDC at 67th Avenue (13807) Agua Fria at Buckeye Road (85307) Cave Creek at Ashdale RS (21307) Cave Creek at Spur Cross (20707) Cave Creek (19007) Cave Creek near Cave Creek (20507) Cave Creek near Cave Creek (20507) Cave Creek near Cactus Road (11807) Centennial Wash at Wenden (27507) Centennial Wash at UPRR (24707) Cline Creek (66007) Cruff Wash (23707) East Fork Cave Creek near 7th Avenue (8507) Flying E Wash (51707) Fourth of July Wash (41207) Hassayampa River at Wagoner (54307) Hassayampa River at Box Canyon (53507) Hassayampa River at Box Canyon (53507) Hassayampa River at US60 (45707) Hassayampa River at US60 (45707) Hassayampa River near Morristown (45507) Hassayampa River near Morristown (45507) Hassayampa River at I‐10 (48807) Hassayampa River at I‐10 (48807) Indian Bend Wash at McDonald Drive (57207) Indian Bend Wash at Indian School Road (56507) Indian Bend Wash near McKellips Road (55707) Jackrabbit Wash (45007) Martinez Creek (49507) Discharge (cfs) Stage (feet) 1,250 1,574 1,739 2,058 2,248 2,304 1,491 1,449 432 2,229 1,628 982 1,627 700 1,242 781 440 1,914 7,641 5,590 5,432 2,110 4,664 767 987 907 713 789 1,222 1,479 Continued 2.71 5.51 0.76 6.77 8.33 6.15 3.45 3.40 10.41 3.86 10.50 4.26 4.73 2.58 2.80 2.20 3.07 6.53 10.08 2.87 2.84 9.88 11.13 2.64 2.98 1.26 2.36 2.55 3.51 5.97 Next Date 11/20/2019 11/20/2019 03/13/2020 03/13/2020 03/13/2020 03/13/2020 11/29/2019 03/13/2020 11/20/2019 11/29/2019 03/13/2020 11/20/2019 03/12/2020 03/13/2020 Unknown 11/29/2019 03/13/2020 11/20/2019 03/13/2020 11/29/2019 03/13/2020 11/29/2019 03/13/2020 11/29/2019 03/13/2020 03/13/2020 03/14/2020 03/13/2020 03/13/2020 11/29/2019 Page Note: Many stations recorded multiple events. These are the maximum peaks for the year. xxi Water Year 2020 Maximum Flows for Water Year 2020 at Selected FCDMC Water Level Sensor Locations, continuted Red values are peaks of record Location Discharge (cfs) Stage (feet) Date New River Fire (62707) New River Fire (62707) New River Fire (62707) New River at SR303L (62213) New River Dam Outlet (62007) New River at Bell Road (61707) New River at Glendale Ave (61507/61513) Price Drain (31507) Queen Creek at CAP (38007) Rainbow Wash (42807) Salt River at Granite Reef Dam (75307) Salt River at Val Vista Drive (39507) Salt River at Priest Drive (67307) Salt River at 7th Avenue (68007) Salt River at 51st Avenue (5307) Salt River at 67th Avenue (5807) Seven Springs Wash (21807) Skunk Creek at Desert Hills Drive (64807) Skunk Creek at Carefree Highway (65707) Skunk Creek at Dixileta Drive (64907) Skunk Creek at I‐17 (65807) Sols Wash near Matthie (50807) Tiger Wash (27007) White Tank Outfall at Indian School Rd (87407) 12,151 10,660 3,210 3,107 823 1,013 2,371 360 628 1,899 3,004 3,022 4,119 1,722 485 552 558 1,370 2,362 1,394 1,835 710 1,481 425 6.75 6.20 3.09 4.81 7.89 1.50 4.18 4.95 5.65 3.84 10.31 4.81 5.93 6.62 4.20 5.49 3.16 3.17 4.50 3.94 2.67 1.99 7.22 2.06 11/20/2019 11/29/2019 03/13/2020 03/13/2020 11/29/2019 11/29/2019 03/12/2020 07/24/2020 03/19/2020 07/23/2020 03/22/2020 03/22/2020 03/22/2020 03/23/2020 03/24/2020 03/24/2020 03/13/2020 11/20/2019 11/20/2019 11/20/2019 11/20/2019 11/21/2019 11/29/2019 07/23/2020 Note: Many stations recorded multiple events. These include the maximum peaks for the year. xxii Water Year 2020 Maximum Impoundments for Water Year 2020 at Selected FCDMC Water Level Sensor Locations Red values are peaks of record Location Adobe Dam Pool (65017) Buckeye FRS #2 (44507) Casandro Dam Pool (53007) Cave Buttes Dam Pool (19517) Dreamy Draw Dam (9807) New River Dam Pool (62017) New River Dam Pool (62017) North Heights Dam (78207) Pecos Sediment Basin (70007) Phoenix Dam 2A (8907) Phoenix Dam 2B (9907) Phoenix Dam 3 (11507) Phoenix Dam 4 (12207) Phoenix Dam 7 (13307) Phoenix East Park Dam (13007) Phoenix West Park Dam (13507) Phoenix West Park Dam (13507) Saddleback FRS (25207) Sunnycove FRS (46507) Sunset FRS (46007) Tat Momolikot Dam (773/64207) White Tank FRS #3 (87307) White Tank FRS #4 (87807) Discharge (cfs) Stage (feet) 202 29 16 179 116 803 326 129 19 26 19 50 20 46 31 45 45 37 0 0 0 0 0 5.21 0.71 6.21 13.08 8.42 12.62 6.75 7.19 8.13 8.32 4.32 9.27 5.40 8.02 3.93 6.83 6.73 1.07 11.19 7.29 4.68 2.04 6.41 Contents (ac‐ft) 72.8 0.7 9.7 88.4 2.8 1,035.2 270.0 2.1 16.9 12.1 2.2 5.0 3.0 4.5 1.3 10.3 10.1 68.3 9.1 8.0 932.0 119.0 66.6 Date (%full) 0.3 0.1 8.0 0.2 0.9 2.3 0.6 1.6 36.9 20.3 4.5 8.6 7.1 3.7 6.2 9.1 9.0 1.0 4.4 10.3 0.5 3.5 4.5 11/21/2019 03/12/2020 11/29/2019 11/30/2019 03/12/2020 11/29/2019 03/13/2020 02/10/2020 11/30/2019 03/13/2020 03/13/2020 03/13/2020 03/12/2020 03/13/2020 03/13/2020 11/29/2019 03/13/2020 11/29/2019 11/29/2019 11/29/2019 02/10/2020 11/20/2019 03/19/2020 Note: Many stations recorded multiple events. These include the maximum peaks for the year. xxiii Water Year 2020 DATA PRESENTATION The following pages present the data collected by the Flood Control District ALERT system. Data have been retrieved from a TriLynx Systems, LLC® NovaStar5 database, maintained at the Flood Control District of Maricopa County. The data pages are in alphabetical order by name. If there is more than one station on a stream such as Cave Creek, the stations are placed in stream order, upstream to downstream. The data tables included with each gage are reports directly produced by a database function. In the tables where there are dashes “‐ ‐ ‐“ on a particular date or dates, the gage was down. Typically a gage is down when the gage itself fails, or a transmitter or repeater fails. In the case of transmitter failure or repeater failure, data for that date is available by manual download. However, when no event has occurred, the data will typically not be retrieved from the device. xxiv Water Year 2020 Arizona Canal Diversion Channel at 36th Street, ID #10007 Site Data LOCATION At the inlet to the ACDC near 36th Street and Stanford Drive DRAINAGE AREA 4.8 mi2 STREAM TYPE Engineered Basin / Channel JURISDICTION Phoenix, Arizona WATERSHED Upper ACDC SECTION/TOWNSHIP/RANGE S13 T2N R3E LATITUDE N 33° 30' 49.3" | +33.51368 LONGITUDE W 111° 59' 58.7" | ‐111.99963 STREAMGAGE INSTALLATION DATE 02/24/1994 ‐ WY 1994 AVAILABLE PERIOD OF RECORD (POR) 02/24/1994 ‐ Current LENGTH OF AVAILABLE POR DATA 26.60 Years | 9,716 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.12 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,237.92 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 479 cfs | 7.89 feet | 10/02/2018 FCDMC Annual Surface Water Report, Water Year 2020 Page 1 Watershed Map ACDC at 36th Street - water year peaks 600 Discharge (cfs) 500 400 300 200 100 0 1990 1995 2000 FCDMC Annual Surface Water Report, Water Year 2020 Page 2 2005 2010 Water Year 2015 2020 2025 WY2020 Events Date of Peak 10/05/2019 11/20/2019 11/29/2019 12/09/2019 12/27/2019 02/11/2020 02/22/2020 03/11/2020 03/12/2020 03/13/2020 03/18/2020 08/20/2020 Peak Gage Height 0.74 2.08 1.34 2.61 0.66 0.84 1.04 0.99 0.89 1.47 0.72 1.40 Peak Discharge (cfs) 4 21 10 30 4 5 7 6 6 11 4 11 Hydrograph of peak WY 2020 flow event, 12/09/2019 Flood Flow Frequency Flood Flow Frequency N=27, HEC‐WRC computation (based on 27 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 23 72 138 246 490 793 FCDMC Annual Surface Water Report, Water Year 2020 Page 3 ACDC at 36th Street, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 2 6 7 8 9 7 10 1 11 2 3 12 3 13 5 14 1 15 16 17 18 1 19 20 6 1 21 22 2 23 24 25 1 26 27 1 28 29 2 30 --31 ---------------------------------------------------------------------------------------TOTAL 2 8 11 0 5 12 0 0 0 0 2 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 4 21 30 0 7 11 0 0 0 0 11 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 4 17 22 0 10 24 0 0 0 0 3 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 40 MEAN 0 MAX 30 MIN 0 AC_FT 79 FCDMC Annual Surface Water Report, Water Year 2020 Page 4 Arizona Canal Diversion Channel at 14th Street – ID #10507 Site Data LOCATION Near 14th Street and Orangewood Avenue DRAINAGE AREA 13.6 mi2 STREAM TYPE Engineered Channel JURISDICTION Phoenix, Arizona WATERSHED Upper ACDC SECTION/TOWNSHIP/RANGE S04 T2N R3E LATITUDE N 33° 32' 37.3" | +33.54369 LONGITUDE W 112° 03' 05.1" | ‐112.05141 STREAMGAGE INSTALLATION DATE 02/09/1994 ‐ WY 1994 AVAILABLE PERIOD OF RECORD (POR) 02/09/1994 ‐ Current LENGTH OF AVAILABLE POR DATA 26.64 Years | 9,731 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.35 feet Gage Height STAFF GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,216.04 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 1,414 cfs | 6.75 feet | 09/08/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 5 Watershed Map ACDC at 14th Street - water year peaks 1,600 Discharge (cfs) 1,400 1,200 1,000 800 600 400 200 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 6 2015 2020 2025 WY2020 Events Date of Peak 11/29/2019 12/24/2019 03/12/2020 03/13/2020 Peak Gage Height (feet) 0.91 0.66 1.12 0.99 Peak Discharge (cfs) 46 25 68 54 Hydrograph of peak WY 2020 flow event, 03/12/2020 Flood Flow Frequency Flood Flow Frequency N=27, HEC‐WRC computation (based on 27 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 111 326 507 688 919 1080 FCDMC Annual Surface Water Report, Water Year 2020 Page 7 ACDC at 14th Street, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 5 13 8 14 15 16 17 18 19 20 21 22 23 24 2 25 26 27 28 29 6 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 6 2 0 0 13 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 46 25 0 0 68 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 12 4 0 0 25 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 21 MEAN 0 MAX 68 MIN 0 AC_FT 42 FCDMC Annual Surface Water Report, Water Year 2020 Page 8 Arizona Canal Diversion Channel at 43rd Avenue, ID #11307 Site Data LOCATION Near Peoria and 43rd Avenues DRAINAGE AREA 56 mi2 below Cave Buttes Dam STREAM TYPE Engineered Channel JURISDICTION Phoenix, Arizona WATERSHED Upper ACDC SECTION/TOWNSHIP/RANGE S22 T3N R2E LATITUDE N 33° 35' 02.4" | +33.58400 LONGITUDE W 112° 09' 15.2" | ‐112.15422 STREAMGAGE INSTALLATION DATE 11/14/1990 ‐ WY 1991 AVAILABLE PERIOD OF RECORD (POR) 11/14/1990 ‐ Current LENGTH OF AVAILABLE POR DATA 29.88 Years | 10,914 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.95 feet Gage Height STAFF GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,200.58 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 5,601 cfs | 6.58 feet | 09/08/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 9 Watershed Map ACDC at 43rd Avenue - water year peaks 6,000 Discharge (cfs) 5,000 4,000 3,000 2,000 1,000 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 10 2015 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/20/2019 11/29/2019 12/07/2019 12/09/2019 12/25/2019 02/11/2020 02/22/2020 03/12/2020 03/12/2020 03/13/2020 Peak Gage Height (feet) 2.41 2.71 2.11 1.21 1.59 1.24 1.56 1.51 1.59 1.21 2.14 Peak Discharge (cfs) 1,008 1,250 773 254 439 267 422 396 439 254 795 Hydrograph of peak WY 2020 flow event, 11/20/2019 Flood Flow Frequency Flood Flow Frequency N=30, HEC‐WRC computation (based on 30 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 1,100 2,150 3,060 4,100 5,730 7,180 FCDMC Annual Surface Water Report, Water Year 2020 Page 11 ACDC at 43rd Avenue, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 11 8 9 21 10 11 70 12 49 13 123 14 15 16 17 18 19 20 336 21 7 22 85 23 24 25 22 26 27 28 29 165 30 --31 ---------------------------------------------------------------------------------------TOTAL 4 511 56 1 157 176 3 3 3 3 3 3 MEAN 0 17 2 0 5 6 0 0 0 0 0 0 MAX 0 1250 439 0 422 795 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 7 1013 110 3 311 350 6 6 6 5 6 5 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 921 MEAN 3 MAX 1250 MIN 0 AC_FT 1827 FCDMC Annual Surface Water Report, Water Year 2020 Page 12 Arizona Canal Diversion Channel at 67th Avenue, ID #13807 Site Data LOCATION On 67th Avenue south of Greenway Road DRAINAGE AREA 283.7 mi2 below Cave Buttes Dam STREAM TYPE Engineered Channel JURISDICTION Glendale, Arizona WATERSHED Upper ACDC SECTION/TOWNSHIP/RANGE S12 T3N R1E LATITUDE N 33° 37' 17.8" | +33.62161 LONGITUDE W 112° 12' 09.7" | ‐112.20269 STREAMGAGE INSTALLATION DATE 06/07/1990 ‐ WY 1990 AVAILABLE PERIOD OF RECORD (POR) 06/07/1990 ‐ Current LENGTH OF AVAILABLE POR DATA 30.32 Years | 11,074 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.00 feet Gage Height STAFF GAGES 2 CREST STAGE GAGES 4 ZERO GAGE HEIGHT ELEVATION 1,189.06 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 5,511 cfs | 8.40 feet | 09/08/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 13 Watershed Map ACDC at 67th Avenue - water year peaks 6,000 Discharge (cfs) 5,000 4,000 3,000 2,000 1,000 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 14 2015 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/29/2019 12/01/2019 12/09/2019 12/24/2019 12/25/2019 02/11/2020 02/22/2020 03/13/2020 03/13/2020 03/13/2020 03/15/2020 03/19/2020 08/31/2020 Peak Gage Height (feet) 5.51 5.12 3.65 3.60 2.67 3.21 4.43 4.24 4.43 4.43 4.77 3.36 3.16 0.68 Hydrograph of peak WY 2020 flow event, 11/20/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 15 Peak Discharge (cfs) 1,574 1,265 395 373 107 231 794 683 794 794 1,013 279 216 13 Flood Flow Frequency Flood Flow Frequency N=30, HEC‐WRC computation (based on 30 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 874 1,830 2,610 3,450 4,660 5,640 NOTE(1): These results are based on very limited data. NOTE(2): Cave Buttes Dam upstream limits the peak discharge from the upper portion of the watershed. Flood Flow Frequency U.S. Army Corps of Engineers Design 2‐year 5‐year 10‐year 25‐year 50‐year 100‐year 1,900 4,500 7,700 13,500 20,600 29,000 FCDMC Annual Surface Water Report, Water Year 2020 Page 16 ACDC at 67th Avenue, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 270 22 17 16 2 9 82 20 17 17 3 14 21 21 19 16 4 14 17 20 22 16 5 13 16 21 22 14 6 20 16 21 22 13 7 13 17 18 20 13 8 12 49 17 19 14 9 12 102 21 18 15 10 12 45 20 17 14 11 12 19 22 265 62 12 14 19 22 28 247 13 15 18 21 19 538 14 15 16 20 18 241 15 15 16 20 18 195 16 15 19 20 18 165 17 15 19 19 17 53 18 15 18 20 16 58 19 20 20 18 16 80 20 691 20 17 15 22 21 442 19 20 14 16 22 203 19 19 240 15 23 58 19 18 88 13 24 24 60 19 25 14 25 19 110 18 17 14 26 19 46 18 19 15 27 19 37 16 18 18 28 16 41 18 16 17 29 487 27 19 16 15 30 162 23 17 --14 31 --21 17 --10 ----3 -------------------------------------------------------------------------------TOTAL 0 2394 1242 598 1077 1971 0 0 0 0 3 0 MEAN 0 80 40 19 37 64 0 0 0 0 0 0 MAX 0 1574 395 28 794 1013 0 0 0 0 13 0 MIN 0 0 9 8 7 0 0 0 0 0 0 0 AC_FT 0 4749 2464 1186 2137 3910 0 0 0 0 7 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 7287 MEAN 20 MAX 1574 MIN 0 AC_FT 14453 FCDMC Annual Surface Water Report, Water Year 2020 Page 17 Adobe Dam Pool, ID #65017 Site Data LOCATION Near 43rd Avenue and Deer Valley Drive DRAINAGE AREA 89.6 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Phoenix, Arizona WATERSHED Skunk Creek SECTION/TOWNSHIP/RANGE S21 T4N R2E LATITUDE N 33° 40' 38.0" | +33.67670 LONGITUDE W 112° 09' 14.3" | ‐112.15397 STREAMGAGE INSTALLATION DATE 10/28/1982 ‐ WY 1983 AVAILABLE PERIOD OF RECORD (POR) 08/30/1988 ‐ Current LENGTH OF AVAILABLE POR DATA 32.09 Years | 11,720 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 2.85 Feet Gage Height STAFF GAGES 14 ZERO GAGE HEIGHT ELEVATION 1,339.81 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY ELEVATION 39.77 feet Gage Height TOP OF DAM ELEVATION 65.07 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 18 Watershed Map Volume (acre-feet) Adobe Dam Pool - water year peaks 2,000 1,800 1,600 1,400 1,200 1,000 800 600 400 200 0 1985 1990 1995 2000 2005 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 19 2010 2015 2020 2025 WY2020 Events Date of Peak 11/21/2019 11/29/2019 Peak Gage Height (feet) 5.21 5.04 Peak Volume (ac‐ft) 72.8 66.9 Hydrograph of peak WY 2020 impoundment event, 11/21/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 20 Percent Spillway Capacity 0.3 0.3 Adobe Dam Pool, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 11 12 13 14 15 16 17 18 19 20 21 23 22 23 24 25 26 27 28 29 22 30 --31 ---------------------------------------------------------------------------------------MEAN 0 2 0 0 0 0 0 0 0 0 0 0 MAX 0 73 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 73 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 21 Adobe Dam Pool, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 3 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 4 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 5 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 6 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 7 2.9 2.9 2.9 2.9 --2.9 2.9 2.9 2.9 2.9 2.9 2.9 8 2.9 2.9 2.9 2.9 --2.9 2.9 2.9 2.9 2.9 2.9 2.9 9 2.9 2.9 2.9 2.9 --2.9 2.9 2.9 2.9 2.9 2.9 2.9 10 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 11 2.9 2.9 2.9 2.9 2.9 0.0 2.9 2.9 2.9 2.9 2.9 2.9 12 2.9 2.9 2.9 2.9 2.9 2.9 0.0 2.9 2.9 2.9 2.9 2.9 13 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 14 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 15 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 16 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 17 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 18 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 19 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 20 2.9 0.0 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 21 2.9 3.6 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 22 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 23 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 24 2.9 2.9 2.9 2.9 2.9 0.0 2.9 2.9 2.9 2.9 2.9 2.9 25 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 26 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 27 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 28 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 29 2.9 3.5 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 30 2.9 2.9 2.9 2.9 --2.9 2.9 2.9 2.9 2.9 2.9 2.9 31 2.9 --2.9 2.9 --2.9 --2.9 --2.9 2.9 -------------------------------------------------------------------------------MEAN 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 MAX 2.9 5.2 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 MIN 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 -----------------------------------------------------------------------------WTR YR 2020 MEAN 2.85 MAX 5.21 MIN 2.85 FCDMC Annual Surface Water Report, Water Year 2020 Page 22 Adobe Dam Outlet, ID #65007 Site Data LOCATION Near 43rd Avenue and Deer Valley Drive DRAINAGE AREA 89.6 mi2 STREAM TYPE Engineered Channel JURISDICTION Phoenix, Arizona WATERSHED Upper ACDC SECTION/TOWNSHIP/RANGE S21 T4N R2E LATITUDE N 33° 40' 38.0" | +33.67670 LONGITUDE W 112° 09' 14.3" | ‐112.15397 STREAMGAGE INSTALLATION DATE 10/28/1982 ‐ WY 1983 AVAILABLE PERIOD OF RECORD (POR) 08/30/1990 ‐ Current LENGTH OF AVAILABLE POR DATA 32.09 Years | 11,720 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.00 feet Gage Height STAFF GAGES 1 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,330.27 feet NAVD88 POINT OF ZERO FLOW ‐0.3 feet Gage Height EXTREME FOR PERIOD OF RECORD 1,239 cfs | 7.01 feet GH | 01/22/2010 FCDMC Annual Surface Water Report, Water Year 2020 Page 23 Watershed Map Adobe Dam Outlet - water year peaks 1,400 Discharge (cfs) 1,200 1,000 800 600 400 200 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 24 2015 2020 2025 WY2020 Events Date of Peak 11/21/2019 11/29/2019 12/09/2019 Peak Gage Height 3.56 3.40 0.68 Peak Discharge (cfs) 248 229 11 Hydrograph of peak WY 2020 flow event, 11/21/2019 Flood Flow Frequency Flows past this gage are regulated by Adobe Dam directly upstream. Flood Flow Frequency is therefore not valid. FCDMC Annual Surface Water Report, Water Year 2020 Page 25 Adobe Dam Outlet, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 7 2 4 3 1 4 5 6 7 --8 --9 2 --10 4 11 1 12 13 14 15 16 17 18 19 20 --21 119 29 22 17 23 9 24 4 25 2 26 1 27 28 29 96 30 28 --31 ---------------------------------------------------------------------------------------TOTAL 0 276 18 0 0 0 29 0 0 0 0 0 MEAN 0 9 1 0 0 0 1 0 0 0 0 0 MAX 0 248 11 0 0 0 175 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 547 36 0 0 0 58 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 323 MEAN 1 MAX 248 MIN 0 AC_FT 641 FCDMC Annual Surface Water Report, Water Year 2020 Page 26 Agua Fria River at Grand Avenue, ID #14707 Site Data LOCATION On Grand Avenue west of 113th Avenue DRAINAGE AREA 1,628 mi2 STREAM TYPE Channelized Natural Stream JURISDICTION El Mirage, Arizona WATERSHED White Tanks A / Lower Agua Fria SECTION/TOWNSHIP/RANGE S18 T3N R1E LATITUDE N 33° 36' 26.6" | +33.60739 LONGITUDE W 112° 18' 20.6" | ‐112.30571 STREAMGAGE INSTALLATION DATE 04/27/1994 ‐ WY 1994 AVAILABLE PERIOD OF RECORD (POR) 04/27/1994 ‐ Current LENGTH OF AVAILABLE POR DATA 26.43 Years | 9,654 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 2.50 feet Gage Height STAFF GAGES 3 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 0.00 feet Gage Height POINT OF ZERO FLOW 1.6 feet Gage Height EXTREME FOR PERIOD OF RECORD 5,952 cfs | 6.50 feet | 10/27/2000 FCDMC Annual Surface Water Report, Water Year 2020 Page 27 Watershed Map Agua Fria River at Grand Ave - water year peaks 7,000 Discharge (cfs) 6,000 5,000 4,000 3,000 2,000 1,000 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 28 2015 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/20/2019 11/29/2019 02/11/2020 02/22/2020 03/12/2020 03/13/2020 03/13/2020 03/18/2020 03/19/2020 Peak Gage Height 3.69 4.11 3.35 3.07 3.33 4.03 3.94 3.96 3.43 3.33 Peak Discharge (cfs) 168 308 87 23 79 277 243 251 109 79 Hydrograph of peak WY 2020 flow event, 11/20/2019 Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 29 Agua Fria River at Grand Avenue, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 1 8 1 9 10 1 11 3 6 12 11 13 92 14 7 15 16 17 18 12 19 15 20 27 21 2 1 22 8 23 24 2 25 1 26 27 1 28 29 8 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 38 6 1 12 145 0 0 0 0 0 0 MEAN 0 1 0 0 0 5 0 0 0 0 0 0 MAX 0 308 12 6 79 277 0 0 0 0 2 2 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 74 11 1 24 287 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 201 MEAN 1 MAX 308 MIN 0 AC_FT 398 FCDMC Annual Surface Water Report, Water Year 2020 Page 30 Agua Fria River at Buckeye Road, ID #85307 Site Data LOCATION On Buckeye Road east of Dysart Road DRAINAGE AREA 2,241 mi2 STREAM TYPE Channelized Natural Stream JURISDICTION Avondale, Arizona WATERSHED White Tanks A / Lower ACDC SECTION/TOWNSHIP/RANGE S14 T1N R1W LATITUDE N 33° 26' 06.3" | +33.43501 LONGITUDE W 112° 19' 55.8" | ‐112.33254 STREAMGAGE INSTALLATION DATE 10/12/1988 ‐ WY 1989 AVAILABLE PERIOD OF RECORD (POR) 10/12/1988 ‐ Current LENGTH OF AVAILABLE POR DATA 31.97 Years | 11,677 Days DATA GAPS IN POR 09/06/2003 ‐ 07/13/2004 STAGE GAGE ELEVATION 0.26 feet Gage Height STAFF GAGES 1 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 954.72 feet NAVD88 POINT OF ZERO FLOW 0.1 feet Gage Height EXTREME FOR PERIOD OF RECORD 10,274 cfs | 3.74 feet | 09/08/2014 EXTREME OUTSIDE PERIOD OF RECORD 44,200 cfs | 02/20/1980 FCDMC Annual Surface Water Report, Water Year 2020 Page 31 Watershed Map Agua Fria River at Buckeye Road - water year peaks 12,000 Discharge (cfs) 10,000 8,000 6,000 4,000 2,000 0 1985 1990 1995 2000 2005 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 32 2010 2015 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/22/2019 11/29/2019 11/30/2019 02/22/2020 03/13/2020 03/13/2020 Peak Gage Height (feet) 0.48 0.48 0.56 0.56 0.36 0.48 0.76 Peak Discharge (cfs) 373 373 649 649 124 373 1,739 Hydrograph of peak WY 2020 flow event, 03/13/2020 Flood Flow Frequency Flood Flow Frequency FEMA, 1995 2‐year 5‐year 10‐year 50‐year 100‐year 500‐year 22,000 69,000 95,000 184,000 FCDMC Annual Surface Water Report, Water Year 2020 Page 33 Agua Fria River at MC85, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 462 2 46 3 4 5 6 7 8 9 10 11 12 13 272 14 47 15 16 17 18 19 20 96 21 129 22 247 9 23 6 24 25 26 --27 28 29 144 30 404 --31 ---------------------------------------------------------------------------------------TOTAL 0 1027 508 0 9 319 0 0 0 0 0 0 MEAN 0 34 16 0 0 10 0 0 0 0 0 0 MAX 0 649 151 0 124 1739 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 2037 1007 0 19 632 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 1863 MEAN 5 MAX 1739 MIN 0 AC_FT 3695 FCDMC Annual Surface Water Report, Water Year 2020 Page 34 Amigos Wash, ID #80507 Site Data LOCATION Located in Usery Mountain Park, northeast of the intersection of McKellips and Crismon Roads DRAINAGE AREA 0.47 mi2 STREAM TYPE Natural Stream JURISDICTION Maricopa County, Arizona WATERSHED Lower Verde SECTION/TOWNSHIP/RANGE S01 T1N R7E LATITUDE N 33° 27' 16.8" | +33.45467 LONGITUDE W 111° 36' 24.4" | ‐111.60677 STREAMGAGE INSTALLATION DATE 01/09/2013 ‐ WY 2013 AVAILABLE PERIOD OF RECORD (POR) 01/09/2013 ‐ Current LENGTH OF AVAILABLE POR DATA 7.73 Years | 2,822 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.75 feet Gage Height STAFF GAGES None ZERO GAGE HEIGHT ELEVATION 1,783.87 feet NAVD88 POINT OF ZERO FLOW 0.1 feet Gage Height EXTREME FOR PERIOD OF RECORD 669 cfs | 2.05 feet | 08/10/2018 FCDMC Annual Surface Water Report, Water Year 2020 Page 35 Watershed Map Amigos Wash - water year peaks 800 Discharge (cfs) 700 600 500 400 300 200 100 0 2010 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 36 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No runoff recorded during Water Year 2020. Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 37 Amigos Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 38 Antelope Creek, ID #55207 Site Data LOCATION Located about 1.5 miles upstream from Martinez Creek (7013) DRAINAGE AREA 62 mi2 STREAM TYPE Natural Stream JURISDICTION Yavapai County, Arizona WATERSHED Lower Hassayampa SECTION/TOWNSHIP/RANGE S09 T8N R5W LATITUDE N 34° 02' 55.6" | +34.04877 LONGITUDE W 112° 46' 45.7" | ‐112.77937 STREAMGAGE INSTALLATION DATE 07/09/2003 ‐ WY 2003 AVAILABLE PERIOD OF RECORD (POR) 07/09/2003 ‐ Current LENGTH OF AVAILABLE POR DATA 17.23 Years | 6,294 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 2.00 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 2,406.00 feet NAVD88 POINT OF ZERO FLOW 1.4 feet Gage Height EXTREME FOR PERIOD OF RECORD 7,169 cfs | 5.42 feet | 10/20/2015 FCDMC Annual Surface Water Report, Water Year 2020 Page 39 Watershed Map Antelope Creek - water year peaks 8,000 Discharge (cfs) 7,000 6,000 5,000 4,000 3,000 2,000 1,000 0 2000 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 40 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/20/2019 11/21/2019 03/13/2020 03/14/2020 03/19/2020 Peak Gage Height (feet) 2.24 2.21 2.26 3.11 2.56 2.59 Peak Discharge (cfs) 122 109 129 756 259 277 Hydrograph of peak WY 2020 flow event, 03/13/2020 Flood Flow Frequency Flood Flow Frequency N=18, HEC‐WRC computation (based on 18 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 1,280 3,750 6,230 9,200 13,900 17,900 NOTE: These results are based on very limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 41 Antelope Creek, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 --2 --3 --4 5 6 7 8 9 10 11 12 13 97 14 35 15 16 17 18 19 108 20 11 21 7 22 23 24 25 --26 --27 --28 --29 --30 ----31 ---------------------------------------------------------------------------------------TOTAL 0 17 0 0 0 241 0 0 0 0 0 0 MEAN 0 1 0 0 0 8 0 0 0 0 0 0 MAX 0 129 0 0 0 756 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 35 0 0 0 477 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 258 MEAN 1 MAX 756 MIN 0 AC_FT 512 FCDMC Annual Surface Water Report, Water Year 2020 Page 42 Apache Junction FRS, ID #81307 Site Data LOCATION Located near Idaho Road and Lost Dutchman Boulevard DRAINAGE AREA 5.8 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Apache Junction, Arizona WATERSHED Lower Verde SECTION/TOWNSHIP/RANGE S08 T1N R8E LATITUDE N 33° 26' 29.2" | +33.44143 LONGITUDE W 111° 33' 06.4" | ‐111.55178 STREAMGAGE INSTALLATION DATE 09/15/1988 ‐ WY 1988 AVAILABLE PERIOD OF RECORD (POR) 09/15/1988 ‐ Current LENGTH OF AVAILABLE POR DATA 32.04 Years | 11,704 Days DATA GAPS IN POR None STAGE GAGE TYPE Pressure Transducer STAGE GAGE ELEVATION 0.13 feet Gage Height STAFF GAGES 5 ZERO GAGE HEIGHT ELEVATION 1,785.79 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height SPILLWAY ELEVATION 16.00 feet Gage Height TOP OF DAM ELEVATION 27.00 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 43 Watershed Map Apache Junction FRS - water year peaks Volume (acre-feet) 160 140 120 100 80 60 40 20 0 1985 1990 1995 2000 2005 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 44 2010 2015 2020 2025 WY2020 Events Date of Peak 11/29/2019 12/25/2019 Peak Gage Height (feet) 0.91 0.67 Peak Volume (ac‐ft) 0.1 0.0 Hydrograph of peak WY 2020 impoundment event, 11/29/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 45 Percent Spillway Capacity 0.0 0.0 Apache Junction FRS, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 5 1 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 5 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 46 Apache Junction FRS, volume data Volume, in acre feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 0 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 47 Apache Junction FRS, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 4 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 5 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 6 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 7 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 8 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 9 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 10 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 11 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 12 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 13 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 14 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 15 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 16 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 17 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 18 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 19 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 20 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 21 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 22 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 23 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 24 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 25 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 26 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 27 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 28 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 29 0.1 0.3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 30 0.1 0.1 0.1 0.1 --0.1 0.1 0.1 0.1 0.1 0.1 0.1 31 0.1 --0.1 0.1 --0.1 --0.1 --0.1 0.1 -------------------------------------------------------------------------------MEAN 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 MAX 0.1 0.9 0.7 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 MIN 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.13 MAX 0.91 MIN 0.13 FCDMC Annual Surface Water Report, Water Year 2020 Page 48 Apache Trail, ID #36507 Site Data LOCATION Located near the corner of Fourth Avenue and Royal Palm Road DRAINAGE AREA 0.35 mi2 STREAM TYPE Natural drainaged, encroached by development JURISDICTION Apache Junction, Arizona WATERSHED Upper EMF SECTION/TOWNSHIP/RANGE S21 T1N R8E LATITUDE N 33° 24’ 41.8" | +33.41161 LONGITUDE W 111° 32' 13.0" | ‐111.53695 STREAMGAGE INSTALLATION DATE 06/27/2019 ‐ WY 2020 AVAILABLE PERIOD OF RECORD (POR) 06/27/2019 – Current LENGTH OF AVAILABLE POR DATA 1.26 Years | 462 Days DATA GAPS IN POR 10/17/2019 – 11/04/2019 STAGE GAGE ELEVATION 0.00 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,732.24 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 480 cfs | 2.87 feet GH | 09/23/2019 NOTE: This station was removed and moved to a location about 300 feet upstream in November 2019. FCDMC Annual Surface Water Report, Water Year 2020 Page 49 Colt Rd BelaireRd Hopi Rd Location Map 50365 ! ! CactusRd 4th Ave Royal PalmRd 6th Ave Ol dW es tH wy Apache Trail Wash - water year peaks 600 Discharge (cfs) 500 400 300 200 100 0 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 50 2025 WY2020 Events Date of Peak 11/19/2019 11/20/2019 11/21/2019 11/29/2019 08/29/2020 Peak Gage Height 0.42 0.67 1.41 0.64 1.27 Peak Discharge (cfs) 9 16 51 15 44 Hydrograph of peak WY 2020 flow event, 11/21/2019 Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 51 Apache Trail, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 --2 --3 --4 --5 6 7 8 9 10 11 12 13 14 15 16 17 --18 --19 --20 --2 21 --2 22 --23 --24 --25 --26 --27 --28 --29 --1 1 30 ----31 -----------------------------------------------------------------------------------------TOTAL 0 5 0 0 0 0 0 0 0 0 2 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 51 0 0 0 0 0 0 0 0 44 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 10 0 0 0 0 0 0 0 0 3 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 7 MEAN 0 MAX 51 MIN 0 AC_FT 13 FCDMC Annual Surface Water Report, Water Year 2020 Page 52 Aspen Dam, ID #78707 Site Data LOCATION Near Aspen Drive and Golden Eagle Boulevard DRAINAGE AREA 2.13 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Fountain Hills, Arizona WATERSHED Lower Verde SECTION/TOWNSHIP/RANGE S16 T3N R6E LATITUDE N 33° 37' 33.1" | +33.62587 LONGITUDE W 111° 44' 47.3" | ‐111.74646 STREAMGAGE INSTALLATION DATE 01/02/1997 ‐ WY 1997 AVAILABLE PERIOD OF RECORD (POR) 01/02/1997 ‐ Current LENGTH OF AVAILABLE POR DATA 23.75 Years | 8,673 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.33 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,810.88 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY CREST ELEVATION 26.8 feet Gage Height TOP OF DAM ELEVATION 34.6 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 53 Watershed Map Volume (acre-feet) Aspen Dam - water year peaks 10 9 8 7 6 5 4 3 2 1 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 54 2015 2020 2025 WY2020 Events Date of Peak 12/09/2019 02/10/2020 Peak Gage Height (feet) 0.93 1.58 Peak Volume (ac‐ft) 0.0 0.2 Hydrograph of peak WY 2020 impoundment event, 02/10/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 55 Percent Spillway Capacity 0.0 0.4 Aspen Dam, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 3 11 12 --13 --14 --15 --16 --17 --18 --19 --20 --21 --22 --23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 1 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 12 0 23 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 1 0 2 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 1 MEAN 0 MAX 23 MIN 0 AC_FT 2 FCDMC Annual Surface Water Report, Water Year 2020 Page 56 Aspen Dam, volume data Volume, in acre feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 11 12 --13 --14 --15 --16 --17 --18 --19 --20 --21 --22 --23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 0 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 57 Aspen Dam, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 5 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 6 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 7 0.2 0.2 0.2 0.2 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 8 0.2 0.2 0.2 0.2 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 9 0.2 0.2 0.3 0.2 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 10 0.2 0.2 0.2 0.2 0.4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 11 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 12 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 13 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 14 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 15 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 16 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 17 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 18 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 19 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 20 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 21 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 22 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 23 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 24 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.0 0.2 0.2 25 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 26 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 27 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 28 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 29 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 30 0.2 0.2 0.2 0.2 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 31 0.2 --0.2 0.2 --0.2 --0.2 --0.2 0.2 -------------------------------------------------------------------------------MEAN 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 MAX 0.2 0.2 0.9 0.2 1.6 0.2 0.2 0.2 0.2 0.2 0.2 0.2 MIN 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.24 MAX 1.58 MIN 0.24 FCDMC Annual Surface Water Report, Water Year 2020 Page 58 Baseline Road at 43rd Avenue Basin, ID #66407 Site Data LOCATION Located on the basin at the northeast corner of Baseline Rd and 43rd Avenue DRAINAGE AREA Undetermined STREAM TYPE Flood control basin JURISDICTION Phoenix, Arizona WATERSHED South Mountain SECTION/TOWNSHIP/RANGE S34 T1N R2E LATITUDE N 33° 22' 47.2" | +33.37978 LONGITUDE W 112° 09' 02.5" | ‐112.15070 STREAMGAGE INSTALLATION DATE 10/01/2015 ‐ WY 2016 AVAILABLE PERIOD OF RECORD (POR) 10/01/2015 ‐ Current LENGTH OF AVAILABLE POR DATA 5.00 Years | 1,827 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.20 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,023.95 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY CREST ELEVATION No spillway TOP OF BASIN ELEVATION 10.5 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 59 Location Map Baseline Road at 43rd Avenue Basin - water year peaks Volume (acre-feet) 14 12 10 8 6 4 2 0 2015 2016 2017 2018 2019 2020 2021 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 60 2022 2023 2024 2025 WY2020 Events Date of Peak 11/19/2019 11/20/2019 11/21/2019 11/29/2019 02/11/2020 02/22/2020 03/11/2020 03/12/2020 03/13/2020 03/18/2020 Peak Gage Height (feet) 0.87 1.20 2.17 2.27 0.77 1.75 1.10 0.72 1.55 0.57 Peak Volume (ac‐ft) 0.0 0.0 0.3 0.5 0.0 0.0 0.0 0.0 0.0 0.0 Hydrograph of peak WY 2020 impoundment event, 11/29/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 61 Percent Spillway Capacity 0.0 0.0 0.8 1.3 0.0 0.0 0.0 0.0 0.0 0.0 Baseline Road at 43rd Avenue Basin, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 --30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 NOTE: No discharge rating exists for this site. FCDMC Annual Surface Water Report, Water Year 2020 Page 62 Baseline Road at 43rd Avenue Basin, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 1 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 1 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 63 Baseline Road at 43rd Avenue Basin, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 5 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 6 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 7 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 8 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 9 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 10 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 11 0.2 0.2 0.2 0.2 0.3 0.4 0.2 0.2 0.2 0.2 0.2 0.2 12 0.2 0.2 0.2 0.2 0.2 0.4 0.2 0.2 0.2 0.2 0.2 0.2 13 0.2 0.2 0.2 0.2 0.2 0.5 0.2 0.2 0.2 0.2 0.2 0.2 14 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 15 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 16 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 17 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 18 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 19 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 20 0.2 0.4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 21 0.2 0.6 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 22 0.2 0.2 0.2 0.2 0.5 0.2 0.2 0.2 0.2 0.2 0.2 0.2 23 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 24 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 25 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 26 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 27 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 28 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 29 0.2 0.6 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 30 0.2 0.2 0.2 0.2 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 31 0.2 --0.2 0.2 --0.2 --0.2 --0.2 0.2 -------------------------------------------------------------------------------MEAN 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 MAX 0.2 2.3 0.2 0.2 1.8 1.6 0.2 0.2 0.2 0.3 0.6 0.2 MIN 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.21 MAX 2.27 MIN 0.20 FCDMC Annual Surface Water Report, Water Year 2020 Page 64 Bender Wash, ID #40507 Site Data STATUS Active LOCATION Located about 8 miles east of Gila Bend on I‐8 DRAINAGE AREA 69.5 mi2 STREAM TYPE Natural Stream JURISDICTION Maricopa County, Arizona WATERSHED Lower Gila SECTION/TOWNSHIP/RANGE S15 T6S R3W LATITUDE N 32° 54' 22.9" | +32.90637 LONGITUDE W 112° 33' 11.1" | ‐112.55309 STREAMGAGE INSTALLATION DATE 05/12/2004 ‐ WY 2004 AVAILABLE PERIOD OF RECORD (POR) 05/12/2004 ‐ Current LENGTH OF AVAILABLE POR DATA 16.39 Years | 5,986 Days DATA GAPS IN POR 10/06/2015 – 05/22/2017 STAGE GAGE ELEVATION 1.20 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,200.21 feet NAVD88 POINT OF ZERO FLOW 0.5 feet Gage Height EXTREME FOR PERIOD OF RECORD 1,132 cfs | 5.20 feet | 08/13/2014 EXTREME OUTSIDE PERIOD OF RECORD 8,250 cfs | 10.78 feet | 09/07/2002 FCDMC Annual Surface Water Report, Water Year 2020 Page 65 Watershed Map Bender Wash - water year peaks 3,000 Discharge (cfs) 2,500 2,000 1,500 1,000 500 0 2000 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 66 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No runoff recorded in Water Year 2020. Flood Flow Frequency Flood Flow Frequency HEC‐WRC computation (based on data from 1963 – 1979, 1983, 1991 – 1996, 2004 ‐ 2020) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 64 477 1,250 2,660 5,960 9,940 NOTE: These results are based on limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 67 Bender Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 --15 --16 --17 --18 --19 --20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 68 Berneil Wash, ID #59207 Site Data LOCATION Near 66th Street and Doubletree Road DRAINAGE AREA 8.3 mi2 STREAM TYPE Engineered Channel JURISDICTION Paradise Valley, Arizona WATERSHED Lower Indian Bend SECTION/TOWNSHIP/RANGE S34 T3N R4E LATITUDE N 33° 33' 58.5" | +33.56626 LONGITUDE W 111° 56' 19.6" | ‐111.93878 STREAMGAGE INSTALLATION DATE 07/30/1998 ‐ WY 1998 AVAILABLE PERIOD OF RECORD (POR) 07/30/1998 ‐ Current LENGTH OF AVAILABLE POR DATA 22.17 Years | 8,099 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.00 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,314.56 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 1,634 cfs | 3.50 feet | 10/02/2018 FCDMC Annual Surface Water Report, Water Year 2020 Page 69 Watershed Map Berneil Wash - water year peaks 1,200 Discharge (cfs) 1,000 800 600 400 200 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 70 2015 2020 2025 Berniel Wash, WY2020 Events Date of Peak 11/20/2019 11/29/2019 12/24/2019 12/25/2019 12/27/2019 02/11/2020 02/22/2020 03/11/2020 03/12/2020 03/13/2020 03/13/2020 03/18/2020 Peak Gage Height (feet) 0.74 0.89 0.72 0.24 0.27 0.54 0.62 0.52 0.57 0.64 0.57 0.37 Peak Discharge (cfs) 149 191 144 33 40 98 118 93 105 123 105 62 Hydrograph of peak WY 2020 flow event, 11/29/2019 Flood Flow Frequency Flood Flow Frequency N=23, HEC‐WRC computation (based on 23 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 310 584 801 1,030 1,370 1,640 FCDMC Annual Surface Water Report, Water Year 2020 Page 71 Berneil Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 1 --9 --10 4 11 23 13 12 7 13 26 14 15 16 17 18 5 19 20 14 21 22 21 23 24 8 25 2 26 27 3 28 29 24 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 38 13 0 46 51 0 0 0 0 0 0 MEAN 0 1 0 0 2 2 0 0 0 0 0 0 MAX 0 191 144 0 118 123 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 76 27 0 91 102 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 149 MEAN 0 MAX 191 MIN 0 AC_FT 295 FCDMC Annual Surface Water Report, Water Year 2020 Page 72 Blue Tank Wash, ID #52707 Site Data LOCATION Located northeast of Wickenburg near Blue Tank Road crossing DRAINAGE AREA 9.3 mi2 STREAM TYPE Natural Stream JURISDICTION Yavapai County, Arizona WATERSHED Lower Hassayampa SECTION/TOWNSHIP/RANGE S29 T8N R4W LATITUDE N 34° 0’ 27.1" | +34.00753 LONGITUDE W 112° 41' 47.8" | ‐112.69660 STREAMGAGE INSTALLATION DATE 05/29/2019 ‐ WY 2020 AVAILABLE PERIOD OF RECORD (POR) 05/29/2019 – Current LENGTH OF AVAILABLE POR DATA 1.34 Years | 491 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 1.10 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 2,436.284 feet NAVD88 POINT OF ZERO FLOW 0.3 feet Gage Height EXTREME FOR PERIOD OF RECORD 180 cfs | 1.20 feet GH | 09/25/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 73 Location Map ash ank W Blue T 50527 ! ! la Ca mi ty sh Wa Discharge (cfs) Blue Tank Wash - water year peaks 200 180 160 140 120 100 80 60 40 20 0 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 74 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No runoff recorded in Water Year 2020 Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 75 Blue Tank Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 --14 --15 16 17 18 19 20 21 22 23 24 25 26 27 51 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 76 Box Wash, ID #47507 Site Data LOCATION Located about 3 miles northwest of Vulture Mine DRAINAGE AREA 5.9 mi2 STREAM TYPE Natural Stream JURISDICTION Maricopa County, Arizona WATERSHED Lower Hassayampa SECTION/TOWNSHIP/RANGE S20 T6N R5W LATITUDE N 33° 50' 57.4" | +33.84927 LONGITUDE W 112° 47' 56.8" | ‐112.79911 STREAMGAGE INSTALLATION DATE 03/11/2003 ‐ WY 2003 AVAILABLE PERIOD OF RECORD (POR) 03/11/2003 – Current LENGTH OF AVAILABLE POR DATA 17.56 Years | 6,414 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.20 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 2,256.15 feet NAVD88 POINT OF ZERO FLOW ‐0.3 feet Gage Height EXTREME FOR PERIOD OF RECORD 4,160 cfs | 5.65 feet | 07/18/2015 FCDMC Annual Surface Water Report, Water Year 2020 Page 77 Watershed Map Box Wash - water year peaks 4,500 Discharge (cfs) 4,000 3,500 3,000 2,500 2,000 1,500 1,000 500 0 2000 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 78 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Discharge (cfs) 08/30/2020 0.65 100 Hydrograph of peak WY 2020 flow event, 08/30/2020 Flood Flow Frequency Flood Flow Frequency N=18, HEC‐WRC computation (based on 18 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 75 615 1,520 2,900 5,490 7,970 NOTE: These results are based on very limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 79 Box Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 1 30 --1 31 ---------------------------------------------------------------------------------------TOTAL 0 1 0 0 0 0 0 0 0 0 1 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 81 0 0 0 0 0 0 0 0 100 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 3 0 0 0 0 0 0 0 0 2 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 2 MEAN 0 MAX 100 MIN 0 AC_FT 5 FCDMC Annual Surface Water Report, Water Year 2020 Page 80 Buckeye FRS #1, ID #44007 Site Data LOCATION Located near I‐10 and the Hassayampa River DRAINAGE AREA 74 mi2 Excluding structures 2 and 3 STREAM TYPE Dam of natural drainage JURISDICTION Maricopa County, Arizona WATERSHED Lower Hassyampa SECTION/TOWNSHIP/RANGE S03 T1N R5W LATITUDE N 33° 27' 27.9" | +33.45775 LONGITUDE W 112° 44' 59.9" | ‐112.74998 STREAMGAGE INSTALLATION DATE 07/26/1983 ‐ WY 1983 AVAILABLE PERIOD OF RECORD (POR) 11/23/1987 ‐ Current LENGTH OF AVAILABLE POR DATA 32.86 Years | 12,001 Days DATA GAPS IN POR 01/21/2010 ‐ 03/01/2010 STAGE GAGE ELEVATION 0.20 feet Gage Height STAFF GAGES 6 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,062.00 feet NAVD88 POINT OF ZERO FLOW (UNCONTROLLED OUTLET) 0.00 feet Gage Height SPILLWAY ELEVATION 18.7 feet Gage Height TOP OF DAM ELEVATION 27.5 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 81 Watershed Map Buckeye 1 3 2 Buckeye #1 FRS - water year peaks Volume (acre-feet) 700 600 500 400 300 200 100 0 1985 1990 1995 2000 2005 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 82 2010 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Volume (ac‐ft) No Impoundments Hydrograph of peak WY 2020 impoundment event There was no impoundment recorded in Water Year 2020. FCDMC Annual Surface Water Report, Water Year 2020 Page 83 Percent Spillway Capacity Buckeye FRS #1, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 --5 --6 --7 --8 --9 --10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 84 Buckeye FRS #1, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 --5 --6 --7 --8 --9 --10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 0 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 85 Buckeye FRS #1, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 2 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 3 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 4 0.5 0.5 0.5 0.5 0.5 0.5 0.5 --0.2 0.2 0.2 0.2 5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 --0.2 0.2 0.2 0.2 6 0.5 0.5 --0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 7 0.5 0.5 --0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 8 0.5 0.5 --0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 9 0.5 0.5 --0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 10 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 11 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 12 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 13 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 14 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 15 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 16 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 17 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 18 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 19 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 20 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 21 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 22 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 23 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 24 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 25 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 26 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 27 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 28 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 29 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 30 0.5 0.5 0.5 0.5 --0.5 0.5 0.5 0.2 0.2 0.2 0.2 31 0.5 --0.5 0.5 --0.5 --0.5 --0.2 0.2 -------------------------------------------------------------------------------MEAN 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 MAX 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 MIN 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.2 0.2 0.2 0.2 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.39 MAX 0.49 MIN 0.20 FCDMC Annual Surface Water Report, Water Year 2020 Page 86 Buckeye FRS #2, ID #44507 Site Data LOCATION Located north of I‐10 near Miller Road DRAINAGE AREA 5.7 mi2 Excluding structure 3 STREAM TYPE Dam of natural drainage JURISDICTION Buckeye, Arizona WATERSHED Lower Hassyampa SECTION/TOWNSHIP/RANGE S07 T1N R3W LATITUDE N 33° 26' 22.3" | +33.43954 LONGITUDE W 112° 35' 47.4" | ‐112.59650 STREAMGAGE INSTALLATION DATE 11/11/1992 ‐ WY 1993 AVAILABLE PERIOD OF RECORD (POR) 11/11/1992 ‐ Current LENGTH OF AVAILABLE POR DATA 27.89 Years | 10,186 Days DATA GAPS IN POR None STAGE GAGE ELEVATION ‐1.39 feet Gage Height STAFF GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,098.17 feet NAVD88 POINT OF ZERO FLOW ‐1.54 feet Gage Height SPILLWAY ELEVATION 15.0 feet Gage Height TOP OF DAM ELEVATION 20.43 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 87 Watershed Map Buckeye 3 Buckeye 2 Buckeye #2 FRS - water year peaks Volume (acre-feet) 250 200 150 100 50 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 88 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Volume (ac‐ft) None Hydrograph of peak WY 2020 impoundment event, No impoundments recorded in Water Year 2020. FCDMC Annual Surface Water Report, Water Year 2020 Page 89 Percent Spillway Capacity Buckeye FRS #2, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 2 13 3 14 2 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 7 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 1 1 0 0 0 29 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 1 0 0 0 0 13 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 7 MEAN 0 MAX 29 MIN 0 AC_FT 14 FCDMC Annual Surface Water Report, Water Year 2020 Page 90 Buckeye FRS #2, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 1 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 1 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 91 Buckeye FRS #2, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 2 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 3 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 5 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 6 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 7 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 8 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 9 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 10 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 11 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 12 -1.4 -1.4 -1.4 -1.4 -1.4 -1.2 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 13 -1.4 -1.4 -1.4 -1.4 -1.4 -0.8 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 14 -1.4 -1.4 -1.4 -1.4 -1.4 -1.1 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 15 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 16 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 17 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 18 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 19 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 20 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 21 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 22 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 23 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 24 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 25 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 26 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 27 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 28 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 29 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 30 -1.4 -1.4 -1.4 -1.4 --- -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 31 -1.4 --- -1.4 -1.4 --- -1.4 --- -1.4 --- -1.4 -1.4 -------------------------------------------------------------------------------MEAN -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 MAX -1.3 -1.3 -1.4 -1.4 -1.4 0.7 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 MIN -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -----------------------------------------------------------------------------WTR YR 2020 MEAN -1.39 MAX 0.71 MIN -1.39 FCDMC Annual Surface Water Report, Water Year 2020 Page 92 Buckeye FRS #3, ID #48807 Site Data LOCATION Located north of I‐10 near Watson Road DRAINAGE AREA 9.3 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Buckeye, Arizona WATERSHED Lower Hassyampa SECTION/TOWNSHIP/RANGE S10 T1N R3W LATITUDE N 33° 26' 49.5" | +33.44707 LONGITUDE W 112° 33' 21.4" | ‐112.55593 STREAMGAGE INSTALLATION DATE 11/23/1992 ‐ WY 1993 AVAILABLE PERIOD OF RECORD (POR) 11/23/1992 ‐ Current LENGTH OF AVAILABLE POR DATA 27.85 Years | 10,174 Days DATA GAPS IN POR None STAGE GAGE ELEVATION ‐4.08 feet Gage Height STAFF GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,151.03 Feet NAVD88 POINT OF ZERO FLOW ‐4.18 feet Gage Height SPILLWAY ELEVATION 14.00 feet Gage Height TOP OF DAM ELEVATION 20.30 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 93 Watershed Map Buckeye #3 FRS - water year peaks 180 Volume (acre-feet) 160 140 120 100 80 60 40 20 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 94 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Volume (ac‐ft) None Hydrograph of peak WY 2020 impoundment event, No impoundments recorded in Water Year 2020. FCDMC Annual Surface Water Report, Water Year 2020 Page 95 Percent Spillway Capacity Buckeye FRS #3, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 21 8 9 10 11 12 13 83 14 15 16 17 18 19 125 20 21 22 23 24 25 26 27 28 29 30 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 30 0 21 0 208 0 0 0 0 0 0 MEAN 0 1 0 1 0 7 0 0 0 0 0 0 MAX 0 767 0 317 0 987 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 59 0 42 0 412 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 258 MEAN 1 MAX 987 MIN 0 AC_FT 512 FCDMC Annual Surface Water Report, Water Year 2020 Page 96 Buckeye FRS #3, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 0 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 97 Buckeye FRS #3, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 2 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 3 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 4 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 5 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 6 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 7 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 8 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 9 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 10 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 11 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 12 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 13 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 14 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 15 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 16 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 17 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 18 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 19 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 20 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 21 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 22 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 23 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 24 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 25 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 26 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 27 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 28 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 29 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 30 -4.1 -4.1 -4.1 -4.1 --- -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 31 -4.1 --- -4.1 -4.1 --- -4.1 --- -4.1 --- -4.1 -4.1 -------------------------------------------------------------------------------MEAN -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 MAX -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.0 -4.1 -4.1 MIN -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -----------------------------------------------------------------------------WTR YR 2020 MEAN -4.08 MAX -4.04 MIN -4.08 FCDMC Annual Surface Water Report, Water Year 2020 Page 98 Bullard Wash at Indian School Road, ID #89507 Site Data LOCATION Located near Indian School Road and Wigwam Boulevard DRAINAGE AREA 14.6 mi2 STREAM TYPE Channelized natural stream JURISDICTION Goodyear, Arizona WATERSHED White Tanks A SECTION/TOWNSHIP/RANGE S29 T2N R1W LATITUDE N 33° 29' 32.7" | +33.49242 LONGITUDE W 112° 22' 54.1" | ‐112.38168 STREAMGAGE INSTALLATION DATE 06/27/2006 ‐ WY 2006 AVAILABLE PERIOD OF RECORD (POR) 06/27/2006 ‐ Current LENGTH OF AVAILABLE POR DATA 14.26 Years | 5,210 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.50 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,017.55 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 560 cfs | 2.68 feet | 09/27/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 99 Location Map Bullard Wash at Indian School Road - water year peaks 600 Discharge (cfs) 500 400 300 200 100 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 100 2020 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No runoff recorded in Water Year 2020. Flood Flow Frequency Flood Flow Frequency N=15, HEC‐WRC computation (based on 15 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 103 355 607 897 1,320 1,660 FCDMC Annual Surface Water Report, Water Year 2020 Page 101 Bullard Wash at Indian School Road, ID #6868 Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 102 Bullard Wash at Van Buren Street, ID #89207 Site Data LOCATION Located on Bullard Wash at Van Buren St. DRAINAGE AREA 88.3 mi2 STREAM TYPE Channelized natural stream JURISDICTION Goodyear, Arizona WATERSHED White Tanks B SECTION/TOWNSHIP/RANGE S05 T1N R1W LATITUDE N 33° 27' 0.4" | +33.4501 LONGITUDE W 112° 22' 58.0" | ‐112.38279 STREAMGAGE INSTALLATION DATE 12/13/2017 ‐ WY 2018 AVAILABLE PERIOD OF RECORD (POR) 12/13/2017 ‐ Current LENGTH OF AVAILABLE POR DATA 2.80 Years | 1,023 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.40 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 973.55 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD None recorded to date FCDMC Annual Surface Water Report, Water Year 2020 Page 103 Location Map W Van B u r en S t Discharge (cfs) Bullard Wash at Van Buren St. - water year peaks 100 90 80 70 60 50 40 30 20 10 0 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 104 2025 WY2020 Events Date of Peak Peak Gage Height None Hydrograph of peak WY 2020 flow event, No runoff recorded during Water Year 2020. Flood Flow Frequency There are not enough data to compute Flood Frequency. FCDMC Annual Surface Water Report, Water Year 2020 Page 105 Peak Discharge (cfs) Bullard Wash at Van Buren Street, ID #89207 Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 106 Camelback Road at 24th Avenue Basin, ID #6807 Site Data LOCATION Near Camelback Rd and 24th Ave DRAINAGE AREA Undetermined STREAM TYPE Flood control basin JURISDICTION Phoenix, Arizona WATERSHED Lower ACDC SECTION/TOWNSHIP/RANGE S13 T2N R2E LATITUDE N 33° 30' 35.5" | +33.50986 LONGITUDE W 112° 06' 37.8" | ‐112.11050 STREAMGAGE INSTALLATION DATE 10/01/2015 ‐ WY 2016 AVAILABLE PERIOD OF RECORD (POR) 10/01/2015 ‐ Current LENGTH OF AVAILABLE POR DATA 5.00 Years | 1,827 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.50 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,132.31 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY CREST ELEVATION No spillway TOP OF BASIN ELEVATION 6.4 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 107 Location Map Camelback Rd at 24th Avenue Basin - water year peaks Volume (acre-feet) 14 12 10 8 6 4 2 0 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 108 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Volume (ac‐ft) Percent Spillway Capacity 03/13/2020 0.82 3.3 12.6 Hydrograph of peak WY 2020 impoundment event, 03/13/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 109 Camelback Road at 24th Avenue Basin, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 --30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 NOTE: There is no discharge rating for this site at this time. FCDMC Annual Surface Water Report, Water Year 2020 Page 110 Camelback Road at 24th Avenue Basin, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 1 14 2 15 16 17 1 18 --19 --20 --21 22 23 1 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 2 0 0 0 0 3 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 3 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 111 Camelback Road at 24th Avenue Basin, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 2 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 3 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 4 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 6 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 7 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 8 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 9 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 10 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 11 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 12 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 13 0.5 0.5 0.5 0.5 0.5 0.6 0.5 0.5 0.5 0.5 0.5 0.5 14 0.5 0.5 0.5 0.5 0.5 0.6 0.5 0.5 0.5 0.5 0.5 0.5 15 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 16 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 17 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 18 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 --19 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 --20 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 --21 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 22 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 23 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 24 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 25 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 26 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 27 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 28 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 29 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 30 0.5 0.5 0.5 0.5 --0.5 0.5 0.5 0.5 0.5 0.5 0.5 31 0.5 --0.5 0.5 --0.5 --0.5 --0.5 0.5 -------------------------------------------------------------------------------MEAN 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 MAX 0.5 0.5 0.5 0.5 0.5 0.8 0.5 0.5 0.5 0.5 0.5 0.5 MIN 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.50 MAX 0.82 MIN 0.50 FCDMC Annual Surface Water Report, Water Year 2020 Page 112 CAP Reach #11 Dike #1, ID #8407 Site Data LOCATION Located on the CAP dike, about ½ mile west of Tatum Blvd. DRAINAGE AREA Undetermined STREAM TYPE Flood control dike JURISDICTION Phoenix, Arizona WATERSHED Upper Indian Bend SECTION/TOWNSHIP/RANGE S30 T4N R4E LATITUDE N 33° 39' 32.0" | +33.65890 LONGITUDE W 111° 58' 58.5" | ‐111.98293 STREAMGAGE INSTALLATION DATE 07/19/2016 ‐ WY 2016 AVAILABLE PERIOD OF RECORD (POR) 07/19/2016 ‐ Current LENGTH OF AVAILABLE POR DATA 4.20 Years | 1,535 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.00 feet Gage Height STAFF GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,526.00 feet NAVD88 POINT OF ZERO FLOW 2.00 feet Gage Height SPILLWAY CREST ELEVATION No spillway TOP OF BASIN ELEVATION 32.0 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 113 Watershed Map CAP Reach 11 Dike #1 - water year peaks Volume (acre-feet) 120 100 80 60 40 20 0 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 114 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Volume (ac‐ft) None Hydrograph of peak WY 2020 impoundment event, No impoundments recorded in Water Year 2020. FCDMC Annual Surface Water Report, Water Year 2020 Page 115 Percent Spillway Capacity CAP Reach 11 Dike #1, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 ----10 --11 --12 --13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 116 CAP Reach 11 Dike #1, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 ----10 --11 --12 --13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 0 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 117 CAP Reach 11 Dike #1, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 7 0.0 0.0 0.0 0.0 --0.0 0.0 0.0 0.0 0.0 0.0 0.0 8 0.0 0.0 0.0 0.0 --0.0 0.0 0.0 0.0 0.0 0.0 0.0 9 0.0 0.0 0.0 ----0.0 0.0 0.0 0.0 0.0 0.0 0.0 10 0.0 0.0 0.0 --0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 11 0.0 0.0 0.0 --0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 12 0.0 0.0 0.0 --0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 13 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 14 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 15 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 16 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 17 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 18 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 19 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 20 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 21 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 22 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 23 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 24 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 25 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 26 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 27 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 28 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 29 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 30 0.0 0.0 0.0 0.0 --0.0 0.0 0.0 0.0 0.0 0.0 0.0 31 0.0 --0.0 0.0 --0.0 --0.0 --0.0 0.0 -------------------------------------------------------------------------------MEAN 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 MAX 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 MIN 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.00 MAX 0.00 MIN 0.00 FCDMC Annual Surface Water Report, Water Year 2020 Page 118 CAP Reach #11, Dike #2, ID #58607 Site Data LOCATION Near the 60th Street alignment with the CAP canal. DRAINAGE AREA Undetermined STREAM TYPE Flood control dike JURISDICTION Phoenix, Arizona WATERSHED Upper Indian Bend SECTION/TOWNSHIP/RANGE S33 T4N R4E LATITUDE N 33° 38' 41.9" | +33.64498 LONGITUDE W 111° 56' 50.0" | ‐111.94721 STREAMGAGE INSTALLATION DATE 07/19/2016 ‐ WY 2016 AVAILABLE PERIOD OF RECORD (POR) 07/19/2016 ‐ Current LENGTH OF AVAILABLE POR DATA 4.20 Years | 1,535Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.00 feet Gage Height STAFF GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,520.50 feet NAVD88 POINT OF ZERO FLOW 2.00 feet Gage Height SPILLWAY CREST ELEVATION No spillway TOP OF BASIN ELEVATION 32.0 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 119 Watershed Map Volume (acre-feet) CAP Reach 11 Dike #2 - water year peaks 500 450 400 350 300 250 200 150 100 50 0 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 120 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Volume (ac‐ft) None Hydrograph of peak WY 2020 impoundment event, No impoundments recorded in Water Year 2020. FCDMC Annual Surface Water Report, Water Year 2020 Page 121 Percent Spillway Capacity CAP Reach 11 Dike #2, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 11 12 13 14 15 3 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 3 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 6 0 0 1 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 6 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 3 MEAN 0 MAX 6 MIN 0 AC_FT 6 FCDMC Annual Surface Water Report, Water Year 2020 Page 122 CAP Reach 11 Dike #2, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 426 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 1 MAX 426 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 123 CAP Reach 11 Dike #2, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 7 0.0 0.0 0.0 0.0 --0.0 0.0 0.0 0.0 0.0 0.0 0.0 8 0.0 0.0 0.0 0.0 --0.0 0.0 0.0 0.0 0.0 0.0 0.0 9 0.0 0.0 0.0 0.0 --0.0 0.0 0.0 0.0 0.0 0.0 0.0 10 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 11 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 12 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 13 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 14 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 15 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 16 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 17 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 18 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 19 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 20 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 21 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 22 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 23 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 24 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 25 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 26 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 27 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 28 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 29 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 30 0.0 0.0 0.0 0.0 --0.0 0.0 0.0 0.0 0.0 0.0 0.0 31 0.0 --0.0 0.0 --0.0 --0.0 --0.0 0.0 -------------------------------------------------------------------------------MEAN 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 MAX 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.3 0.0 0.0 0.1 MIN 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.00 MAX 0.30 MIN 0.00 FCDMC Annual Surface Water Report, Water Year 2020 Page 124 CAP Reach #11, Dike #3, ID #60107 Site Data LOCATION Near Hayden Road and the CAP DRAINAGE AREA Undetermined STREAM TYPE Flood control basin JURISDICTION Scottsdale, Arizona WATERSHED Upper Indian Bend SECTION/TOWNSHIP/RANGE S01 T3N R4E LATITUDE N 33° 38' 02.9" | +33.63414 LONGITUDE W 111° 54' 02.8" | ‐111.90079 STREAMGAGE INSTALLATION DATE 07/19/2016 ‐ WY 2016 AVAILABLE PERIOD OF RECORD (POR) 07/19/2016 ‐ Current LENGTH OF AVAILABLE POR DATA 4.20 Years | 1,535 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.00 feet Gage Height STAFF GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,519.60 feet NAVD88 POINT OF ZERO FLOW 2.00 feet Gage Height SPILLWAY CREST ELEVATION No spillway TOP OF BASIN ELEVATION 29.0 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 125 Watershed Map CAP Reach 11 Dike #3 - water year peaks Volume (acre-feet) 140 120 100 80 60 40 20 0 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 126 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Volume (ac‐ft) None Hydrograph of peak WY 2020 impoundment event, No impoundments recorded in Water Year 2020. FCDMC Annual Surface Water Report, Water Year 2020 Page 127 Percent Spillway Capacity CAP Reach 11 Dike #3, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 11 12 13 14 15 16 17 --18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 128 CAP Reach 11 Dike #3, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 11 12 13 14 15 16 17 --18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 107 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 107 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 129 CAP Reach 11 Dike #3, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 7 0.0 0.0 0.0 0.0 --0.0 0.0 0.0 0.0 0.0 0.0 0.0 8 0.0 0.0 0.0 0.0 --0.0 0.0 0.0 0.0 0.0 0.0 0.0 9 0.0 0.0 0.0 0.0 --0.0 0.0 0.0 0.0 0.0 0.0 0.0 10 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 11 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 12 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 13 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 14 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 15 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 16 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 17 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 --0.0 0.0 0.0 18 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 19 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 20 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 21 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 22 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 23 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 24 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 25 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 26 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 27 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 28 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 29 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 30 0.0 0.0 0.0 0.0 --0.0 0.0 0.0 0.0 0.0 0.0 0.0 31 0.0 --0.0 0.0 --0.0 --0.0 --0.0 0.0 -------------------------------------------------------------------------------MEAN 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 MAX 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 MIN 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.00 MAX 0.10 MIN 0.00 FCDMC Annual Surface Water Report, Water Year 2020 Page 130 CAP Reach #11, Dike #4, ID #59807 Site Data LOCATION Near the CAP and Thompson Peak Parkway DRAINAGE AREA Undetermined STREAM TYPE Flood control dike JURISDICTION Scottsdale, Arizona WATERSHED Upper Indian Bend SECTION/TOWNSHIP/RANGE S08 T3N R5E LATITUDE N 33° 37' 22.9" | +33.62304 LONGITUDE W 111° 52' 02.1" | ‐111.86725 STREAMGAGE INSTALLATION DATE 07/19/2016 ‐ WY 2016 AVAILABLE PERIOD OF RECORD (POR) 07/19/2016 ‐ Current LENGTH OF AVAILABLE POR DATA 4.20 Years | 1,535 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.00 feet Gage Height STAFF GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,510.00 feet NAVD88 POINT OF ZERO FLOW 2.00 feet Gage Height SPILLWAY CREST ELEVATION No spillway TOP OF BASIN ELEVATION 34.0 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 131 Watershed Map Volume (acre-feet) CAP Reach 11 Dike #4 - water year peaks 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 No impoundments recorded to date 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 132 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Volume (ac‐ft) None Hydrograph of peak WY 2020 impoundment event No impoundments were recorded during Water Year 2020. FCDMC Annual Surface Water Report, Water Year 2020 Page 133 Percent Spillway Capacity CAP Reach 11 Dike #4, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 134 CAP Reach 11 Dike #4, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 149 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 135 CAP Reach 11 Dike #4, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 8 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 9 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 10 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 11 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 12 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 13 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 14 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 15 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 16 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 17 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 18 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 19 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 20 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 21 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 22 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 23 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 24 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 25 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 26 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 27 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 28 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 29 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 30 0.0 0.0 0.0 0.0 --0.0 0.0 0.0 0.0 0.0 0.0 0.0 31 0.0 --0.0 0.0 --0.0 --0.0 --0.0 0.0 -------------------------------------------------------------------------------MEAN 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 MAX 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 MIN 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.00 MAX 0.10 MIN 0.00 FCDMC Annual Surface Water Report, Water Year 2020 Page 136 Casandro Wash, ID #52007 Site Data LOCATION Located near the intersection of Lazy Fox Road and US 60 DRAINAGE AREA 0.58 mi2 STREAM TYPE Culvert / Natural Stream JURISDICTION Wickenburg, Arizona WATERSHED Lower Hassayampa SECTION/TOWNSHIP/RANGE S10 T7N R5W LATITUDE N 33° 57' 43.3" | +33.96204 LONGITUDE W 112° 45' 55.0" | ‐112.76528 STREAMGAGE INSTALLATION DATE 07/12/1994 ‐ WY 1994 AVAILABLE PERIOD OF RECORD (POR) 07/12/1994 ‐ Current LENGTH OF AVAILABLE POR DATA 26.22 Years | 9,578 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.73 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 2,241.74 feet NAVD88 POINT OF ZERO FLOW 1.23 feet Gage Height EXTREME FOR PERIOD OF RECORD 668 cfs | 8.00 feet | 07/18/2015 FCDMC Annual Surface Water Report, Water Year 2020 Page 137 Watershed Map Casandro Wash - water year peaks 800 Discharge (cfs) 700 600 500 400 300 200 100 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 138 2015 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/29/2019 03/13/2020 Peak Gage Height (feet) 2.05 3.52 1.98 Peak Discharge (cfs) 88 214 83 Hydrograph of peak WY 2020 flow event, 11/29/2019 Flood Flow Frequency Flood Flow Frequency N=27, HEC‐WRC computation (based on 27 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 113 274 419 583 826 1,030 NOTE: These results are based on limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 139 Casandro Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 1 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 7 0 0 0 2 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 214 0 0 0 83 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 18 0 0 0 4 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 4 MEAN 0 MAX 214 MIN 0 AC_FT 22 FCDMC Annual Surface Water Report, Water Year 2020 Page 140 Casandro Dam, ID #53007 Site Data LOCATION In Wickenburg north and west of US 60 and Mariposa Avenue DRAINAGE AREA 1.2 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Wickenburg, Arizona WATERSHED Lower Hassayampa SECTION/TOWNSHIP/RANGE S11 T7N R5W LATITUDE N 33° 58' 02.8" | +33.96744 LONGITUDE W 112° 44' 54.7" | ‐112.74853 STREAMGAGE INSTALLATION DATE 08/15/1996 ‐ WY 1996 AVAILABLE PERIOD OF RECORD (POR) 08/15/1996 ‐ Current LENGTH OF AVAILABLE POR DATA 24.13 Years | 8,813 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.19 feet Gage Height STAFF GAGES 5 ZERO GAGE HEIGHT ELEVATION 2,136.66 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY ELEVATION 20.34 feet Gage Height TOP OF DAM ELEVATION 28.75 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 141 Watershed Map Casandro Wash Dam - water year peaks Volume (acre-feet) 120 100 80 60 40 20 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 142 2015 2020 2025 WY2020 Events Date of Peak 11/29/2019 03/12/2020 Peak Gage Height (feet) 6.21 2.21 Peak Volume (ac‐ft) 9.7 1.5 Hydrograph of peak WY 2020 impoundment event, 11/29/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 143 Percent Spillway Capacity 8.0 1.3 Casandro Dam, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 1 13 --14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 7 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 7 0 0 0 1 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 16 0 0 0 7 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 13 0 0 0 2 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 8 MEAN 0 MAX 16 MIN 0 AC_FT 16 FCDMC Annual Surface Water Report, Water Year 2020 Page 144 Casandro Dam, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 --14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 3 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 10 0 0 0 1 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 10 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 145 Casandro Dam, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 5 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 6 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 7 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 8 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 9 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 10 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 11 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 12 0.2 0.2 0.2 0.2 0.2 0.6 0.2 0.2 0.2 0.2 0.2 0.2 13 --0.2 0.2 0.2 0.2 0.6 0.2 0.2 0.2 0.2 0.2 0.2 14 0.2 0.2 0.2 0.2 0.2 0.4 0.2 0.2 0.2 0.2 0.2 0.2 15 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 16 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 17 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 18 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 19 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 20 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 21 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 22 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 23 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 24 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 25 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 26 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 27 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 28 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 29 0.2 2.6 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 30 0.2 0.4 0.2 0.2 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 31 0.2 --0.2 0.2 --0.2 --0.2 --0.2 0.2 -------------------------------------------------------------------------------MEAN 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 MAX 0.2 6.2 0.2 0.2 0.2 2.2 0.2 0.2 0.2 0.2 0.2 0.2 MIN 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.20 MAX 6.21 MIN 0.19 FCDMC Annual Surface Water Report, Water Year 2020 Page 146 Cave Buttes Dam Pool, ID #19517 Site Data LOCATION Located about 1 mile west of Cave Creek Road and 1/2 mile south of Jomax Road DRAINAGE AREA 191 mi2 STREAM TYPE Dam on natural drainage JURISDICTION Phoenix, Arizona WATERSHED Cave Creek SECTION/TOWNSHIP/RANGE S03 T4N R3E LATITUDE N 33° 43' 01.3" | +33.71702 LONGITUDE W 112° 02' 40.2" | ‐112.04451 STREAMGAGE INSTALLATION DATE 01/25/1984 ‐ WY 1984 AVAILABLE PERIOD OF RECORD (POR) 10/01/1987 ‐ Current LENGTH OF AVAILABLE POR DATA 33.00 Years | 12,054 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 1.90 feet Gage Height STAFF GAGES 24 ZERO GAGE HEIGHT ELEVATION 1,562.30 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY ELEVATION 97.1 feet Gage Height TOP OF DAM ELEVATION 119.1 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 147 Watershed Map Volume (acre-feet) Cave Buttes Dam Pool - water year peaks 20,000 18,000 16,000 14,000 12,000 10,000 8,000 6,000 4,000 2,000 0 1985 1990 1995 2000 2005 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 148 2010 2015 2020 2025 WY2020 Events Date of Peak 11/21/2019 11/30/2019 03/13/2020 Peak Gage Height (feet) 11.49 13.08 6.46 Peak Volume (ac‐ft) 45.2 88.4 3.3 Hydrograph of peak WY 2020 impoundment event, 11/30/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 149 Percent Spillway Capacity 0.1 0.2 0.0 Cave Buttes Dam Pool, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 3 21 18 22 23 24 25 26 27 28 29 24 30 56 --31 ---------------------------------------------------------------------------------------MEAN 0 3 0 0 0 0 0 0 0 0 0 0 MAX 0 88 5 0 0 3 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 88 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 150 Cave Buttes Dam Pool, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 1.9 1.9 2.6 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 2 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 3 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 4 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 5 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 6 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 7 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 8 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 10 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 11 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 12 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 13 1.9 1.9 1.9 1.9 1.9 2.7 1.9 1.9 1.9 1.9 1.9 1.9 14 1.9 1.9 1.9 1.9 1.9 2.0 1.9 1.9 1.9 1.9 1.9 1.9 15 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 16 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 17 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 18 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 19 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 20 1.9 3.7 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 21 1.9 9.4 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 22 1.9 2.0 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 23 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 24 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 25 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 26 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 27 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 28 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 29 1.9 7.4 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 30 1.9 11.6 1.9 1.9 --1.9 1.9 1.9 1.9 1.9 1.9 1.9 31 1.9 --1.9 1.9 --1.9 --1.9 --1.9 1.9 -------------------------------------------------------------------------------MEAN 1.9 2.7 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 MAX 1.9 13.1 7.5 1.9 1.9 6.5 1.9 1.9 1.9 1.9 1.9 1.9 MIN 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 -----------------------------------------------------------------------------WTR YR 2020 MEAN 1.97 MAX 13.08 MIN 1.90 FCDMC Annual Surface Water Report, Water Year 2020 Page 151 Cave Buttes Dam Outlet, ID #19507 Site Data LOCATION Located about 1 mile west of Cave Creek Road and 1/2 mile south of Jomax Road DRAINAGE AREA 191 mi2 STREAM TYPE Engineered Channel JURISDICTION Phoenix, Arizona WATERSHED Upper ACDC SECTION/TOWNSHIP/RANGE S03 T4N R3E LATITUDE N 33° 43' 01.3" | +33.71702 LONGITUDE W 112° 02' 40.2" | ‐112.04451 STREAMGAGE INSTALLATION DATE 01/25/1984 ‐ WY 1984 AVAILABLE PERIOD OF RECORD (POR) 07/30/1992 ‐ Current LENGTH OF AVAILABLE POR DATA 28.17 Years | 10,290 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.83 feet Gage Height STAFF GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,558.10 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 522 cfs | 6.43 feet | 08/24/1992 FCDMC Annual Surface Water Report, Water Year 2020 Page 152 Watershed Map Cave Buttes Dam Outlet - water year peaks 450 Discharge (cfs) 400 350 300 250 200 150 100 50 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 153 2015 2020 2025 WY2020 Events Date of Peak 11/21/2019 11/29/2019 03/14/2020 Peak Gage Height 3.86 3.92 4.14 Peak Discharge (cfs) 88 92 104 Hydrograph of peak WY 2020 flow event, 03/14/2020 Flood Flow Frequency Flows past this gage are regulated by Cave Buttes Dam directly upstream. Flood Flow Frequency is therefore not valid. FCDMC Annual Surface Water Report, Water Year 2020 Page 154 Cave Buttes Dam Outlet, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 10 2 3 4 5 6 7 8 9 10 11 12 13 44 14 103 15 89 16 1 17 18 19 20 22 21 82 22 3 23 24 25 26 27 28 29 52 30 82 --31 ---------------------------------------------------------------------------------------TOTAL 0 240 10 0 0 237 0 0 0 0 0 0 MEAN 0 8 0 0 0 8 0 0 0 0 0 0 MAX 0 92 63 0 0 104 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 476 19 0 0 469 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 486 MEAN 1 MAX 104 MIN 0 AC_FT 964 FCDMC Annual Surface Water Report, Water Year 2020 Page 155 Cave Creek at Ashdale Ranger Station, ID #21307 Site Data LOCATION About 1 mile west of the Seven Springs Campgrounds DRAINAGE AREA 33 mi2 STREAM TYPE Natural Stream JURISDICTION Maricopa County, Arizona WATERSHED Cave Creek SECTION/TOWNSHIP/RANGE S07 T7N R5E LATITUDE N 33° 57' 44.2" | +33.96228 LONGITUDE W 111° 52' 33.8" | ‐111.87605 STREAMGAGE INSTALLATION DATE 02/25/2009 ‐ WY 2009 AVAILABLE PERIOD OF RECORD (POR) 02/25/2009 ‐ Present LENGTH OF AVAILABLE POR DATA 11.60 Years | 4,236 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 1.24 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 3,256.78 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 8,735 cfs | 11.24 feet GH | 08/19/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 156 Watershed Map Discharge (cfs) Cave Creek at Ashdale RS - water year peaks 10,000 9,000 8,000 7,000 6,000 5,000 4,000 3,000 2,000 1,000 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 157 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/29/2019 12/24/2019 12/25/2019 12/27/2019 03/13/2020 03/13/2020 03/18/2020 Peak Gage Height 2.33 6.39 1.61 2.28 1.93 6.77 4.60 1.88 Peak Discharge (cfs) 96 1,807 58 93 74 2,058 722 71 Hydrograph of peak WY 2020 flow event, 03/13/2020 Flood Flow Frequency Flood Flow Frequency N=12, HEC‐WRC computation (based on 12 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 917 4,390 7,860 11,500 15,900 18,800 NOTE: Data based on very limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 158 Cave Creek at Ashdale RS, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 --2 3 4 5 6 7 8 9 10 10 11 12 34 13 453 14 55 15 16 17 18 10 19 42 20 21 21 22 23 24 10 25 47 26 --10 27 --21 28 --29 267 30 ----31 ---------------------------------------------------------------------------------------TOTAL 0 284 88 0 10 594 0 0 0 0 0 0 MEAN 0 9 3 0 0 19 0 0 0 0 0 0 MAX 0 1807 93 0 41 2058 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 563 175 0 20 1178 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 976 MEAN 3 MAX 2058 MIN 0 AC_FT 1936 FCDMC Annual Surface Water Report, Water Year 2020 Page 159 Cave Creek at Spur Cross, ID #20707 Site Data LOCATION Near the Spur Cross Conservation Area DRAINAGE AREA 72.9 mi2 STREAM TYPE Natural Stream JURISDICTION Cave Creek, Arizona WATERSHED Cave Creek SECTION/TOWNSHIP/RANGE S04 T6N R4E LATITUDE N 33° 53' 16.6" | +33.88793 LONGITUDE W 111° 57' 12.8" | ‐111.95355 STREAMGAGE INSTALLATION DATE 06/16/1993 ‐ WY 1993 AVAILABLE PERIOD OF RECORD (POR) 06/16/1993 ‐ Current LENGTH OF AVAILABLE POR DATA 27.29 Years | 9,969 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 2.64 feet Gage Height STAFF GAGES 2 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 2,260.03 feet NAVD88 POINT OF ZERO FLOW 2.3 feet Gage Height EXTREME FOR PERIOD OF RECORD 14,000 cfs | 16.40 feet | 09/03/2005 FCDMC Annual Surface Water Report, Water Year 2020 Page 160 Watershed Map Cave Creek near Spur Cross - water year peaks 16,000 Discharge (cfs) 14,000 12,000 10,000 8,000 6,000 4,000 2,000 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 161 2015 2020 2025 WY2020 Events Date of Peak 11/29/2019 12/25/2019 12/27/2019 02/11/2020 02/23/2020 03/13/2020 03/13/2020 03/19/2020 03/19/2020 Peak Gage Height (feet) 7.98 5.05 4.64 3.83 3.76 8.33 6.96 4.49 4.35 Peak Discharge (cfs) 1,974 317 206 60 52 2,248 1,282 171 142 Hydrograph of peak WY 2020 flow event, 03/13/2020 Flood Flow Frequency Flood Flow Frequency N=40, HEC‐WRC computation (based on 40 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 878 3,190 6,150 10,500 18,900 27,900 NOTE: These results are based on limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 162 Cave Creek at Spur Cross, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 1 1 48 36 15 17 44 20 6 2 3 1 2 1 1 30 32 16 17 44 19 5 2 3 1 3 1 1 27 25 16 17 43 18 4 3 3 1 4 1 1 31 23 16 16 43 18 3 3 2 1 5 1 1 27 20 16 16 43 19 3 3 3 1 6 1 1 24 20 16 15 43 16 2 3 3 1 7 1 1 21 19 16 15 42 15 2 3 3 1 8 1 1 27 18 16 15 43 15 2 3 2 1 9 1 1 30 16 16 15 42 14 2 3 3 1 10 1 1 9 14 16 15 41 14 2 3 3 1 11 1 1 26 14 37 23 41 13 2 2 2 1 12 1 1 24 14 25 70 40 12 2 3 3 1 13 1 1 23 17 20 810 41 9 2 3 2 1 14 1 1 22 21 19 225 42 11 2 3 1 1 15 1 1 22 20 17 87 40 11 2 3 1 1 16 1 1 20 20 17 56 38 11 2 3 1 1 17 1 1 19 20 16 43 39 12 2 3 1 1 18 1 1 20 20 16 41 36 10 2 3 1 1 19 1 1 19 19 15 117 34 9 2 2 1 1 20 1 1 18 19 15 56 35 7 2 3 1 1 21 1 1 18 20 15 1 33 8 2 3 1 1 22 1 7 18 20 20 1 34 8 3 3 1 1 23 1 4 18 20 45 1 33 8 2 3 1 1 24 1 1 32 19 35 31 32 8 2 2 1 1 25 1 1 154 19 26 54 29 8 2 3 1 1 26 1 1 110 17 22 52 28 9 3 3 1 1 27 1 1 151 16 20 48 27 8 3 3 1 1 28 1 1 143 16 19 48 22 8 2 3 1 1 29 1 403 87 16 18 46 23 8 2 3 1 1 30 1 104 60 16 --43 23 8 2 3 1 1 31 1 --43 16 --44 --7 --3 1 -------------------------------------------------------------------------------TOTAL 31 541 1323 602 576 2054 1093 362 77 84 51 27 MEAN 1 18 43 19 20 66 36 12 3 3 2 1 MAX 1 1974 317 36 60 2248 50 23 7 4 4 1 MIN 1 1 1 13 14 1 20 6 1 1 1 1 AC_FT 61 1074 2623 1194 1143 4074 2169 718 153 166 102 53 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 6821 MEAN 19 MAX 2248 MIN 1 AC_FT 13530 FCDMC Annual Surface Water Report, Water Year 2020 Page 163 Cave Creek, ID #19007 Site Data LOCATION In Cave Creek near Rancho Manana DRAINAGE AREA 115.8 mi2 STREAM TYPE Natural Stream JURISDICTION Cave Creek, Arizona WATERSHED Cave Creek SECTION/TOWNSHIP/RANGE S29 T6N R4E LATITUDE N 33° 49' 48.9" | +33.83024 LONGITUDE W 111° 58' 04.0" | ‐111.96778 STREAMGAGE INSTALLATION DATE 05/28/2003 ‐ WY 2002 AVAILABLE PERIOD OF RECORD (POR) 05/28/2003 ‐ Current LENGTH OF AVAILABLE POR DATA 17.35 Years | 6,336 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.25 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,989.20 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height EXTREME FOR PERIOD OF RECORD 17,190 cfs | 12.75 feet | 08/19/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 164 Watershed Map Discharge (cfs) Cave Creek - water year peaks 20,000 18,000 16,000 14,000 12,000 10,000 8,000 6,000 4,000 2,000 0 2000 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 165 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/29/2019 12/25/2019 03/13/2020 07/24/2020 Peak Gage Height (feet) 4.79 6.07 2.15 6.15 1.47 Peak Discharge (cfs) 756 2,164 77 2,304 12 Hydrograph of peak WY 2020 flow event, 03/13/2020 Flood Flow Frequency Flood Flow Frequency N=18, HEC‐WRC computation (based on 18 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 1,840 5,260 9,410 15,400 27,500 40,800 NOTE: These results are based on limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 166 Cave Creek, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 7 1 2 2 2 2 5 1 2 2 2 3 5 1 2 2 2 4 7 1 2 2 2 5 5 1 2 2 2 6 3 1 2 2 2 7 3 1 2 2 2 8 4 1 2 2 2 9 6 1 2 2 2 10 3 1 2 2 2 11 3 1 2 2 2 12 2 1 2 2 2 13 3 1 2 347 2 14 2 1 2 158 2 15 3 1 2 12 2 16 1 1 2 2 2 17 1 1 2 2 2 18 2 1 2 2 2 19 1 1 2 2 2 20 96 4 1 2 2 2 21 19 6 1 2 2 2 22 9 5 1 2 2 2 23 4 3 1 2 2 2 24 1 5 1 2 2 2 25 20 1 2 2 2 26 12 1 2 2 2 27 14 1 2 2 2 28 12 1 2 2 2 29 222 6 1 2 2 30 19 5 1 --2 31 --1 2 --2 -----------------------------------------------------------------------------------TOTAL 0 370 158 32 58 573 56 0 0 0 0 0 MEAN 0 13 5 1 2 18 2 0 0 0 0 0 MAX 0 2164 77 2 2 2304 2 0 0 12 0 0 MIN 0 0 0 1 2 2 0 0 0 0 0 0 AC_FT 0 733 313 63 115 1136 111 0 0 1 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 1247 MEAN 3 MAX 2304 MIN 0 AC_FT 2473 FCDMC Annual Surface Water Report, Water Year 2020 Page 167 Cave Creek near Cave Creek, ID #20507 Site Data LOCATION About 1 mile south of Carefree Highway DRAINAGE AREA 123.4 mi2 STREAM TYPE Natural Stream JURISDICTION Phoenix, Arizona WATERSHED Cave Creek SECTION/TOWNSHIP/RANGE S12 T5N R3E LATITUDE N 33° 47' 09.0" | +33.78582 LONGITUDE W 112° 00' 26.1" | ‐112.00726 STREAMGAGE INSTALLATION DATE 05/27/1994 ‐ WY 1994 (USGS gaged since 1958) AVAILABLE PERIOD OF RECORD (POR) 05/27/1994 ‐ Current LENGTH OF AVAILABLE POR DATA 26.35 Years | 9,624 Days DATA GAPS IN POR 11/30/2009 ‐ 06/16/2010 | 09/08/2013 ‐ 10/28/2013 STAGE GAGE ELEVATION 0.00 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,801.90 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height EXTREME FOR PERIOD OF RECORD (FCD) 15,850 cfs | 10.65 feet | 08/19/2014 EXTREME FOR PERIOD OF RECORD (USGS) 13,800 cfs | 10.7 feet | 01/08/1993 FCDMC Annual Surface Water Report, Water Year 2020 Page 168 Watershed Map Cave Creek near Cave Creek ‐ water year peaks 18,000 16,000 Discharge (cfs) 14,000 12,000 10,000 8,000 6,000 4,000 2,000 0 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 2025 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 169 WY2020 Events Date of Peak 11/20/2019 11/29/2019 12/25/2019 03/13/2020 Peak Gage Height (feet) 2.58 3.45 0.91 3.40 Peak Discharge (cfs) 823 1,491 159 1,449 Hydrograph of peak WY 2020 flow event, 11/29/2019 Flood Flow Frequency Flood Flow Frequency N=62, HEC‐WRC computation (based on 62 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 1,210 3,830 6,880 11,100 18,800 26,600 FCDMC Annual Surface Water Report, Water Year 2020 Page 170 Cave Creek near Cave Creek, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 463 14 100 15 16 17 18 19 20 144 21 20 22 23 24 25 19 26 27 28 29 324 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 489 19 0 0 564 0 0 0 0 0 0 MEAN 0 16 1 0 0 18 0 0 0 0 0 0 MAX 0 1491 159 0 0 1449 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 969 37 0 0 1118 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 1071 MEAN 3 MAX 1491 MIN 0 AC_FT 2124 FCDMC Annual Surface Water Report, Water Year 2020 Page 171 Cave Creek at CAP, ID #19807 Site Data LOCATION Located about 1 mile downstream of Cave Buttes Dam DRAINAGE AREA 198 mi2 STREAM TYPE Concrete Overchute JURISDICTION Phoenix, Arizona WATERSHED Upper ACDC SECTION/TOWNSHIP/RANGE S16 T4N R3E LATITUDE N 33° 41' 38.0" | +33.69389 LONGITUDE W 112° 03' 04.0" | ‐112.05111 STREAMGAGE INSTALLATION DATE 04/14/2014 ‐ WY 2014 AVAILABLE PERIOD OF RECORD (POR) 04/14/2014 ‐ Current LENGTH OF AVAILABLE POR DATA 6.47 Years | 2,362 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.10 feet Gage Height STAFF GAGES None CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,505.66 feet NGVD29 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 438 cfs | 0.92 feet | 08/20/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 172 Watershed Map Discharge (cfs) Cave Creek at CAP - water year peaks 500 450 400 350 300 250 200 150 100 50 0 2010 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 173 2025 WY2020 Events Date of Peak 11/21/2019 11/30/2019 03/14/2020 Peak Gage Height 0.59 0.72 0.74 Peak Discharge (cfs) 233 310 322 Hydrograph of peak WY 2020 flow event, 03/14/2020 Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 174 Cave Creek at CAP, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 44 2 3 4 5 6 7 8 9 10 11 12 13 98 14 284 15 267 16 21 17 18 19 20 46 21 231 22 25 23 24 25 26 27 28 29 135 30 247 --31 ---------------------------------------------------------------------------------------TOTAL 0 683 44 0 0 670 0 0 0 0 0 0 MEAN 0 23 1 0 0 22 0 0 0 0 0 0 MAX 0 310 123 0 0 322 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 1354 86 0 0 1328 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 1396 MEAN 4 MAX 322 MIN 0 AC_FT 2769 FCDMC Annual Surface Water Report, Water Year 2020 Page 175 Cave Creek at Cactus Road – ID #11807 Site Data LOCATION Near Cactus Road and 25th Avenue DRAINAGE AREA 33.6 mi2 below Cave Buttes Dam STREAM TYPE Basin / Outlet / Weir JURISDICTION Phoenix, Arizona WATERSHED Upper ACDC SECTION/TOWNSHIP/RANGE S13 T3N R2E LATITUDE N 33° 35' 58.9" | +33.59969 LONGITUDE W 112° 06' 43.2" | ‐112.11201 STREAMGAGE INSTALLATION DATE 06/27/1991 ‐ WY 1991 AVAILABLE PERIOD OF RECORD (POR) 06/27/1991 ‐ Current LENGTH OF AVAILABLE POR DATA 29.26 Years | 10,689 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.35 feet Gage Height STAFF GAGES 2 ZERO GAGE HEIGHT ELEVATION 1,259.36 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 3,247 cfs | 12.85 feet | 08/03/2005 FCDMC Annual Surface Water Report, Water Year 2020 Page 176 Watershed Map Cave Creek at Cactus - water year peaks 3,500 Discharge (cfs) 3,000 2,500 2,000 1,500 1,000 500 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 177 2015 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/22/2019 11/29/2019 12/01/2019 12/25/2019 12/28/2019 02/11/2020 02/22/2020 03/13/2020 Peak Gage Height (feet) 10.41 7.70 7.82 7.97 3.39 1.94 4.28 6.18 10.27 Peak Discharge (cfs) 432 204 206 209 90 33 123 174 356 Hydrograph of peak WY 2020 flow event, 11/20/2019 Flood Flow Frequency Flood Flow Frequency N=29, HEC‐WRC computation (based on 29 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 463 1,050 1,670 2,510 4,050 5,650 NOTE: These results are based on limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 178 Cave Creek at Cactus Road, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 182 2 36 3 4 5 6 7 8 9 10 11 49 20 12 100 13 207 14 203 15 242 16 196 17 89 18 33 19 49 20 152 19 21 167 1 22 176 87 23 68 62 24 3 4 25 48 26 25 27 1 28 20 29 120 30 167 --31 ---------------------------------------------------------------------------------------TOTAL 2 854 311 0 202 1160 0 0 0 0 0 0 MEAN 0 28 10 0 7 37 0 0 0 0 0 0 MAX 4 432 208 0 174 356 0 0 0 0 0 0 MIN --0 0 0 0 0 0 0 0 0 0 0 AC_FT 4 1693 616 0 400 2300 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 2528 MEAN 7 MAX 432 MIN 0 AC_FT 5014 FCDMC Annual Surface Water Report, Water Year 2020 Page 179 Centennial Wash near Aguila, ID #29007 Site Data LOCATION Along the Arizona and California Railroad east of SR 71 DRAINAGE AREA 93.4 MI2 STREAM TYPE Levee on natural drainage JURISDICTION Maricopa County, Arizona WATERSHED Upper Centennial SECTION/TOWNSHIP/RANGE S11 T7N R8W LATITUDE N 33° 58' 00.3" | +33.96675 LONGITUDE W 113° 04' 07.9" | ‐113.06887 STREAMGAGE INSTALLATION DATE 06/05/2001 ‐ WY 2001 AVAILABLE PERIOD OF RECORD (POR) 06/05/2001 ‐ Current LENGTH OF AVAILABLE POR DATA 19.32 Years | 7,058 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.00 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 2,272.84 feet NAVD88 POINT OF ZERO FLOW ‐0.5 feet Gage Height EXTREME FOR PERIOD OF RECORD 606 cfs | 3.37 feet | 01/21/2010 FCDMC Annual Surface Water Report, Water Year 2020 Page 180 Watershed Map Centennial Wash near Aguila - water year peaks 700 Discharge (cfs) 600 500 400 300 200 100 0 2000 2005 2010 2015 Water Years FCDMC Annual Surface Water Report, Water Year 2020 Page 181 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/21/2019 11/29/2019 12/24/2019 03/13/2020 03/19/2020 Peak Gage Height 0.55 0.78 2.15 0.38 1.00 0.75 Peak Discharge (cfs) 23 37 171 13 53 35 Hydrograph of peak WY 2020 flow event, 11/29/2019 Flood Flow Frequency Flood Flow Frequency N=20, HEC‐WRC computation (based on 20 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 34 147 299 523 953 1,400 FCDMC Annual Surface Water Report, Water Year 2020 Page 182 Centennial Wash near Aguila, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 --4 --5 --6 7 8 9 10 11 14 12 33 13 26 14 27 15 9 16 17 18 7 19 24 20 13 8 21 8 22 23 24 5 25 1 26 27 28 29 48 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 70 6 0 0 148 0 0 0 0 0 0 MEAN 0 2 0 0 0 5 0 0 0 0 0 0 MAX 0 171 13 0 0 53 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 138 12 0 0 293 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 223 MEAN 1 MAX 171 MIN 0 AC_FT 443 FCDMC Annual Surface Water Report, Water Year 2020 Page 183 Centennial Wash at Wenden, ID #27507 Site Data LOCATION In La Paz County on the eastern side of Wenden DRAINAGE AREA 586 mi2 STREAM TYPE Natural Stream JURISDICTION La Paz County WATERSHED Upper Centennial SECTION/TOWNSHIP/RANGE S32 T6N R12W LATITUDE N 33° 49' 27.2" | +33.82423 LONGITUDE W 113° 32' 01.3" | ‐113.53368 STREAMGAGE INSTALLATION DATE 09/16/1998 ‐ WY 1998 AVAILABLE PERIOD OF RECORD (POR) 09/16/1998 ‐ Current LENGTH OF AVAILABLE POR DATA 21.04 Years | 7,320 Days DATA GAPS IN POR 12/01/2002 ‐ 07/07/2004 STAGE GAGE ELEVATION 0.00 feet Gage Height STAFF GAGES 1 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,858.64 feet NAVD88 POINT OF ZERO FLOW ‐1.7 feet Gage Height EXTREME FOR PERIOD OF RECORD 24,250 cfs | 7.82 feet | 10/22/2000 FCDMC Annual Surface Water Report, Water Year 2020 Page 184 Watershed Map Centennial Wash at Wenden - water year peaks 30,000 Discharge (cfs) 25,000 20,000 15,000 10,000 5,000 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 185 2015 2020 2025 WY2020 Events Date of Peak 11/21/2019 11/29/2019 03/12/2020 03/12/2020 03/14/2020 03/18/2020 Peak Gage Height (feet) 1.44 3.86 2.49 3.14 2.84 2.54 Peak Discharge (cfs) 114 2,229 331 985 629 364 Hydrograph of peak WY 2020 flow event, 11/29/2019 Flood Flow Frequency Flood Flow Frequency N=22, HEC‐WRC computation (based on 22 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 1,680 5,570 9,440 13,900 20,500 25,800 NOTE: These results are based on limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 186 Centennial Wash at Wenden, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 113 2 1 3 4 5 6 7 8 9 10 11 12 87 13 301 --14 324 --15 2 16 17 18 30 19 18 20 21 27 22 23 24 25 26 --27 1 28 1 29 1277 30 891 --31 ---------------------------------------------------------------------------------------TOTAL 0 2199 123 0 0 762 1 0 0 0 0 0 MEAN 0 73 4 0 0 25 0 0 0 0 0 0 MAX 0 2229 440 0 0 985 8 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 4361 244 0 0 1511 2 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 3085 MEAN 8 MAX 2229 MIN 0 AC_FT 6118 FCDMC Annual Surface Water Report, Water Year 2020 Page 187 Centennial Levee, ID #25707 Site Data LOCATION Located in western Maricopa County, southwest of Salome Road and I‐10 DRAINAGE AREA 20 mi2 STREAM TYPE Levee on natural drainage JURISDICTION Maricopa County, Arizona WATERSHED Lower Centennial SECTION/TOWNSHIP/RANGE S17 T2N R10W LATITUDE N 33° 31' 09.9" | +33.51942 LONGITUDE W 113° 15' 37.8" | ‐113.26049 STREAMGAGE INSTALLATION DATE 07/09/2003 ‐ WY 2003 AVAILABLE PERIOD OF RECORD (POR) 07/09/2003 ‐ Current LENGTH OF AVAILABLE POR DATA 17.23 Years | 6,294 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.65 feet Gage Height STAFF GAGES 1 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,260.70 feet NAVD88 POINT OF ZERO FLOW 0.3 feet Gage Height EXTREME FOR PERIOD OF RECORD 1,000 cfs | 4.50 feet | 09/09/2013 FCDMC Annual Surface Water Report, Water Year 2020 Page 188 Watershed Map Centennial Levee - water year peaks 1,200 Axis Title 1,000 800 600 400 200 0 2000 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 189 2020 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) 08/30/2020 1.05 33 Hydrograph of peak WY 2020 flow event, 08/30/2020 Flood Flow Frequency Flood Flow Frequency N=18, HEC‐WRC computation (based on 18 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 51 235 498 904 1,730 2,620 FCDMC Annual Surface Water Report, Water Year 2020 Page 190 Centennial Levee, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 --2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --7 31 --------2 -------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 8 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 33 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 16 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 8 MEAN 0 MAX 33 MIN 0 AC_FT 16 FCDMC Annual Surface Water Report, Water Year 2020 Page 191 Centennial Wash at UPRR, ID #24707 Site Data LOCATION Located about 6 miles west of Arlington DRAINAGE AREA 1,817 mi2 STREAM TYPE Channelized Natural Stream JURISDICTION Maricopa County, Arizona WATERSHED Lower Centennial SECTION/TOWNSHIP/RANGE S28 T1S R6W LATITUDE N 33° 18' 35.6" | +33.30986 LONGITUDE W 112° 52' 58.4" | ‐112.88289 STREAMGAGE INSTALLATION DATE 02/09/1990 ‐ WY 1990 AVAILABLE PERIOD OF RECORD (POR) 02/09/1990 ‐ Current LENGTH OF AVAILABLE POR DATA 30.64 Years | 11,192 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 3.16 feet Gage Height STAFF GAGES 2 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 839.04 feet NAVD88 POINT OF ZERO FLOW 2.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 9,616 cfs | 9.10 feet | 02/08/1993 EXTREME OUTSIDE PERIOD OF RECORD 15,600 cfs | 09/02/1984 FCDMC Annual Surface Water Report, Water Year 2020 Page 192 Watershed Map Centennial at UPRR - water year peaks 12,000 Discharge (cfs) 10,000 8,000 6,000 4,000 2,000 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 193 2015 2020 2025 WY2020 Events Date of Peak 11/29/2019 03/13/2020 Peak Gage Height (feet) 7.89 10.50 Peak Discharge (cfs) 278 1,628 Hydrograph of peak WY 2020 flow event, 03/13/2020 Flood Flow Frequency Flood Flow Frequency N=31, HEC‐WRC computation (based on 31 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 1,220 4,110 7,080 10,600 16,000 20,400 NOTE: These results are based on limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 194 Centennial Wash at SPRR, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 4 13 501 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 42 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 42 0 0 0 505 0 0 0 0 0 0 MEAN 0 1 0 0 0 16 0 0 0 0 0 0 MAX 0 278 0 0 0 1628 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 83 0 0 0 1002 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 547 MEAN 1 MAX 1628 MIN 0 AC_FT 1085 FCDMC Annual Surface Water Report, Water Year 2020 Page 195 Centennial Tributary at Dobbins Road, ID #22807 Site Data LOCATION Located near the intersection of Dobbins Road and 435th Avenue DRAINAGE AREA 2.47 mi2 STREAM TYPE Natural Stream JURISDICTION Maricopa County, Arizona WATERSHED Lower Centennial SECTION/TOWNSHIP/RANGE S05 T1S R7W LATITUDE N 33° 21' 49.1" | +33.36364 LONGITUDE W 112° 59' 35.6" | ‐112.99321 STREAMGAGE INSTALLATION DATE 09/26/2012 ‐ WY 2012 AVAILABLE PERIOD OF RECORD (POR) 10/01/2012 ‐ Current LENGTH OF AVAILABLE POR DATA 8.00 Years | 2,922 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 1.20 feet Gage Height STAFF GAGES None CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,006.16 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 269 cfs | 2.82 feet | 03/01/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 196 Watershed Map Centennial Tributary at Dobbins Road - water year peaks 300 Discharge (cfs) 250 200 150 100 50 0 2010 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 197 2025 WY2020 Events Date of Peak 11/29/2019 03/13/2020 Peak Gage Height 1.75 1.76 Peak Discharge (cfs) 65 66 Hydrograph of peak WY 2020 flow event, 03/13/2020 Hydrograph not available due to gage failure on both events in Water Year 2020. Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 198 Centennial Tributary at Dobbins Road, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 199 Cline Creek, ID #66007 Site Data LOCATION Located about 1 mile north of Circle Mountain Road just off 12th Street DRAINAGE AREA 10.8 mi2 STREAM TYPE Natural Stream JURISDICTION Maricopa County, Arizona WATERSHED Skunk Creek SECTION/TOWNSHIP/RANGE S33 T7N R3E LATITUDE N 33° 54' 03.5" | +33.90097 LONGITUDE W 112° 03' 17.9" | ‐112.05497 STREAMGAGE INSTALLATION DATE 11/20/2001 ‐ WY 2002 AVAILABLE PERIOD OF RECORD (POR) 11/20/2001 ‐ Current LENGTH OF AVAILABLE POR DATA 18.86 Years | 6,890 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.95 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 2,171.07 feet NAVD88 POINT OF ZERO FLOW ‐0.1 feet Gage Height EXTREME FOR PERIOD OF RECORD 5,850 cfs | 8.15 feet | 08/19/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 200 Watershed Map Cline Creek - water year peaks 7,000 Discharge (cfs) 6,000 5,000 4,000 3,000 2,000 1,000 0 2000 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 201 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/21/2019 11/29/2019 12/05/2019 02/22/2020 08/30/2020 Peak Gage Height (feet) 4.26 1.34 2.52 1.40 1.35 1.06 Peak Discharge (cfs) 982 86 372 94 87 52 Hydrograph of peak WY 2020 flow event, 11/20/2019 Flood Flow Frequency Flood Flow Frequency N=19, HEC‐WRC computation (based on 19 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 247 1,120 2,130 3,400 5,360 7,000 NOTE(1): These results are based on very limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 202 Cline Creek, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 10 6 7 8 9 10 11 --12 ----13 --14 --15 --16 --17 18 19 20 59 21 45 22 13 18 23 24 6 25 26 27 28 29 64 30 --1 31 ---------------------------------------------------------------------------------------TOTAL 0 182 17 0 18 0 0 0 0 0 1 0 MEAN 0 6 1 0 1 0 0 0 0 0 0 0 MAX 0 982 94 0 87 0 0 0 0 0 52 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 360 33 0 35 0 0 0 0 0 1 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 217 MEAN 1 MAX 982 MIN 0 AC_FT 430 FCDMC Annual Surface Water Report, Water Year 2020 Page 203 Colter Channel at El Mirage Road, ID #85507 Site Data LOCATION Located on El Mirage Road north of Camelback Road DRAINAGE AREA 3.5 mi2 STREAM TYPE Engineered Channel JURISDICTION Phoenix, Arizona WATERSHED White Tanks A SECTION/TOWNSHIP/RANGE S13 T2N R1W LATITUDE N 33° 30' 41.1" | +33.51141 LONGITUDE W 112° 19' 25.6" | ‐112.32376 ARIZONA STATE PLANE E 575915 | N 913851 USGS QUAD SHEET El Mirage 7.5‐Minute STREAMGAGE INSTALLATION DATE 06/29/1994 ‐ WY 1994 AVAILABLE PERIOD OF RECORD (POR) 06/29/1994 ‐ Current LENGTH OF AVAILABLE POR DATA 26.26 Years | 9,591 Days DATA GAPS IN POR None STAGE GAGE TYPE Pressure Transducer STAGE GAGE ELEVATION 0.10 feet Gage Height STAFF GAGES 1 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,025.27 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 158 cfs | 1.52 feet | 09/08/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 204 Watershed Map Colter Channel at El Mirage Road - water year peaks 180 Discharge (cfs) 160 140 120 100 80 60 40 20 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 205 2015 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/29/2019 02/11/2020 02/22/2020 03/12/2020 03/12/2020 03/18/2020 Peak Gage Height (feet) 0.92 0.59 0.44 0.44 0.47 0.97 0.34 Peak Discharge (cfs) 44 31 24 24 25 46 19 Hydrograph of peak WY 2020 flow event, 03/12/2020 Flood Flow Frequency Flood Flow Frequency N=27, HEC‐WRC computation (based on 27 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 41 71 99 134 196 257 NOTE: These results are based on very limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 206 Colter Channel, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 3 12 3 13 2 14 15 16 17 18 2 19 20 14 21 22 7 23 24 25 26 1 27 28 29 7 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 22 0 0 10 6 0 0 1 0 0 0 MEAN 0 1 0 0 0 0 0 0 0 0 0 0 MAX 0 44 0 0 24 46 0 0 3 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 43 0 0 20 12 0 0 2 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 39 MEAN 0 MAX 46 MIN 0 AC_FT 77 FCDMC Annual Surface Water Report, Water Year 2020 Page 207 Columbus Wash – ID #40807 Site Data LOCATION Located at the east edge of Yuma County in the Hyder Valley DRAINAGE AREA 25.4 mi2 STREAM TYPE Encroached Natural Stream JURISDICTION Yuma County, Arizona WATERSHED Lower Gila SECTION/TOWNSHIP/RANGE S06 T4S R10W LATITUDE N 33° 06' 45.7" | +33.11268 LONGITUDE W 113° 20' 22.1" | ‐113.33946 STREAMGAGE INSTALLATION DATE 09/22/1999 ‐ WY 1999 AVAILABLE PERIOD OF RECORD (POR) 09/22/1999 ‐ Current LENGTH OF AVAILABLE POR DATA 21.03 Years | 7,680 Days DATA GAPS IN POR 12/18/2012 ‐ 01/07/2013 STAGE GAGE ELEVATION 2.50 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 713.58 feet NAVD88 POINT OF ZERO FLOW 1.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 615 cfs | 2.45 feet | 09/04/2012 FCDMC Annual Surface Water Report, Water Year 2020 Page 208 Watershed Map Columbus Wash - water year peaks 700 Discharge (cfs) 600 500 400 300 200 100 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 209 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) 11/29/2019 2.35 94 Hydrograph of peak WY 2020 flow event, 11/29/2019 Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 210 Columbus Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 --15 --16 --17 --18 --19 --20 21 22 23 24 25 26 27 28 29 8 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 8 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 94 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 15 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 8 MEAN 0 MAX 94 MIN 0 AC_FT 15 FCDMC Annual Surface Water Report, Water Year 2020 Page 211 Copper Wash, ID #41007 Site Data LOCATION Located in western Maricopa County near the Hyder Valley DRAINAGE AREA 6.6 mi2 STREAM TYPE Natural Stream JURISDICTION Maricopa County, Arizona WATERSHED Lower Gila SECTION/TOWNSHIP/RANGE S33 T2S R10W LATITUDE N 33° 12' 20.0" | +33.20557 LONGITUDE W 113° 17' 05.4" | ‐113.28483 STREAMGAGE INSTALLATION DATE 02/20/2001 ‐ WY 2001 AVAILABLE PERIOD OF RECORD (POR) 02/20/2001 ‐ Current LENGTH OF AVAILABLE POR DATA 19.61 Years | 7,163 Days DATA GAPS IN POR 08/27/2003 ‐ 09/04/2003 STAGE GAGE ELEVATION 0.80 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,064.00 feet NAVD88 POINT OF ZERO FLOW 0.1 feet Gage Height EXTREME FOR PERIOD OF RECORD 3,780 cfs | 5.69 feet | 08/27/2003 FCDMC Annual Surface Water Report, Water Year 2020 Page 212 Watershed Map Copper Wash - water year peaks 4,000 Discharge (cfs) 3,500 3,000 2,500 2,000 1,500 1,000 500 0 2000 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 213 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No runoff recorded in Water Year 2020. Flood Flow Frequency Flood Flow Frequency N=20, HEC‐WRC computation (based on 20 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 44 272 628 1,180 2,270 3,380 NOTE: These results are based on very limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 214 Copper Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 --15 --16 --17 --18 --19 --20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 1 0 0 0 1 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 1 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 215 Crossroads Park Basin, ID #33007 Site Data LOCATION Near Greenfield and Ray Roads DRAINAGE AREA 15.7 mi2 STREAM TYPE Flood control basin JURISDICTION Gilbert, Arizona WATERSHED Lower East Maricopa Floodway SECTION/TOWNSHIP/RANGE S21 T1S R6E LATITUDE N 33° 19' 39.7" | +33.32770 LONGITUDE W 111° 44' 47.9" | ‐111.74665 STREAMGAGE INSTALLATION DATE 12/18/1995 ‐ WY 1996 AVAILABLE PERIOD OF RECORD (POR) 12/18/1995 ‐ Current LENGTH OF AVAILABLE POR DATA 24.79 Years | 9,054 Days DATA GAPS IN POR None STAGE GAGE TYPE Pressure Transducer STAGE GAGE ELEVATION 1.33 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,248.46 feet NAVD88 POINT OF ZERO FLOW None ‐ Pump Control SPILLWAY CREST ELEVATION None TOP OF BASIN ELEVATION 23.3 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 216 Location Map Crossroads Park Basin - water year peaks 40 Volume (acre-feet) 35 30 25 20 15 10 5 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 217 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Volume (ac‐ft) Percent Spillway Capacity 03/24/2020 3.26 25.5 4.9 Hydrograph of peak WY 2020 impoundment event, 03/24/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 218 Crossroads Park, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 14 22 8 23 2 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 14 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 14 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 219 Crossroads Park Basin, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 1.3 1.3 1.3 1.5 1.5 1.5 1.3 1.3 1.3 1.3 1.3 1.3 2 1.3 1.3 1.4 1.5 1.5 1.5 1.3 1.3 1.3 1.3 1.3 1.3 3 1.3 1.3 1.5 1.5 1.5 1.5 1.3 1.3 1.3 1.3 1.3 1.3 4 1.3 1.3 1.5 1.5 1.5 1.5 1.3 1.3 1.3 1.3 1.3 1.3 5 1.3 1.3 1.5 1.5 1.5 1.5 1.3 1.3 1.3 1.3 1.3 1.3 6 1.3 1.3 1.5 1.5 1.5 1.5 1.3 1.3 1.3 1.3 1.3 1.3 7 1.3 1.3 1.5 1.5 1.5 1.5 1.3 1.3 1.3 1.3 1.3 1.3 8 1.3 1.3 1.5 1.5 1.5 1.5 1.3 1.3 1.3 1.3 1.3 1.3 9 1.3 1.3 1.5 1.5 1.5 1.5 1.3 1.3 1.3 1.3 1.3 1.3 10 1.3 1.3 1.5 1.5 1.5 1.5 1.3 1.3 1.3 1.3 1.3 1.3 11 1.3 1.3 1.5 1.5 1.5 1.5 1.3 1.3 1.3 1.3 1.3 1.3 12 1.3 1.3 1.5 1.5 1.5 1.5 1.3 1.3 1.3 1.3 1.3 1.3 13 1.3 1.3 1.5 1.5 1.5 1.5 1.3 1.3 1.3 1.3 1.3 1.3 14 1.3 1.3 1.5 1.5 1.5 1.5 1.3 1.3 1.3 1.3 1.3 1.3 15 1.3 1.3 1.5 1.5 1.5 1.5 1.3 1.3 1.3 1.3 1.3 1.3 16 1.3 1.3 1.5 1.5 1.5 1.5 1.3 1.3 1.3 1.3 1.3 1.3 17 1.3 1.3 1.5 1.5 1.5 1.5 1.3 1.3 1.3 1.3 1.3 1.3 18 1.3 1.3 1.5 1.5 1.5 1.5 1.3 1.3 1.3 1.3 1.3 1.3 19 1.3 1.3 1.5 1.5 1.5 1.6 1.3 1.3 1.3 1.3 1.3 1.3 20 1.3 1.3 1.5 1.5 1.5 1.9 1.3 1.3 1.3 1.3 1.3 1.3 21 1.3 1.3 1.5 1.5 1.5 2.2 1.3 1.3 1.3 1.3 1.3 1.3 22 1.3 1.3 1.5 1.5 1.5 2.5 1.3 1.3 1.3 1.3 1.3 1.3 23 1.3 1.3 1.5 1.5 1.5 2.9 1.3 1.3 1.3 1.3 1.3 1.3 24 1.3 1.3 1.5 1.5 1.5 3.0 1.3 1.3 1.3 1.3 1.3 1.3 25 1.3 1.3 1.5 1.5 1.5 3.1 1.3 1.3 1.3 0.0 1.3 1.3 26 1.3 1.3 1.5 1.5 1.5 2.9 1.3 1.3 1.3 1.3 1.3 1.3 27 1.3 1.3 1.5 1.5 1.5 2.8 1.3 1.3 1.3 1.3 1.3 1.3 28 1.3 1.3 1.5 1.5 1.5 2.5 1.3 1.3 1.3 1.3 1.3 1.3 29 1.3 1.3 1.5 1.5 1.5 2.4 1.3 1.3 1.3 1.3 1.3 1.3 30 1.3 1.3 1.5 1.5 --1.3 1.3 1.3 1.3 1.3 1.3 1.3 31 1.3 --1.5 1.5 --1.3 --1.3 --1.3 1.3 -------------------------------------------------------------------------------MEAN 1.3 1.3 1.5 1.5 1.5 1.8 1.3 1.3 1.3 1.3 1.3 1.3 MAX 1.3 1.3 1.5 1.5 1.5 3.3 1.3 1.3 1.3 1.3 1.3 1.3 MIN 1.3 1.3 1.3 1.4 1.4 1.3 1.3 1.3 1.3 1.3 1.3 1.3 -----------------------------------------------------------------------------WTR YR 2020 MEAN 1.41 MAX 3.26 MIN 1.33 FCDMC Annual Surface Water Report, Water Year 2020 Page 220 Cruff Wash, ID #23707 Site Data LOCATION Located about 7 miles west of Old US80 south of Agua Caliente Road DRAINAGE AREA 13.2 mi2 STREAM TYPE Natural Stream JURISDICTION Maricopa County, Arizona WATERSHED Lower Centennial SECTION/TOWNSHIP/RANGE S20 T2S R6W LATITUDE N 33° 15' 04.0" | +33.25111 LONGITUDE W 112° 52' 54.5" | ‐112.88180 STREAMGAGE INSTALLATION DATE 05/14/2002 ‐ WY 2002 AVAILABLE PERIOD OF RECORD (POR) 05/14/2002 ‐ Current LENGTH OF AVAILABLE POR DATA 18.38 Years | 6,715 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.33 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 937.36 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 1,627 cfs | 4.73 feet | 03/12/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 221 Watershed Map Cruff Wash - water year peaks 1,800 Discharge (cfs) 1,600 1,400 1,200 1,000 800 600 400 200 0 2000 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 222 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Discharge (cfs) 03/12/2020 4.73 1,627 Hydrograph of peak WY 2020 flow event, 03/12/2020 Flood Flow Frequency Flood Flow Frequency N=19, HEC‐WRC computation (based on 19 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 476 989 1,330 1,640 1,990 2,220 NOTE: These results are based on very limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 223 Cruff Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 101 13 28 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 129 0 0 0 0 0 0 MEAN 0 0 0 0 0 4 0 0 0 0 0 0 MAX 0 0 0 0 0 1701 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 256 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 129 MEAN 0 MAX 1701 MIN 0 AC_FT 256 FCDMC Annual Surface Water Report, Water Year 2020 Page 224 Daggs Wash, ID #48507 Site Data LOCATION Near 307th Avenue and Peak View Road DRAINAGE AREA 13.3 mi2 STREAM TYPE Natural Stream JURISDICTION Maricopa County, Arizona WATERSHED Lower Hassayampa SECTION/TOWNSHIP/RANGE S25 T5N R5W LATITUDE N 33° 44' 45.2" | +33.74590 LONGITUDE W 112° 43' 30.2" | ‐112.72506 STREAMGAGE INSTALLATION DATE 11/08/2007 ‐ WY 2008 AVAILABLE PERIOD OF RECORD (POR) 11/08/2007 ‐ Current LENGTH OF AVAILABLE POR DATA 12.90 Years | 4,711 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.15 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,668.55 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 617 cfs | 2.10 feet Gage Height | 08/19/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 225 Watershed Maps Daggs Wash - water year peaks 900 Discharge (cfs) 800 700 600 500 400 300 200 100 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 226 2020 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No runoff recorded in Water Year 2020. Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 227 Daggs Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 2 14 15 16 17 18 19 20 21 22 23 24 --25 --26 --27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 2 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 23 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 4 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 2 MEAN 0 MAX 23 MIN 0 AC_FT 4 FCDMC Annual Surface Water Report, Water Year 2020 Page 228 Deadman Wash at SR303L – ID #62107 Site Data LOCATION Located about 1.5 miles east of New River crossing DRAINAGE AREA 20.1 mi2 STREAM TYPE Natural Stream JURISDICTION Phoenix, Arizona WATERSHED Upper New River SECTION/TOWNSHIP/RANGE S18 T5N R2E LATITUDE N 33° 46' 52.6" | +33.78128 LONGITUDE W 112° 11' 37.7" | ‐112.19381 STREAMGAGE INSTALLATION DATE 10/17/2019 – WY2020 AVAILABLE PERIOD OF RECORD (POR) 12/22/1999 ‐ Current LENGTH OF AVAILABLE POR DATA 0.96 Years | 350 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.80 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,533.00 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 417 cfs | 1.42 feet | 11/20/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 229 Location Map W Carefree Hwy Discharge (cfs) Deadman Wash at SR303L - water year peaks 500 450 400 350 300 250 200 150 100 50 0 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 230 2025 WY2020 Events Date of Peak 11/20/2019 03/13/2020 03/13/2020 Peak Gage Height (feet) 1.42 1.19 0.92 Hydrograph of peak WY 2020 flow event, 11/20/2019 Flood Flow Frequency There are not enough data to compute a flood frequency for this site. FCDMC Annual Surface Water Report, Water Year 2020 Page 231 Peak Discharge (cfs) 417 250 123 Deadman Wash at SR303L, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 --2 --3 ----4 ----5 --6 --7 --8 --9 ----10 ----11 ----12 ----13 --56 14 ----3 15 ----16 ----17 254 23 --18 19 20 104 21 27 22 23 24 25 26 27 28 --29 30 --31 ---------------------------------------------------------------------------------------TOTAL 8398 131 23 0 0 58 0 0 0 0 0 0 MEAN 271 4 1 0 0 2 0 0 0 0 0 0 MAX 0 417 91 0 0 250 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 16658 259 45 0 0 115 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 8610 MEAN 24 MAX 417 MIN 0 AC_FT 17078 FCDMC Annual Surface Water Report, Water Year 2020 Page 232 Delaney Wash – ID #25007 Site Data LOCATION Near Salome Road and 427th Avenue DRAINAGE AREA 49 mi2 STREAM TYPE Natural Stream JURISDICTION Maricopa County, Arizona WATERSHED Lower Centennial SECTION/TOWNSHIP/RANGE S34 T2N R7W LATITUDE N 33° 28' 08.3" | +33.46897 LONGITUDE W 112° 58' 10.4" | ‐112.96955 STREAMGAGE INSTALLATION DATE 12/22/1999 ‐ WY 2000 AVAILABLE PERIOD OF RECORD (POR) 12/22/1999 ‐ Current LENGTH OF AVAILABLE POR DATA 20.78 Years | 7,589 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.11 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,112.03 feet NAVD88 POINT OF ZERO FLOW 0.2 feet Gage Height EXTREME FOR PERIOD OF RECORD 2,800 cfs | 8.06 feet | 09/09/2013 FCDMC Annual Surface Water Report, Water Year 2020 Page 233 Watershed Map Delaney Wash - water year peaks 3,000 Discharge (cfs) 2,500 2,000 1,500 1,000 500 0 2000 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 234 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/29/2019 03/12/2020 Peak Gage Height (feet) 1.54 2.73 1.77 Peak Discharge (cfs) 59 326 141 Hydrograph of peak WY 2020 flow event, 11/29/2019 Flood Flow Frequency Flood Flow Frequency N=21, HEC‐WRC computation (based on 21 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 533 1,050 1,510 2,040 2,860 3,610 NOTE: These results are based on very limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 235 Delaney Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 --2 --3 4 5 6 7 8 9 10 11 12 3 13 10 14 15 16 17 18 19 20 1 21 22 23 24 25 26 27 28 29 14 30 ----31 ---------------------------------------------------------------------------------------TOTAL 0 15 0 0 0 13 0 0 0 0 0 0 MEAN 0 1 0 0 0 0 0 0 0 0 0 0 MAX 0 325 0 0 0 141 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 30 0 0 0 26 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 28 MEAN 0 MAX 325 MIN 0 AC_FT 56 FCDMC Annual Surface Water Report, Water Year 2020 Page 236 Desert Hills Wash, ID #19307 Site Data LOCATION Located west of 16th Street, on Joy Ranch Road DRAINAGE AREA 1.0 mi2 STREAM TYPE Culvert on natural stream JURISDICTION Maricopa County, Arizona WATERSHED Cave Creek SECTION/TOWNSHIP/RANGE S28 T6N R3E LATITUDE N 33° 49' 41.6" | +33.82882 LONGITUDE W 112° 02' 54.0" | ‐112.04832 STREAMGAGE INSTALLATION DATE 03/02/2006 ‐ WY 2006 AVAILABLE PERIOD OF RECORD (POR) 03/02/2006 ‐ Current LENGTH OF AVAILABLE POR DATA 14.58 Years | 5,327 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.50 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,856.02 feet NAVD88 POINT OF ZERO FLOW 0.55 feet Gage Height EXTREME FOR PERIOD OF RECORD 252 cfs | 4.90 feet | 08/19/2014 & 09/08/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 237 Watershed Map Desert Hills Wash - water year peaks 350 Discharge (cfs) 300 250 200 150 100 50 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 238 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/20/2019 11/29/2019 12/22/2019 12/24/2019 02/22/2020 03/13/2020 Peak Gage Height (feet) 2.74 3.87 2.35 0.64 0.64 0.64 2.94 Peak Discharge (cfs) 136 234 106 15 15 15 152 Hydrograph of peak WY 2020 flow event, 11/20/2019 Flood Flow Frequency Flood Flow Frequency N=15, HEC‐WRC computation (based on 15 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 151 256 318 271 430 467 FCDMC Annual Surface Water Report, Water Year 2020 Page 239 Desert Hills Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 8 14 15 16 17 18 19 --20 13 --21 22 2 23 24 1 25 26 27 28 29 6 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 18 1 0 2 8 0 0 0 0 0 0 MEAN 0 1 0 0 0 0 0 0 0 0 0 0 MAX 0 234 15 0 15 152 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 36 2 0 4 17 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 30 MEAN 0 MAX 234 MIN 0 AC_FT 59 FCDMC Annual Surface Water Report, Water Year 2020 Page 240 Dreamy Draw Dam, ID #9807 Site Data LOCATION Located near Northern Avenue and SR 51 DRAINAGE AREA 1.35 mi2 JURISDICTION Phoenix, Arizona WATERSHED Upper ACDC SECTION/TOWNSHIP/RANGE S34 T3N R3E LATITUDE N 33° 33' 43.8" | +33.56217 LONGITUDE W 112° 01' 53.7" | ‐112.03159 STREAMGAGE INSTALLATION DATE 01/24/1984 ‐ WY 1984 AVAILABLE PERIOD OF RECORD (POR) 08/29/1988 ‐ Current LENGTH OF AVAILABLE POR DATA 32.09 Years | 11,721 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.12 feet Gage Height STAFF GAGES 9 ZERO GAGE HEIGHT ELEVATION 1,371.46 feet NAVD1988 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY ELEVATION 35.50 feet Gage Height TOP OF DAM ELEVATION 47.04 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 241 Watershed Map Dreamy Draw Dam - water year peaks 40 Volume (acre-feet) 35 30 25 20 15 10 5 0 1985 1990 1995 2000 2005 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 242 2010 2015 2020 2025 WY2020 Events Date of Peak 11/29/2019 12/09/2019 03/12/2020 03/13/2020 03/13/2020 03/18/2020 Peak Gage Height (feet) 2.16 4.46 8.42 4.31 5.10 2.90 Peak Volume (ac‐ft) 0.1 0.5 2.8 0.5 0.7 0.2 Hydrograph of peak WY 2020 impoundment event, 03/12/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 243 Percent Spillway Capacity 0.0 0.2 0.9 0.2 0.2 0.0 Dreamy Draw Dam, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 3 10 1 11 12 8 13 13 14 3 15 16 17 18 3 19 3 20 21 22 1 23 24 1 25 1 26 27 28 29 2 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 2 6 0 1 31 0 0 0 0 0 0 MEAN 0 0 0 0 0 1 0 0 0 0 0 0 MAX 0 26 70 0 5 116 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 3 11 0 2 61 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 39 MEAN 0 MAX 116 MIN 0 AC_FT 78 FCDMC Annual Surface Water Report, Water Year 2020 Page 244 Dreamy Draw Dam, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 3 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 3 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 245 Dreamy Draw Dam, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 4 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 5 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 6 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 7 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 8 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 9 0.1 0.1 0.4 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 10 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 11 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 12 0.1 0.1 0.1 0.1 0.1 0.8 0.1 0.1 0.1 0.1 0.1 0.1 13 0.1 0.1 0.1 0.1 0.1 1.3 0.1 0.1 0.1 0.1 0.1 0.1 14 0.1 0.1 0.1 0.1 0.1 0.6 0.1 0.1 0.1 0.1 0.1 0.1 15 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 16 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 17 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 18 0.1 0.1 0.1 0.1 0.1 0.4 0.1 0.1 0.1 0.1 0.1 0.1 19 0.1 0.1 0.1 0.1 0.1 0.5 0.1 0.1 0.1 0.1 0.1 0.1 20 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 21 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 22 0.1 0.1 0.1 0.1 0.3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 23 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 24 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 25 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 26 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 27 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 28 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 29 0.1 0.3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 30 0.1 0.1 0.1 0.1 --0.1 0.1 0.1 0.1 0.1 0.1 0.1 31 0.1 --0.1 0.1 --0.1 --0.1 --0.1 0.1 -------------------------------------------------------------------------------MEAN 0.1 0.1 0.1 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 MAX 0.1 2.2 4.5 0.1 0.8 8.4 0.1 0.1 0.1 0.1 0.1 0.1 MIN 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.13 MAX 8.42 MIN 0.12 FCDMC Annual Surface Water Report, Water Year 2020 Page 246 Dysart Drain at LAFB, ID #85807 Site Data LOCATION On Dysart Drain about 1/3 mile east of Litchfield Road DRAINAGE AREA 24.3 mi2 STREAM TYPE Engineered Channel JURISDICTION Glendale, Arizona WATERSHED White Tanks A SECTION/TOWNSHIP/RANGE S03 T2N R1W LATITUDE N 33° 32' 38.3" | +33.54397 LONGITUDE W 112° 20' 57.8" | ‐112.34940 STREAMGAGE INSTALLATION DATE 08/22/1996 ‐ WY 1996 AVAILABLE PERIOD OF RECORD (POR) 08/22/1996 ‐ Current LENGTH OF AVAILABLE POR DATA 24.11 Years | 8,806 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.10 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,063.48 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 862 cfs | 4.30 feet | 09/08/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 247 Watershed Map Discharge (cfs) Dysart Drain at LAFB - water year peaks 1,000 900 800 700 600 500 400 300 200 100 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 248 2015 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/29/2019 03/13/2020 Peak Gage Height (feet) 0.99 0.89 1.09 Peak Discharge (cfs) 51 16 62 NOTE: There is often a base flow at this location. Hydrograph of peak WY 2020 flow event, 03/13/2020 Flood Flow Frequency Flood Flow Frequency N=25, HEC‐WRC computation (based on 25 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 75 173 272 399 621 838 NOTE: These results are based on very limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 249 Dysart Drain at LAFB, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 5 2 2 2 3 2 2 4 2 5 2 6 2 7 2 8 2 9 2 2 10 9 11 2 2 12 2 1 2 13 2 19 14 2 2 15 4 16 2 17 2 18 4 19 3 2 20 12 2 21 1 22 23 24 25 3 26 27 28 29 16 2 30 --4 31 ---------------------------------------------------------------------------------------TOTAL 24 35 7 2 0 48 8 2 0 0 2 0 MEAN 1 1 0 0 0 2 0 0 0 0 0 0 MAX 10 50 13 9 0 60 8 8 0 0 8 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 48 70 14 5 0 96 16 4 0 0 4 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 129 MEAN 0 MAX 60 MIN 0 AC_FT 256 FCDMC Annual Surface Water Report, Water Year 2020 Page 250 Dysart Drain at El Mirage Road, ID #85707 Site Data LOCATION On El Mirage Road about mid‐way between Glendale and Northern Avenues DRAINAGE AREA 34.7 mi2 STREAM TYPE Engineered Channel JURISDICTION Glendale, Arizona WATERSHED White Tanks A SECTION/TOWNSHIP/RANGE S016 T2N R1W LATITUDE N 33° 32' 37.1" | +33.54370 LONGITUDE W 112° 19' 26.6" | ‐112.32399 STREAMGAGE INSTALLATION DATE 03/07/1997 ‐ WY 1997 AVAILABLE PERIOD OF RECORD (POR) 03/07/1997 ‐ Current LENGTH OF AVAILABLE POR DATA 23.57 Years | 8,609 Days DATA GAPS IN POR None STAGE GAGE TYPE Pressure Transducer STAGE GAGE ELEVATION 0.20 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,054.29 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 823 cfs | 5.30 feet | 09/08/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 251 Watershed Map Dysart Drain at El Mirage Road - water year peaks 900 Discharge (cfs) 800 700 600 500 400 300 200 100 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 252 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Discharge (cfs) None NOTE: There is a more or less continual base flow at this location. Hydrograph of peak WY 2020 flow event, No recorded runoff greater than the continual base‐flow of about 2 cfs. Flood Flow Frequency Flood Flow Frequency N=27, HEC‐WRC computation (based on 27 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 62 271 545 932 1,640 2,330 NOTE: These results are based on very limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 253 Dysart Drain at El Mirage Road, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 254 East Fork Cave Creek Basin #1, ID #7807 Site Data LOCATION On Beardsley Road east of Cave Creek Road DRAINAGE AREA 1.18 mi2 STREAM TYPE Flood control basin on natural stream JURISDICTION Phoenix, Arizona WATERSHED Upper ACDC SECTION/TOWNSHIP/RANGE S26 T4N R3E LATITUDE N 33° 40' 11.3" | +33.66981 LONGITUDE W 112° 01' 31.3" | ‐112.02536 STREAMGAGE INSTALLATION DATE 03/02/1994 ‐ WY 1994 AVAILABLE PERIOD OF RECORD (POR) 03/02/1994 ‐ Current LENGTH OF AVAILABLE POR DATA DATA 26.58 Years | 9,710 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.23 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,489.95 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY CREST ELEVATION No spillway TOP OF BASIN ELEVATION 7.16 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 255 Watershed Map EFCC Basin #1 - water year peaks Volume (acre-feet) 30 25 20 15 10 5 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 256 2015 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/20/2019 11/29/2019 03/13/2020 Peak Gage Height (feet) 0.50 0.70 0.62 0.50 Peak Volume (ac‐ft) 0.3 0.4 0.4 0.3 Hydrograph of peak WY 2020 impoundment event, 11/20/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 257 Percent Spillway Capacity 0.6 0.8 0.7 0.5 East Fork Cave Creek Basin #1, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --2 8 --1 9 --10 11 12 13 14 15 16 17 18 19 20 1 21 22 23 24 1 25 26 27 1 28 1 29 1 30 --31 ---------------------------------------------------------------------------------------TOTAL 15 15 15 15 13 14 14 15 10 17 15 13 MEAN 0 1 0 0 0 0 0 0 0 1 0 0 MAX 0 6 2 0 0 3 0 0 0 2 2 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 30 30 30 30 27 29 29 30 20 34 30 26 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 172 MEAN 0 MAX 6 MIN 0 AC_FT 342 FCDMC Annual Surface Water Report, Water Year 2020 Page 258 East Fork Cave Creek Basin #1, volume data Volume, in acre feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 0 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 259 East Fork Cave Creek Basin #1, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 5 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 6 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 7 0.2 0.2 0.2 0.2 --0.2 0.2 0.2 0.2 0.3 0.2 0.2 8 0.2 0.2 0.2 0.2 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 9 0.2 0.2 0.2 0.2 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 10 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 11 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 12 0.2 0.2 0.2 0.2 0.2 0.0 0.2 0.2 0.2 0.2 0.2 0.2 13 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 14 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 15 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 16 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 17 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 18 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 19 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 20 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 21 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 22 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 23 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 24 0.2 0.2 0.2 0.2 0.2 0.0 0.2 0.2 0.2 0.0 0.2 0.2 25 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 26 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 27 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 28 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 29 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 30 0.2 0.2 0.2 0.2 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 31 0.2 --0.2 0.2 --0.2 --0.2 --0.2 0.2 -------------------------------------------------------------------------------MEAN 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 MAX 0.2 0.7 0.3 0.2 0.2 0.5 0.2 0.2 0.2 0.3 0.2 0.2 MIN 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.23 MAX 0.70 MIN 0.23 FCDMC Annual Surface Water Report, Water Year 2020 Page 260 East Fork Cave Creek Basin #3A, ID #8807 Site Data LOCATION Located near Cave Creek Road and Grovers Avenue DRAINAGE AREA Undetermined STREAM TYPE Flood control basin JURISDICTION Phoenix, Arizona WATERSHED Upper ACDC SECTION/TOWNSHIP/RANGE S34 T4N R3E LATITUDE N 33° 38' 46.0" | +33.65630 LONGITUDE W 112° 02' 21.0" | ‐112.03840 STREAMGAGE INSTALLATION DATE 10/14/2015 ‐ WY 2016 AVAILABLE PERIOD OF RECORD (POR) 10/14/2015 ‐ Current LENGTH OF AVAILABLE POR DATA 4.97 Years | 1,814 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.00 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,425.27 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY CREST ELEVATION No spillway TOP OF BASIN ELEVATION 14.3 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 261 Watershed Map EFCC Basin #3a - water year peaks 4.0 Volume (acre-feet) 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 2015 2016 2017 2018 2019 2020 2021 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 262 2022 2023 2024 2025 WY2020 Events Date of Peak 11/20/2019 11/20/2019 11/29/2019 03/13/2020 Peak Gage Height (feet) 0.99 0.97 0.99 1.07 Peak Volume (ac‐ft) 1.1 1.0 1.1 1.2 Hydrograph of peak WY 2020 impoundment event, 03/13/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 263 Percent Spillway Capacity 0.9 0.9 0.9 1.0 EFCC Basin #3A, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 1 14 15 16 17 18 19 20 9 21 22 23 24 5 25 26 27 28 29 2 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 11 5 0 0 1 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 29 28 0 0 31 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 22 11 0 0 1 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 17 MEAN 0 MAX 31 MIN 0 AC_FT 35 FCDMC Annual Surface Water Report, Water Year 2020 Page 264 EFCC Basin #3A, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 1 1 0 0 1 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 1 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 265 EFCC Basin #3A, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 2 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 3 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 4 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 5 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 6 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 7 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 9 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 10 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 11 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 12 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 13 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 14 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 15 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 16 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 17 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 18 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 19 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 20 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 21 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 22 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 23 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 24 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 25 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 26 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 27 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 28 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 29 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 30 0.8 0.8 0.8 0.8 --0.8 0.8 0.8 0.8 0.8 0.8 0.8 31 0.8 --0.8 0.8 --0.8 --0.8 --0.8 0.8 -------------------------------------------------------------------------------MEAN 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 MAX 0.8 1.0 1.0 0.8 0.8 1.1 0.8 0.8 0.8 0.8 0.8 0.8 MIN 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.80 MAX 1.07 MIN 0.80 FCDMC Annual Surface Water Report, Water Year 2020 Page 266 East Fork Cave Creek Basin #3B, ID #8707 Site Data LOCATION Near 20th Street and Grovers Avenue DRAINAGE AREA 3.52 mi2 STREAM TYPE9/ Flood control basin on natural stream JURISDICTION Phoenix, Arizona WATERSHED Upper ACDC SECTION/TOWNSHIP/RANGE S34 T4N R3E LATITUDE N 33° 38' 45.9" | +33.64609 LONGITUDE W 112° 02' 21.1" | ‐112.03918 STREAMGAGE INSTALLATION DATE 09/13/1994 ‐ WY 1994 AVAILABLE PERIOD OF RECORD (POR) 09/13/1994 ‐ Current LENGTH OF AVAILABLE POR DATA DATA 26.05 Years | 9,515 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.15 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,419.45 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY CREST ELEVATION 14.6 feet Gage Height TOP OF BASIN ELEVATION 15.0 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 267 Location Map EFCC Basin #3B - water year peaks Volume (acre-feet) 60 50 40 30 20 10 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 268 2015 2020 2025 WY2020 Events Date of Peak 11/20/2019 03/13/2020 Peak Gage Height (feet) 0.39 0.32 Peak Volume (ac‐ft) 0.0 0.0 Hydrograph of peak WY 2020 impoundment event, 11/20/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 269 Percent Spillway Capacity 0.0 0.0 East Fork Cave Creek Basin #3B, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 --11 --12 13 14 --15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 270 East Fork Cave Creek Basin #3B, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 --11 --12 13 14 --15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 0 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 271 East Fork Cave Creek Basin #3B, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 4 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 5 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 6 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 7 0.1 0.1 0.1 0.1 --0.1 0.1 0.1 0.1 0.1 0.1 0.1 8 0.1 0.1 0.1 0.1 --0.1 0.1 0.1 0.1 0.1 0.1 0.1 9 0.1 0.1 0.1 0.1 --0.1 0.1 0.1 0.1 0.1 0.1 0.1 10 0.1 0.1 0.1 --0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 11 0.1 0.1 0.1 --0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 12 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 13 0.1 0.1 0.1 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 14 0.1 0.1 0.1 --0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 15 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 16 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 17 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 18 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 19 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 20 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 21 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 22 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 23 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 24 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 25 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 26 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 27 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 28 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 29 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 30 0.1 0.1 0.1 0.1 --0.1 0.1 0.1 0.1 0.1 0.1 0.1 31 0.1 --0.1 0.1 --0.1 --0.1 --0.1 0.1 -------------------------------------------------------------------------------MEAN 0.1 0.2 0.1 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 MAX 0.1 0.4 0.1 0.1 0.1 0.3 0.1 0.1 0.1 0.1 0.1 0.1 MIN 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.15 MAX 0.39 MIN 0.15 FCDMC Annual Surface Water Report, Water Year 2020 Page 272 East Fork Cave Creek Basin #4 – ID #8207 Site Data LOCATION Near Paradise Valley Community College DRAINAGE AREA 0.68 mi2 JURISDICTION Phoenix, Arizona WATERSHED Upper ACDC SECTION/TOWNSHIP/RANGE S36 T4N R3E LATITUDE N 33° 38' 56.5" | +33.64904 LONGITUDE W 112° 00' 37.5" | ‐112.01041 STREAMGAGE INSTALLATION DATE 01/18/1994 ‐ WY 1994 AVAILABLE PERIOD OF RECORD (POR) 01/18/1994 ‐ Current LENGTH OF AVAILABLE POR DATA DATA 26.70 Years | 9753 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.30 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,464.57 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY CREST ELEVATION 8.0 feet Gage Height TOP OF BASIN ELEVATION 8.5 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 273 Location Map (watershed not available) EFCC Basin #4 - water year peaks 9 Volume (acre-feet) 8 7 6 5 4 3 2 1 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 274 2015 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/20/2019 11/29/2019 12/08/2019 12/09/2019 12/24/2019 12/25/2019 12/27/2019 02/22/2020 03/11/2020 03/12/2020 03/12/2020 03/13/2020 03/13/2020 03/18/2020 Peak Gage Height (feet) 1.51 2.18 1.51 0.85 1.25 1.23 1.00 1.25 1.48 1.33 1.25 1.99 1.88 1.11 0.74 Peak Volume (ac‐ft) 0.6 1.4 0.6 0.3 0.5 0.4 0.4 0.5 0.6 0.5 0.5 0.9 0.8 0.4 0.2 Hydrograph of peak WY 2020 impoundment event, 11/20/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 275 Percent Spillway Capacity 1.0 2.0 1.0 0.4 0.8 0.6 0.6 0.8 0.9 0.8 0.8 1.7 1.5 0.6 0.3 East Fork Cave Creek Basin #4, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 11 12 1 13 1 14 15 16 17 18 19 20 2 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 2 0 0 0 2 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 32 1 0 4 26 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 3 0 0 0 4 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 4 MEAN 0 MAX 32 MIN 0 AC_FT 8 FCDMC Annual Surface Water Report, Water Year 2020 Page 276 East Fork Cave Creek Basin #4, volume data Volume, in acre feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 1 1 0 1 1 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 1 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 277 East Fork Cave Creek Basin #4, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 2 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 4 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 5 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 7 0.3 0.3 0.3 0.3 --0.3 0.3 0.3 0.3 0.3 0.3 0.3 8 0.3 0.3 0.3 0.3 --0.3 0.3 0.3 0.3 0.3 0.3 0.3 9 0.3 0.3 0.5 0.3 --0.3 0.3 0.3 0.3 0.3 0.3 0.3 10 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 11 0.3 0.3 0.3 0.3 0.3 0.4 0.3 0.3 0.3 0.3 0.3 0.3 12 0.3 0.3 0.3 0.3 0.3 0.5 0.3 0.3 0.3 0.3 0.3 0.3 13 0.3 0.3 0.3 0.3 0.3 0.5 0.3 0.3 0.3 0.3 0.3 0.3 14 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 15 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 16 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 17 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 18 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 19 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 20 0.3 0.7 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 21 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 22 0.3 0.3 0.3 0.3 0.5 0.3 0.3 0.3 0.3 0.3 0.3 0.3 23 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 24 0.3 0.3 0.3 0.3 0.3 0.0 0.3 0.3 0.3 0.0 0.3 0.3 25 0.3 0.3 0.4 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 26 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 27 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 28 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 29 0.3 0.5 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 30 0.3 0.3 0.3 0.3 --0.3 0.3 0.3 0.3 0.3 0.3 0.3 31 0.3 --0.3 0.3 --0.3 --0.3 --0.3 0.3 -------------------------------------------------------------------------------MEAN 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 MAX 0.5 2.2 1.2 0.3 1.5 2.0 0.3 0.3 0.3 0.3 0.3 0.3 MIN 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.30 MAX 2.18 MIN 0.30 FCDMC Annual Surface Water Report, Water Year 2020 Page 278 East Fork Cave Creek near 7th Avenue, ID #8507 Site Data LOCATION In Moon Valley Park, near Coral Gable Drive and 7th Avenue DRAINAGE AREA 14.1 mi2 STREAM TYPE Channelized Natural Stream JURISDICTION Phoenix, Arizona WATERSHED Upper ACDC SECTION/TOWNSHIP/RANGE S05 T3N R3E LATITUDE N 33° 37' 40.6" | +33.62793 LONGITUDE W 112° 04' 50.7" | ‐112.08076 STREAMGAGE INSTALLATION DATE 05/08/1997 ‐ WY 1997 AVAILABLE PERIOD OF RECORD (POR) 05/08/1997 ‐ Current LENGTH OF AVAILABLE POR DATA DATA 23.40 Years | 8,547 Days DATA GAPS IN POR None STAGE GAGE ELEVATION ‐0.25 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,341.59 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 4,067 cfs | 7.55 feet | 08/02/2005 FCDMC Annual Surface Water Report, Water Year 2020 Page 279 Watershed Map East Fork Cave Creek near 7th Avenue - water year peaks 4,500 Discharge (cfs) 4,000 3,500 3,000 2,500 2,000 1,500 1,000 500 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 280 2015 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/29/2019 12/08/2019 12/24/2019 12/25/2019 12/27/2019 02/11/2020 02/22/2020 03/11/2020 03/12/2020 03/12/2020 03/13/2020 03/13/2020 03/18/2020 07/25/2020 Peak Gage Height (feet) 2.19 2.19 0.48 0.33 0.87 0.97 1.55 1.65 1.06 1.31 1.80 2.14 2.58 0.77 0.04 Peak Discharge (cfs) 490 490 30 20 62 81 231 266 98 162 321 467 700 48 2 Hydrograph of peak WY 2020 flow event, 03/13/2020 Flood Flow Frequency Flood Flow Frequency N=24, HEC‐WRC computation (based on 24 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 540 1,260 1,950 2,780 4,140 5,390 8,200 9,400 FEMA FIS 5,500 FCDMC Annual Surface Water Report, Water Year 2020 Page 281 East Fork Cave Creek near 7th Avenue, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 13 --9 --10 2 11 40 23 12 51 13 105 14 11 15 16 17 18 7 19 12 20 121 21 23 22 9 53 23 5 24 9 25 23 1 26 4 27 9 28 11 29 68 30 3 --31 ---------------------------------------------------------------------------------------TOTAL 0 224 71 0 99 209 0 0 0 1 0 0 MEAN 0 7 2 0 3 7 0 0 0 0 0 0 MAX 0 490 81 0 266 700 0 0 0 2 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 444 140 0 196 415 0 0 0 2 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 604 MEAN 2 MAX 700 MIN 0 AC_FT 1197 FCDMC Annual Surface Water Report, Water Year 2020 Page 282 El Mirage Road Drain, ID #14507 Site Data LOCATION Located near El Mirage Road south of Loop 303 DRAINAGE AREA 70.3 mi2 STREAM TYPE Natural Stream JURISDICTION Surprise, Arizona WATERSHED Trilby SECTION/TOWNSHIP/RANGE S14 T4N R1W LATITUDE N 33° 41' 26.6" | +33.69072 LONGITUDE W 112° 19' 40.9" | ‐112.32804 STREAMGAGE INSTALLATION DATE 02/16/2006 ‐ WY 2006 AVAILABLE PERIOD OF RECORD (POR) 02/16/2006 ‐ Current LENGTH OF AVAILABLE POR DATA 14.62 Years | 5,341 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 1.20 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 0.00 feet Gage Height POINT OF ZERO FLOW 0.3 feet Gage Height EXTREME FOR PERIOD OF RECORD 475 cfs | 3.36 feet GH | 01/21/2010 FCDMC Annual Surface Water Report, Water Year 2020 Page 283 Watershed Map Discharge (cfs) El Mirage Road Drain - water year peaks 500 450 400 350 300 250 200 150 100 50 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 284 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No runoff recorded in Water Year 2020. Flood Flow Frequency Flood Flow Frequency N=15, HEC‐WRC computation (based on 15 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 73 306 556 847 1,270 1,590 50‐year 100‐year 4,747 6,023 NOTE(1): These results are based on very limited data. Flood Flow Frequency FEMA Flood Insurance Study 2‐year 5‐year 10‐year 2,835 FCDMC Annual Surface Water Report, Water Year 2020 Page 285 20‐year El Mirage Road Drain, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 286 East Maricopa Floodway at Broadway Road, ID #34307 Site Data LOCATION Located about 1,000 feet south of Broadway Road, east of Higley Road DRAINAGE AREA 11.3 mi2 STREAM TYPE Engineered Channel JURISDICTION Mesa, Arizona WATERSHED Upper East Maricopa Floodway SECTION/TOWNSHIP/RANGE S26 T1N R6E LATITUDE N 33° 24' 19.8" | +33.40551 LONGITUDE W 111° 42' 37.4" | ‐111.71040 STREAMGAGE INSTALLATION DATE 08/10/1989 ‐ WY 1989 AVAILABLE PERIOD OF RECORD (POR) 09/03/1990 ‐ Current LENGTH OF AVAILABLE POR DATA 30.08 Years | 10,986 Days DATA GAPS IN POR None STAGE GAGE ELEVATION ‐3.84 feet Gage Height STAFF GAGES 1 CREST STAGE GAGES 2 ZERO GAGE HEIGHT ELEVATION 1,335.63 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 4,292 cfs | 5.08 feet GH | 09/07/2012 FCDMC Annual Surface Water Report, Water Year 2020 Page 287 Watershed Map Discharge (cfs) EMF at Broadway Road - water year peaks 5,000 4,500 4,000 3,500 3,000 2,500 2,000 1,500 1,000 500 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 288 2015 2020 2025 WY2020 Events Date of Peak 11/21/2019 11/29/2019 12/27/2019 02/23/2020 03/11/2020 03/18/2020 08/29/2020 Peak Gage Height (feet) 0.95 1.42 0.51 0.61 0.72 0.61 ‐0.61 Peak Discharge (cfs) 76 184 40 44 48 44 6 Hydrograph of peak WY 2020 flow event, 11/29/2019 Flood Flow Frequency Flood Flow Frequency N=30, HEC‐WRC computation (based on 30 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 766 1,770 2,630 3,570 4,940 6,060 NOTE(1): These results are based on limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 289 EMF at Broadway Road, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 9 2 2 3 4 5 6 7 8 9 10 3 11 1 6 24 12 4 27 13 1 23 14 6 15 1 16 17 18 10 19 31 20 15 13 21 41 3 22 30 12 23 12 35 24 2 16 25 19 4 26 27 1 27 34 28 24 29 52 6 30 27 1 --3 31 ---------------------------------------------------------------------------------------TOTAL 0 179 128 0 79 138 0 0 0 0 3 0 MEAN 0 6 4 0 3 4 0 0 0 0 0 0 MAX 0 184 40 0 44 48 0 0 0 0 6 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 355 253 0 157 273 0 0 0 0 6 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 527 MEAN 1 MAX 184 MIN 0 AC_FT 1044 FCDMC Annual Surface Water Report, Water Year 2020 Page 290 East Maricopa Fldwy below Powerline Floodway, ID #33707 Site Data LOCATION Located about 1/3 mile downstream from Powerline Floodway DRAINAGE AREA 257 mi2 STREAM TYPE Concrete Lined Channel JURISDICTION Mesa, Arizona WATERSHED Lower EMF SECTION/TOWNSHIP/RANGE S30 T1S R7E LATITUDE N 33° 19' 01.7" | +33.31715 LONGITUDE W 111° 41' 03.3" | ‐111.68424 STREAMGAGE INSTALLATION DATE 04/15/2014 ‐ WY 2014 AVAILABLE PERIOD OF RECORD (POR) 04/15/2014 ‐ Current LENGTH OF AVAILABLE POR DATA 6.46 Years | 2,361 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.15 feet Gage Height STAFF GAGES None CREST STAGE GAGES None ZERO GAGE HEIGHT ELEVATION 1,316.23 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 3,372 cfs | 6.27 feet | 08/10/2018 FCDMC Annual Surface Water Report, Water Year 2020 Page 291 Watershed Map EMF below Powerline Floodway - water year peaks 4,500 Discharge (cfs) 4,000 3,500 3,000 2,500 2,000 1,500 1,000 500 0 2010 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 292 2025 WY2020 Events Date of Peak 11/22/2019 11/29/2019 Peak Gage Height 0.90 1.15 Peak Discharge (cfs) 72 148 Hydrograph of peak WY 2020 flow event, 11/29/2019 Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 293 EMF below Powerline Floodway, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 14 22 13 23 24 25 26 27 28 29 77 30 7 --31 ---------------------------------------------------------------------------------------TOTAL 0 111 0 0 0 0 0 0 0 0 0 0 MEAN 0 4 0 0 0 0 0 0 0 0 0 0 MAX 0 148 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 220 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 111 MEAN 0 MAX 148 MIN 0 AC_FT 220 FCDMC Annual Surface Water Report, Water Year 2020 Page 294 East Maricopa Floodway at Queen Creek Road, ID #34807 Site Data LOCATION West of the Higley and Queen Creek Roads intersection DRAINAGE AREA 273.4 mi2 STREAM TYPE Engineered Channel JURISDICTION Gilbert, Arizona WATERSHED Lower East Maricopa Floodway SECTION/TOWNSHIP/RANGE S15 T2S R6E LATITUDE N 33° 15' 47.1" | +33.26307 LONGITUDE W 111° 43' 32.6" | ‐111.72572 STREAMGAGE INSTALLATION DATE 01/18/1989 ‐ WY 1989 AVAILABLE PERIOD OF RECORD (POR) 01/18/1989 ‐ current LENGTH OF AVAILABLE POR DATA 31.70 Years | 11,579 Days DATA GAPS IN POR 10/22/2010 ‐ 01/17/2012 STAGE GAGE TYPE Pressure Transducer STAGE GAGE ELEVATION ‐0.64 feet Gage Height STAFF GAGES 2 CREST STAGE GAGES 2 ZERO GAGE HEIGHT ELEVATION 1,302.14 feet NAVD88 POINT OF ZERO FLOW ‐1.2 feet Gage Height EXTREME FOR PERIOD OF RECORD 3,162 cfs | 4.96 feet | 09/08/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 295 Watershed Map EMF at Queen Creek Road - water year peaks 3,500 Discharge (cfs) 3,000 2,500 2,000 1,500 1,000 500 0 1985 1990 1995 2000 2005 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 296 2010 2015 2020 2025 WY2020 Events Date of Peak 11/22/2019 11/29/2019 12/26/2019 12/28/2019 02/11/2020 02/23/2020 03/12/2020 03/13/2020 03/19/2020 Peak Gage Height (feet) 1.67 2.02 0.05 ‐0.05 0.33 0.15 0.13 ‐0.20 1.12 Peak Discharge (cfs) 514 695 43 36 77 51 49 27 277 Hydrograph of peak WY 2020 flow event, 11/29/2019 Flood Flow Frequency Flood Flow Frequency N=32, HEC‐WRC computation (based on 32 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 863 2,040 2,930 3,820 4,930 5,720 NOTE(1): These results are based on limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 297 EMF at Queen Creek Road, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 52 2 2 3 4 5 6 7 8 9 10 11 30 13 12 44 13 17 14 11 15 16 17 18 47 19 177 20 5 156 21 191 123 22 367 1 108 23 63 44 50 24 8 11 25 1 26 32 27 21 28 26 29 258 30 346 --31 ---------------------------------------------------------------------------------------TOTAL 0 1238 135 0 86 747 0 0 0 0 0 0 MEAN 0 41 4 0 3 24 0 0 0 0 0 0 MAX 0 695 94 0 77 277 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 2456 267 0 171 1481 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 2206 MEAN 6 MAX 695 MIN 0 AC_FT 4376 FCDMC Annual Surface Water Report, Water Year 2020 Page 298 East Maricopa Floodway at Arizona Avenue, ID #35507 Site Data LOCATION On Arizona Avenue (SR 587) about 2 miles south of Sun Lakes DRAINAGE AREA 668 mi2(including Queen Creek) STREAM TYPE Engineered Channel JURISDICTION Gila River Indian Community WATERSHED Lower East Maricopa Floodway SECTION/TOWNSHIP/RANGE S16 T3S R5E LATITUDE N 33° 10' 07.8" | +33.16882 LONGITUDE W 111° 50' 27.7" | ‐111.84102 STREAMGAGE INSTALLATION DATE 02/10/1989 ‐ WY 1989 AVAILABLE PERIOD OF RECORD (POR) 02/10/1989 ‐ Current LENGTH OF AVAILABLE POR DATA 31.64 Years | 11,556 Days DATA GAPS IN POR None STAGE GAGE ELEVATION ‐0.15 feet Gage Height STAFF GAGES 3 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,210.50 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 5,536 cfs | 4.07 feet | 01/11/1993 FCDMC Annual Surface Water Report, Water Year 2020 Page 299 Watershed Map EMF at Arizona Avenue - water year peaks 6,000 Discharge (cfs) 5,000 4,000 3,000 2,000 1,000 0 1985 1990 1995 2000 2005 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 300 2010 2015 2020 2025 WY2020 Events Date of Peak 11/29/2019 12/25/2019 Peak Gage Height (feet) 1.67 0.87 Peak Discharge (cfs) 558 253 Hydrograph of peak WY 2020 flow event, 11/29/2019 Flood Flow Frequency Flood Flow Frequency N=32, HEC‐WRC computation (based on 32 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 344 1,030 1,760 2,670 4,180 5,560 NOTE(1): These results are based on limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 301 EMF at Arizona Avenue, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 140 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 94 26 27 28 29 127 30 417 --31 ---------------------------------------------------------------------------------------TOTAL 0 544 234 0 0 0 0 0 0 0 0 0 MEAN 0 18 8 0 0 0 0 0 0 0 0 0 MAX 0 558 359 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 1080 464 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 778 MEAN 2 MAX 558 MIN 0 AC_FT 1543 FCDMC Annual Surface Water Report, Water Year 2020 Page 302 Estrella Fan, ID #84207 Site Data LOCATION Located in northwest part of the Estrella Mountains DRAINAGE AREA 1.0 mi2 STREAM TYPE Natural Stream JURISDICTION Goodyear, Arizona WATERSHED Waterman SECTION/TOWNSHIP/RANGE S12 T2S R1W LATITUDE N 33° 16' 10.1" | +33.26949 LONGITUDE W 112° 19' 15.3" | ‐112.32091 STREAMGAGE INSTALLATION DATE 04/30/1993 ‐ WY 1993 AVAILABLE PERIOD OF RECORD (POR) 04/30/1993 ‐ Current LENGTH OF AVAILABLE POR DATA 27.42 Years | 10,016 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.00 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 6 ‐ not related to transducer gage height ZERO GAGE HEIGHT ELEVATION 1,446.87 feet NAVD88 POINT OF ZERO FLOW 0.2 feet Gage Height EXTREME FOR PERIOD OF RECORD 508 cfs | 1.60 feet | 09/08/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 303 Watershed Map Estrella Fan - water year peaks 600 Discharge (cfs) 500 400 300 200 100 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 304 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No runoff events occurred in Water Year 2020. Flood Flow Frequency Flood Flow Frequency HEC‐1 Analysis, 1997 2‐year 5‐year 10‐year 25‐year 50‐year 100‐year 310 860 1,280 1,800 2,250 2,710 FCDMC Annual Surface Water Report, Water Year 2020 Page 305 Estrella Fan, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 --3 4 --5 6 7 8 9 10 11 --12 13 14 15 16 17 18 19 20 21 --22 23 24 25 26 --27 28 29 --30 ----31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 306 Flying E Wash, ID #51707 Site Data LOCATION About 1 mile west of Vulture Mine Road on US 60 DRAINAGE AREA 8.5 mi2 STREAM TYPE Natural Stream JURISDICTION Wickenburg, Arizona WATERSHED Lower Hassayampa SECTION/TOWNSHIP/RANGE S09 T7N R5W LATITUDE N 33° 57' 44.0" | +33.96223 LONGITUDE W 112° 46' 58.5" | ‐112.78291 STREAMGAGE INSTALLATION DATE 07/12/1994 ‐ WY 1994 AVAILABLE PERIOD OF RECORD (POR) 07/12/1994 ‐ Current LENGTH OF AVAILABLE POR DATA 26.22 Years | 9,578 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.00 feet Gage Height STAFF GAGES 1 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 2,283.20 feet NAVD88 POINT OF ZERO FLOW 0.4 feet Gage Height EXTREME FOR PERIOD OF RECORD 5,267 cfs | 7.07 feet | 07/18/2015 FCDMC Annual Surface Water Report, Water Year 2020 Page 307 Watershed Map Flying E Wash - water year peaks 6,000 Discharge (cfs) 5,000 4,000 3,000 2,000 1,000 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 308 2015 2020 WY2020 Events Date of Peak Peak Gage Height (feet) Unknown (see Note) 2.80 Note: Peak recovered from crest‐stage gage, but date of event is uncertain. Peak Discharge (cfs) 1,242 Hydrograph of peak WY 2020 flow event, No runoff data available for peak runoff event.. Flood Flow Frequency Flood Flow Frequency N=27, HEC‐WRC computation (based on 27 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 253 1,110 2,200 3,700 6,320 8,800 NOTE: These results are based on limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 309 Flying E Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 --14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 310 Ford Canyon Wash, ID #86207 Site Data LOCATION Located in the north part of White Tanks Regional Park DRAINAGE AREA 4.3 mi2 STREAM TYPE Natural Stream JURISDICTION Maricopa County, Arizona WATERSHED White Tanks B SECTION/TOWNSHIP/RANGE S18 T3N R2W LATITUDE N 33° 35' 47.3" | +33.59648 LONGITUDE W 112° 29' 57.3" | ‐112.49925 STREAMGAGE INSTALLATION DATE 02/05/2002 ‐ WY 2002 AVAILABLE PERIOD OF RECORD (POR) 02/05/2002 ‐ Current LENGTH OF AVAILABLE POR DATA 18.65 Years | 6,813 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.72 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,468.00 feet NAVD88 POINT OF ZERO FLOW ‐0.3 feet Gage Height EXTREME FOR PERIOD OF RECORD 1,682 cfs | 4.37 feet | 09/08/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 311 Watershed Map Ford Canyon Wash - water year peaks 1,800 Discharge (cfs) 1,600 1,400 1,200 1,000 800 600 400 200 0 2000 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 312 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Discharge (cfs) 03/13/2020 1.56 104 Hydrograph of peak WY 2020 flow event, 03/13/2020 Flood Flow Frequency Flood Flow Frequency Based on USGS Streamstats 2‐year 5‐year 10‐year 25‐year 50‐year 100‐year 222 637 1,090 1,700 2,440 3,350 FCDMC Annual Surface Water Report, Water Year 2020 Page 313 Ford Canyon Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 14 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 118 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 28 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 14 MEAN 0 MAX 118 MIN 0 AC_FT 28 FCDMC Annual Surface Water Report, Water Year 2020 Page 314 Fourth of July Wash, ID #41207 Site Data LOCATION Western Maricopa County about 20 miles west of Arlington DRAINAGE AREA 3.7 mi2 STREAM TYPE Natural Stream JURISDICTION Maricopa County, Arizona WATERSHED Lower Gila SECTION/TOWNSHIP/RANGE S01 T2S R9W LATITUDE N 33° 16' 39.5" | +33.27763 LONGITUDE W 113° 07' 47.1" | ‐113.12976 STREAMGAGE INSTALLATION DATE 03/14/2002 ‐ WY 2002 AVAILABLE PERIOD OF RECORD (POR) 03/14/2002 ‐ Current LENGTH OF AVAILABLE POR DATA 18.55 Years | 6,776 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.20 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,110.00 feet NAVD88 POINT OF ZERO FLOW ‐0.25 feet Gage Height EXTREME FOR PERIOD OF RECORD 2,150 cfs | 4.35 feet | 08/30/2006 FCDMC Annual Surface Water Report, Water Year 2020 Page 315 Watershed Map Fourth of July Wash - water year peaks Discharge (cfs) 2,500 2,000 1,500 1,000 500 0 2000 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 316 2020 2025 WY2020 Events Date of Peak 11/29/2019 03/12/2020 Peak Gage Height (feet) 2.20 0.83 Peak Discharge (cfs) 781 234 Hydrograph of peak WY 2020 flow event, 11/29/2019 Flood Flow Frequency Flood Flow Frequency N=19, HEC‐WRC computation (based on 19 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 843 1,440 1,850 2,240 2,730 3,100 NOTE: These results are based on very limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 317 Fourth of July Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 15 13 14 14 --15 --16 --17 --18 --19 --20 21 22 23 24 25 26 27 28 29 80 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 80 0 0 0 29 0 0 0 0 0 0 MEAN 0 3 0 0 0 1 0 0 0 0 0 0 MAX 0 781 0 0 0 234 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 158 0 0 0 57 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 109 MEAN 0 MAX 781 MIN 0 AC_FT 216 FCDMC Annual Surface Water Report, Water Year 2020 Page 318 Freestone Basin, ID #32807 Site Data LOCATION Near Lindsay Road south of Guadalupe Road DRAINAGE AREA 2.2 mi2 STREAM TYPE Flood control basin JURISDICTION Gilbert, Arizona WATERSHED Lower East Maricopa Floodway SECTION/TOWNSHIP/RANGE S08 T1S R6E LATITUDE N 33° 21' 26.4" | +33.35734 LONGITUDE W 111° 46' 21.9" | ‐111.77274 STREAMGAGE INSTALLATION DATE 12/19/1995 ‐ WY 1996 AVAILABLE PERIOD OF RECORD (POR) 12/19/1995 ‐ Current LENGTH OF AVAILABLE POR DATA 24.79 Years | 9,053 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 2.10 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,219.41 feet NAVD88 POINT OF ZERO FLOW None ‐ Pump Control SPILLWAY CREST ELEVATION None TOP OF BASIN ELEVATION 25.0 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 319 Location Map Freestone Basin - water year peaks Volume (acre-feet) 60.0 50.0 40.0 30.0 20.0 10.0 0.0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 320 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Volume (ac‐ft) Percent Spillway Capacity 12/10/2019 07/24/2020 09/02/2020 6.84 5.59 4.44 8.6 4.0 1.5 8.6 4.0 1.5 Hydrograph of peak WY 2020 impoundment event, 12/10/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 321 Freestone Basin, volume data Volume, in acre feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 3 1 2 3 1 3 2 4 2 5 1 6 1 7 1 8 1 9 2 10 5 11 1 3 12 4 13 2 14 15 16 17 1 18 1 19 1 2 20 2 1 21 2 22 1 2 23 3 24 1 1 25 3 2 26 5 27 6 28 8 29 6 7 30 6 4 --1 31 ---------------------------------------------------------------------------------------MEAN 0 1 2 0 0 0 0 0 0 0 0 0 MAX 0 8 9 0 4 4 1 1 0 4 1 2 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 9 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 322 Freestone Basin, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2.1 2.1 5.3 2.1 2.1 2.2 2.1 3.1 3.1 3.1 3.1 3.3 2 2.1 2.1 5.0 2.2 2.1 2.3 2.6 3.1 3.1 3.1 3.1 3.4 3 2.1 2.1 4.7 2.4 2.1 2.1 2.4 3.1 3.1 3.1 3.1 3.1 4 2.1 2.1 4.5 2.3 2.1 2.1 2.1 3.1 3.1 3.1 3.1 3.1 5 2.1 2.1 4.2 2.2 2.1 2.1 2.1 3.1 3.1 3.1 3.1 3.1 6 2.1 2.1 3.1 2.1 2.1 2.1 2.5 3.1 3.1 3.1 3.1 3.1 7 2.1 2.1 2.2 2.1 2.1 2.1 2.4 3.1 3.1 3.1 3.1 3.3 8 2.1 2.1 3.3 2.1 2.1 2.1 2.2 3.1 3.1 3.1 3.1 3.2 9 2.1 2.1 4.0 2.1 2.1 2.1 2.5 3.2 3.1 3.1 3.1 3.1 10 2.1 2.1 5.5 2.1 2.5 2.3 2.3 3.2 3.1 3.1 3.1 3.1 11 2.1 2.1 2.8 2.1 3.1 4.8 2.4 3.1 3.1 3.1 3.1 3.1 12 2.1 2.1 2.4 2.1 2.1 5.5 2.7 3.1 3.1 3.1 3.1 3.1 13 2.1 2.1 2.1 2.1 2.1 3.8 2.1 3.1 3.1 3.1 3.1 3.2 14 2.1 2.1 2.1 2.1 2.1 2.1 2.1 3.1 3.1 3.1 3.1 3.1 15 2.1 2.1 2.1 2.1 2.1 2.1 2.1 3.1 3.1 3.1 3.1 3.1 16 2.1 2.1 2.1 2.1 2.1 2.3 2.1 3.1 3.1 3.1 3.1 3.1 17 2.1 2.1 2.1 2.1 3.3 2.1 2.1 3.1 3.1 3.1 3.2 3.1 18 2.1 2.1 2.1 2.1 4.0 2.7 2.1 3.1 3.1 3.1 3.1 3.1 19 2.1 2.7 2.1 2.1 4.0 4.6 2.1 3.1 3.1 3.1 3.1 3.1 20 2.1 4.6 2.1 2.1 2.7 3.1 2.1 3.1 3.1 3.1 3.1 3.1 21 2.1 4.2 2.1 2.1 2.1 2.1 2.1 3.1 3.1 3.1 3.1 3.1 22 2.1 3.1 2.1 2.1 4.0 2.1 2.1 3.1 3.1 3.1 3.1 2.6 23 2.1 2.1 2.1 2.1 4.8 2.3 2.1 3.1 3.1 3.1 3.2 2.1 24 2.1 2.1 3.1 2.1 3.1 2.1 2.1 3.1 3.1 3.4 3.1 2.1 25 2.1 2.1 4.9 2.1 3.0 2.1 2.1 3.1 3.1 4.0 3.1 2.1 26 2.1 2.1 5.8 2.1 2.1 2.2 2.1 3.1 3.1 3.1 3.1 2.1 27 2.1 2.1 6.3 2.1 2.1 2.1 2.1 3.1 3.1 3.1 3.1 2.1 28 2.1 2.1 6.6 2.1 2.1 2.1 2.8 3.1 3.1 3.1 3.1 2.1 29 2.1 5.6 6.4 2.1 2.1 2.1 3.1 3.1 3.1 3.1 3.1 2.1 30 2.1 6.3 4.9 2.1 --2.1 3.1 3.1 3.1 3.1 3.2 2.1 31 2.1 --2.1 2.1 --2.1 --3.1 --3.1 3.1 -------------------------------------------------------------------------------MEAN 2.1 2.6 3.6 2.1 2.6 2.5 2.3 3.1 3.1 3.1 3.1 2.8 MAX 2.1 6.7 6.8 2.5 5.4 5.6 3.3 3.5 3.1 5.6 3.6 4.4 MIN 2.1 2.1 2.1 2.1 2.1 2.1 2.1 3.1 3.1 3.1 3.1 2.1 -----------------------------------------------------------------------------WTR YR 2020 MEAN 2.74 MAX 6.84 MIN 2.10 FCDMC Annual Surface Water Report, Water Year 2020 Page 323 Galloway Wash at Galloway Road, ID #20607 Site Data LOCATION Located on Galloway Road about 1/8 mile north of Cave Creek Road DRAINAGE AREA 6.4 mi2 STREAM TYPE Natural JURISDICTION Cave Creek, Arizona WATERSHED Cave Creek SECTION/TOWNSHIP/RANGE S34 T6N R4E LATITUDE N 33° 49' 54.1" | +33.83170 LONGITUDE W 111° 55' 43.3" | ‐111.92870 STREAMGAGE INSTALLATION DATE 08/16/2016 ‐ WY 2016 AVAILABLE PERIOD OF RECORD (POR) 08/16/2016 ‐ Current LENGTH OF AVAILABLE POR DATA 4.13 Years | 1,507 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.15 feet Gage Height STAFF GAGES 1 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 2,285.00 feet NAVD88 POINT OF ZERO FLOW 0.1 feet Gage Height EXTREME FOR PERIOD OF RECORD 1,518 cfs | 2.52 feet GH | 08/23/2018 FCDMC Annual Surface Water Report, Water Year 2020 Page 324 Watershed Map Discharge (cfs) Galloway Wash at Galloway Road - water year peaks 2000 1800 1600 1400 1200 1000 800 600 400 200 0 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 325 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No runoff recorded in Water Year 2020 Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 326 Galloway Wash at Galloway Road, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 8 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 8 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 327 Gila River at Olberg Road, ID #42007 Site Data LOCATION Near Sacaton on the Gila River Indian Community DRAINAGE AREA 18,784 mi2 STREAM TYPE Natural Stream JURISDICTION Gila River Indian Community, Arizona WATERSHED Gila SECTION/TOWNSHIP/RANGE S12 T4S R6E LATITUDE N 33° 05' 13.4" | +33.08706 LONGITUDE W 111° 41' 13.2" | ‐111.68700 STREAMGAGE INSTALLATION DATE 04/12/1995 ‐ WY 1995 AVAILABLE PERIOD OF RECORD (POR) 04/12/1995 ‐ Current LENGTH OF AVAILABLE POR DATA 25.47 Years | 9,304 Days DATA GAPS IN POR 09/19/2016 – 10/31/2016 STAGE GAGE ELEVATION 0.25 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,284.69 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 5,867 cfs | 6.16 feet | 08/02/2006 FCDMC Annual Surface Water Report, Water Year 2020 Page 328 Watershed map Gila River at Olberg Road - water year peaks 7,000 Discharge (cfs) 6,000 5,000 4,000 3,000 2,000 1,000 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 329 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No runoff recorded in Water Year 2020. Flood Flow Frequency Flood Flow Frequency N=26, HEC‐WRC computation (based on 26 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 390 1,490 2,760 4,410 7,130 9,590 FCDMC Annual Surface Water Report, Water Year 2020 Page 330 Gila River at Olberg Road, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 --2 ----3 --4 --5 6 7 8 9 10 --11 --12 --13 ----14 --15 --16 17 18 19 --20 21 22 23 24 25 26 27 28 29 30 ----31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 *USGS maintained a gage at this site prior to October 1, 1998 (09478350) FCDMC Annual Surface Water Report, Water Year 2020 Page 331 Gila River at Maricopa Road, ID #41707 Site Data LOCATION On Maricopa Road (SR 347) about 5 miles north of Maricopa DRAINAGE AREA 20,312 mi2 STREAM TYPE Natural Stream JURISDICTION Gila River Indian Community, Arizona WATERSHED Lower East Maricopa Floodway SECTION/TOWNSHIP/RANGE S13 T3S R3E LATITUDE N 33° 10' 14.7" | +33.17076 LONGITUDE W 112° 00' 21.7" | ‐112.00601 STREAMGAGE INSTALLATION DATE 04/09/1995 ‐ WY 1995 AVAILABLE PERIOD OF RECORD (POR) 04/09/1995 ‐ Current LENGTH OF AVAILABLE POR DATA 25.48 Years | 9,307 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 1.36 feet Gage Height CREST STAGE GAGES 2 (USGS maintains) ZERO GAGE HEIGHT ELEVATION 1,115.94 feet NAVD88 POINT OF ZERO FLOW 1.7 feet Gage Height EXTREME FOR PERIOD OF RECORD 8,051 cfs | 3.99 feet | 07/31/2006 FCDMC Annual Surface Water Report, Water Year 2020 Page 332 Watershed for Gila River at Maricopa Road Gila River at Maricopa Road - water year peaks 9,000 Discharge (cfs) 8,000 7,000 6,000 5,000 4,000 3,000 2,000 1,000 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 333 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No runoff recorded in Water Year 2020. Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 334 Gila River at Maricopa Road, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 --9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 NOTE: The USGS maintains a gage at this site in cooperation with ADOT. See USGS Gage #09479350. See USGS Water‐Data Report AZ‐16‐1 for official data for this site. FCDMC Annual Surface Water Report, Water Year 2020 Page 335 Gila River at 116th Avenue, ID #70707 Site Data LOCATION Located on the Avondale Boulevard bridge crossing of the Gila River DRAINAGE AREA 43,300 mi2 STREAM TYPE Natural Stream JURISDICTION Avondale, Arizona WATERSHED Lower ACDC / South Mountain SECTION/TOWNSHIP/RANGE S36 T1N R1W LATITUDE N 33° 22' 58.2" | +33.38282 LONGITUDE W 112° 18' 29.2" | ‐112.30812 STREAMGAGE INSTALLATION DATE 12/16/1998 ‐ WY 1999 AVAILABLE PERIOD OF RECORD (POR) 12/16/1998 ‐ Current LENGTH OF AVAILABLE POR DATA 21.79 Years | 7,960 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 1.15 feet Gage Height STAFF GAGES 1 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 929.74 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 49,394 cfs | 9.15 feet | 02/13/2005 FCDMC Annual Surface Water Report, Water Year 2020 Page 336 Watershed Map Gila River at 116th Avenue - water year peaks 60,000 Discharge (cfs) 50,000 40,000 30,000 20,000 10,000 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 337 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No flow above base flow in Water Year 2020. Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 338 Gila River at 116th Avenue, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 339 Gila River at Estrella Parkway, ID #83807 Site Data LOCATION Located at Estrella Parkway crossing of the Gila River DRAINAGE AREA 45,585 mi2 STREAM TYPE Natural Stream JURISDICTION Goodyear, Arizona WATERSHED Waterman SECTION/TOWNSHIP/RANGE S31 T1N R1W LATITUDE N 33° 23' 20.6" | +33.38908 LONGITUDE W 112° 23' 32.9" | ‐112.39248 STREAMGAGE INSTALLATION DATE 12/02/1992 ‐ WY 1993 AVAILABLE PERIOD OF RECORD (POR) 12/02/1992 ‐ Current LENGTH OF AVAILABLE POR DATA 27.83 Years | 10,165 Days DATA GAPS IN POR 01/08/1993 ‐ 03/01/1993 STAGE GAGE ELEVATION 1.92 feet Gage Height STAFF GAGES 2 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 885.59 feet NAVD88 POINT OF ZERO FLOW 1.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 75,883 cfs | 16.45 feet | 02/16/1995 FCDMC Annual Surface Water Report, Water Year 2020 Page 340 Watershed Map Gila River at Estrella Parkway - water year peaks 80,000 Discharge (cfs) 70,000 60,000 50,000 40,000 30,000 20,000 10,000 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 341 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No runoff recorded in Water Year 2020. Flood Flow Frequency Flood Flow Frequency From Study of Modified Roosevelt Dam Table 2‐4 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 20,000 50,000 84,000 170,000 217,000 FCDMC Annual Surface Water Report, Water Year 2020 Page 342 Gila River at Estrella Parkway, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 343 Golden Eagle Park Dam, ID #78007 Site Data LOCATION In Golden Eagle Park, near Fountain Hills High School DRAINAGE AREA 7.13 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Fountain Hills, Arizona WATERSHED Lower Verde SECTION/TOWNSHIP/RANGE S09 T3N R6E LATITUDE N 33° 37' 07.7" | +33.61880 LONGITUDE W 111° 44' 06.2" | ‐111.73507 STREAMGAGE INSTALLATION DATE 12/12/1996 ‐ WY 1997 AVAILABLE PERIOD OF RECORD (POR) 12/12/1996 ‐ Current LENGTH OF AVAILABLE POR 23.80 Years | 8,694 Days DATA GAPS IN POR 05/01/2000 ‐ 03/05/2001 (station was located on inflow wash due to construction) STAGE GAGE ELEVATION 3.05 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,696.75 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY CREST ELEVATION 20.26 feet Gage Height TOP OF DAM ELEVATION 31.9 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 344 Watershed Map Golden Eagle Park Dam - water year peaks 45 Volume (acre-feet) 40 35 30 25 20 15 10 5 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 345 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Volume (ac‐ft) Percent Spillway Capacity 02/10/2020 6.73 0.7 0.8 Hydrograph of peak WY 2020 impoundment event, 02/10/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 346 Golden Eagle Park Dam, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 27 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 14 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 546 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 27 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 14 MEAN 0 MAX 546 MIN 0 AC_FT 27 FCDMC Annual Surface Water Report, Water Year 2020 Page 347 Golden Eagle Park Dam, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 1 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 1 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 348 Golden Eagle Park Dam, stage data Station Number: 5978 Name: Golden Eagle Park Da Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 2 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 4 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 5 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 6 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 7 3.0 3.0 3.0 3.0 --3.0 3.0 3.0 3.0 3.0 3.0 3.0 8 3.0 3.0 3.0 3.0 --3.0 3.0 3.0 3.0 3.0 3.0 3.0 9 3.0 3.0 3.0 3.0 --3.0 3.0 3.0 3.0 3.0 3.0 3.0 10 3.0 3.0 3.0 3.0 3.2 3.0 3.0 3.0 3.0 3.0 3.0 3.0 11 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 12 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 13 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 14 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 15 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 16 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 17 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 18 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 19 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 20 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 21 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 22 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 23 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 24 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 0.0 3.0 3.0 25 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 26 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 27 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 28 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 29 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 30 3.0 3.0 3.0 3.0 --3.0 3.0 3.0 3.0 3.0 3.0 3.0 31 3.0 --3.0 3.0 --3.0 --3.0 --3.0 3.0 -------------------------------------------------------------------------------MEAN 3.0 3.0 3.0 3.0 3.1 3.0 3.0 3.0 3.0 3.0 3.0 3.0 MAX 3.0 3.0 3.0 3.0 6.7 3.0 3.0 3.0 3.0 3.0 3.0 3.0 MIN 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 3.05 MAX 6.73 MIN 3.05 FCDMC Annual Surface Water Report, Water Year 2020 Page 349 Grand Avenue at 27th Avenue Basin, ID #3807 Site Data LOCATION Located near north and east of Thomas Road and 27th Ave DRAINAGE AREA 2.1 mi2 STREAM TYPE Flood control basin JURISDICTION Phoenix, Arizona WATERSHED Lower ACDC SECTION/TOWNSHIP/RANGE S25 T2N R2E LATITUDE N 33° 28' 54.8" | +33.48189 LONGITUDE W 112° 06' 58.6" | ‐112.11627 STREAMGAGE INSTALLATION DATE 10/06/2015 ‐ WY 2016 AVAILABLE PERIOD OF RECORD (POR) 10/06/2015 ‐ Current LENGTH OF AVAILABLE POR DATA 4.99 Years | 1,822 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.45 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,089.01 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY CREST ELEVATION No spillway TOP OF BASIN ELEVATION 8.6 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 350 Watershed Map Volume (acre-feet) Grand Avenue at 27th Avenue Basin - water year peaks 20 18 16 14 12 10 8 6 4 2 0 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 351 2025 WY2020 Events Date of Peak 11/20/2019 11/29/2019 12/08/2019 12/16/2019 12/25/2019 01/21/2020 02/11/2020 02/22/2020 03/11/2020 03/12/2020 03/13/2020 Peak Gage Height (feet) 2.02 2.20 1.17 1.65 1.95 0.83 2.00 2.17 1.60 2.37 2.52 Peak Volume (ac‐ft) 6.3 6.9 3.5 5.0 6.0 2.1 6.2 6.8 4.9 7.5 8.0 Hydrograph of peak WY 2020 impoundment event, 03/13/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 352 Percent Spillway Capacity 16.8 18.5 9.4 13.6 16.2 5.5 16.6 18.2 13.1 20.1 21.5 Grand Avenue at 27th Avenue Basin, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 1 2 3 3 3 4 2 5 1 6 7 8 2 9 1 10 11 3 3 12 3 3 13 3 4 14 3 3 15 2 3 16 1 2 3 17 2 3 18 3 19 1 3 20 3 3 21 3 3 22 3 2 2 23 3 3 2 24 3 2 3 1 25 2 3 3 26 2 3 3 27 1 3 2 28 3 2 29 3 3 30 3 2 --31 --2 -------------------------------------------------------------------------------------TOTAL 2 26 39 2 33 38 0 0 0 0 0 0 MEAN 0 1 1 0 1 1 0 0 0 0 0 0 MAX 2 3 3 2 3 4 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 4 52 77 4 66 75 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 140 MEAN 0 MAX 4 MIN 0 AC_FT 278 FCDMC Annual Surface Water Report, Water Year 2020 Page 353 Grand Avenue at 27th Avenue Basin, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 3 5 3 2 2 2 5 2 3 1 5 2 4 3 5 3 6 2 7 1 8 3 9 3 10 2 11 1 6 5 12 5 7 13 5 7 14 5 7 15 4 6 16 2 3 6 17 3 2 5 18 2 2 5 19 1 1 1 6 20 5 5 21 6 1 5 22 6 2 5 4 23 5 1 6 3 24 5 3 5 3 25 4 6 5 2 26 3 6 5 1 27 3 5 4 28 2 5 3 29 5 5 2 30 6 4 --31 --3 -------------------------------------------------------------------------------------MEAN 0 2 3 0 2 3 0 0 0 0 0 0 MAX 3 7 6 3 7 8 0 0 1 0 1 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 1 MAX 8 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 354 Grand Avenue at 27th Avenue Basin, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 1.0 0.5 1.7 1.0 0.5 0.7 0.5 0.5 0.5 0.5 0.5 0.5 2 0.8 0.5 1.6 0.8 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 3 0.5 0.5 1.5 0.7 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 4 0.5 0.5 1.2 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 5 0.5 0.5 0.9 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 6 0.5 0.5 0.8 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 7 0.5 0.5 0.7 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 8 0.5 0.5 1.1 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 9 0.5 0.5 0.9 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 10 0.5 0.5 0.8 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 11 0.5 0.5 0.6 0.5 1.8 1.8 0.5 0.5 0.5 0.5 0.5 0.5 12 0.5 0.5 0.5 0.5 1.8 2.1 0.5 0.5 0.5 0.5 0.5 0.5 13 0.5 0.5 0.5 0.5 1.7 2.3 0.5 0.5 0.5 0.5 0.5 0.5 14 0.5 0.5 0.5 0.5 1.6 2.1 0.5 0.5 0.5 0.5 0.5 0.5 15 0.5 0.5 0.5 0.5 1.3 1.9 0.5 0.5 0.5 0.5 0.5 0.5 16 0.5 0.5 1.0 0.5 1.0 1.8 0.5 0.5 0.5 0.5 0.5 0.5 17 0.5 0.5 1.1 0.5 0.9 1.7 0.5 0.5 0.5 0.5 0.5 0.5 18 0.5 0.5 0.8 0.5 0.7 1.6 0.5 0.5 0.5 0.5 0.5 0.5 19 0.5 0.7 0.7 0.5 0.5 1.8 0.5 0.5 0.5 0.5 0.5 0.5 20 0.5 1.7 0.5 0.5 0.5 1.7 0.5 0.5 0.5 0.5 0.5 0.5 21 0.5 2.0 0.5 0.7 0.5 1.6 0.5 0.5 0.5 0.5 0.5 0.5 22 0.5 1.9 0.5 0.8 1.6 1.3 0.5 0.5 0.5 0.5 0.5 0.5 23 0.5 1.8 0.5 0.6 1.9 1.1 0.5 0.5 0.5 0.5 0.5 0.5 24 0.5 1.7 1.3 0.5 1.8 0.9 0.5 0.5 0.5 0.5 0.5 0.5 25 0.5 1.5 1.9 0.5 1.7 0.8 0.5 0.5 0.5 0.5 0.5 0.5 26 0.5 1.1 1.8 0.5 1.6 0.5 0.5 0.5 0.5 0.5 0.5 0.5 27 0.5 0.9 1.7 0.5 1.3 0.5 0.5 0.5 0.5 0.5 0.5 0.5 28 0.5 0.8 1.7 0.5 1.0 0.5 0.5 0.5 0.5 0.5 0.5 0.5 29 0.5 1.8 1.6 0.5 0.9 0.5 0.5 0.5 0.5 0.5 0.5 0.5 30 0.5 1.8 1.5 0.5 --0.5 0.5 0.5 0.5 0.5 0.5 0.5 31 0.5 --1.2 0.5 --0.5 --0.5 --0.5 0.5 -------------------------------------------------------------------------------MEAN 0.5 0.9 1.0 0.5 1.0 1.0 0.5 0.5 0.5 0.5 0.5 0.5 MAX 1.0 2.2 1.9 1.0 2.2 2.5 0.5 0.5 0.5 0.5 0.6 0.5 MIN 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.63 MAX 2.52 MIN 0.45 FCDMC Annual Surface Water Report, Water Year 2020 Page 355 Granite Reef Diversion, ID #75007 Site Data LOCATION Located along Bush Highway near Granite Reef Dam DRAINAGE AREA 33.2 mi2 STREAM TYPE Engineered Channel JURISDICTION Maricopa County, Arizona WATERSHED Lower Verde SECTION/TOWNSHIP/RANGE S18 T2N R7E LATITUDE N 33° 30' 43.1" | +33.51197 LONGITUDE W 111° 41' 01.9" | ‐111.68386 STREAMGAGE INSTALLATION DATE 07/21/2005 ‐ WY 2005 AVAILABLE PERIOD OF RECORD (POR) 07/21/2005 ‐ Current LENGTH OF POR 15.20 Years | 5,551 Days DATA GAPS IN POR None STAGE GAGE ELEVATION ‐0.25 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,336.36 feet NAVD88 POINT OF ZERO FLOW ‐0.4 feet Gage Height EXTREME FOR PERIOD OF RECORD 770 cfs | 1.78 Feet | 03/07/2010 FCDMC Annual Surface Water Report, Water Year 2020 Page 356 Watershed Map Granite Reef Diversion - water year peaks 900 Discharge (cfs) 800 700 600 500 400 300 200 100 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 357 2020 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) 12/09/2019 1.02 77 Hydrograph of peak WY 2020 flow event, 12/09/2019 Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 358 Granite Reef Diversion, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 --5 6 7 --8 --9 2 --10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 1 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 77 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 2 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 1 MEAN 0 MAX 77 MIN 0 AC_FT 2 FCDMC Annual Surface Water Report, Water Year 2020 Page 359 Granite Reef Wash, ID #57507 Site Data LOCATION On McDowell Road near Granite Reef Road DRAINAGE AREA 7.2 mi2 STREAM TYPE 1‐Barrel Culvert JURISDICTION Scottsdale, Arizona WATERSHED Lower Indian Bend SECTION/TOWNSHIP/RANGE S36 T2N R4E LATITUDE N 33° 27' 57.6" | +33.46599 LONGITUDE W 111° 53' 54.9" | ‐111.89857 STREAMGAGE INSTALLATION DATE 06/26/2007 ‐ WY 2007 AVAILABLE PERIOD OF RECORD (POR) 06/26/2007 ‐ Current LENGTH OF AVAILABLE POR DATA DATA 13.27 Years | 4,846 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 1.28 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,202.72 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 235 cfs | 7.76 feet | 09/08/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 360 Watershed Map Granite Reef Wash - water year peaks Discharge (cfs) 250 200 150 100 50 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 361 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/21/2019 11/21/2019 11/29/2019 12/09/2019 12/24/2019 12/25/2019 12/27/2019 02/10/2020 02/22/2020 03/10/2020 03/11/2020 03/12/2020 03/13/2020 03/13/2020 03/18/2020 07/24/2020 Peak Gage Height 2.67 2.25 2.62 3.89 1.87 1.80 2.17 2.42 2.65 2.92 2.05 3.19 2.27 4.84 2.55 2.92 2.27 Peak Discharge (cfs) 17 13 16 31 9 9 12 14 16 19 11 22 13 45 15 19 13 Hydrograph of peak WY 2020 flow event, 03/13/2020 Flood Flow Frequency Flood Flow Frequency N=14, HEC‐WRC computation (based on 14 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 56 90 123 164 236 307 NOTE(1): These results are based on very limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 362 Granite Reef Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 1 8 1 9 1 10 1 1 11 6 9 12 7 13 10 14 1 15 16 17 18 3 19 1 20 5 21 6 22 1 7 23 4 24 4 1 25 7 26 5 27 6 28 29 5 30 --31 ---------------------------------------------------------------------------------------TOTAL 2 17 24 0 18 32 0 0 0 1 0 0 MEAN 0 1 1 0 1 1 0 0 0 0 0 0 MAX 5 31 14 0 19 45 0 0 0 13 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 3 35 47 0 35 63 0 0 0 2 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 93 MEAN 0 MAX 45 MIN 0 AC_FT 185 FCDMC Annual Surface Water Report, Water Year 2020 Page 363 Greene Wash at SR84 – ID #64007 Site Data LOCATION On SR 84 between Stanfield and Casa Grande DRAINAGE AREA 1,729 mi2 STREAM TYPE Channelized Natural Stream JURISDICTION Pinal County, Arizona WATERSHED Santa Rosa SECTION/TOWNSHIP/RANGE S21 T6S R4E LATITUDE N 32° 52' 46.1" | +32.87948 LONGITUDE W 111° 56' 01.3" | ‐111.93369 STREAMGAGE INSTALLATION DATE 03/23/1994 ‐ WY 1994 AVAILABLE PERIOD OF RECORD (POR) 03/23/1994 ‐ Current LENGTH OF AVAILABLE POR DATA 26.53 Years | 9,689 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.10 feet Gage Height STAFF GAGES 1 CREST STAGE GAGES 2 ZERO GAGE HEIGHT ELEVATION 1,295.26 feet NAVD88 EXTREME FOR PERIOD OF RECORD 1,391 cfs | 3.67 feet GH | 08/02/2006 FCDMC Annual Surface Water Report, Water Year 2020 Page 364 Watershed Map Greene Wash at SR84 - water year peaks 1,600 Discharge (cfs) 1,400 1,200 1,000 800 600 400 200 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 365 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) No runoff recorded Hydrograph of peak WY 2020 flow event, There were no runoff events in Water Year 2020. Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 366 Greene Wash at SR84, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 367 Guadalupe Road Channel, ID #35707 Site Data LOCATION On Guadalupe Road between Power and Sossaman Roads DRAINAGE AREA 18.6 mi2 STREAM TYPE Engineered Channel JURISDICTION Mesa, Arizona WATERSHED Upper East Maricopa Floodway SECTION/TOWNSHIP/RANGE S06 T1S R7E LATITUDE N 33° 21' 54.8" | +33.36523 LONGITUDE W 111° 40' 34.4" | ‐111.67621 STREAMGAGE INSTALLATION DATE 08/07/1998 ‐ WY 1998 AVAILABLE PERIOD OF RECORD (POR) 08/07/1998 ‐ Current LENGTH OF AVAILABLE POR DATA 22.15 Years | 8,091 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.50 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,345.33 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 940 cfs | 2.88 feet | 07/23/2002 FCDMC Annual Surface Water Report, Water Year 2020 Page 368 Watershed Map Discharge (cfs) Guadalupe Channel - water year peaks 1,000 900 800 700 600 500 400 300 200 100 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 369 2015 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/29/2019 Peak Gage Height (feet) 0.60 1.04 Peak Discharge (cfs) 67 170 Hydrograph of peak WY 2020 flow event, 11/29/2019 Flood Flow Frequency Flood Flow Frequency N=23, HEC‐WRC computation (based on 23 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 339 595 792 997 1,280 1,520 NOTE(1): These results are based on very limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 370 Guadalupe Road Channel, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 14 15 16 14 17 18 14 19 20 2 21 22 23 24 14 25 26 27 28 29 22 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 24 0 0 0 0 0 0 0 0 55 0 MEAN 0 1 0 0 0 0 0 0 0 0 2 0 MAX 0 170 0 0 0 0 0 0 0 0 67 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 48 0 0 0 0 0 0 0 0 110 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 79 MEAN 0 MAX 170 MIN 0 AC_FT 157 FCDMC Annual Surface Water Report, Water Year 2020 Page 371 Guadalupe FRS, ID #68207 Site Data LOCATION Located west of I‐10 and south of Baseline Road DRAINAGE AREA 1.87 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Phoenix, Arizona WATERSHED South Mountain SECTION/TOWNSHIP/RANGE S05 T1S R4E LATITUDE N 33° 22' 19.0" | +33.37194 LONGITUDE W 111° 58' 13.7" | ‐111.97047 STREAMGAGE INSTALLATION DATE 06/29/1989 ‐ WY 1989 AVAILABLE PERIOD OF RECORD (POR) 06/29/1989 ‐ Current LENGTH OF AVAILABLE POR DATA 31.26 Years | 11,417 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.26 feet Gage Height STAFF GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,251.38 feet NAVD88 PZF (CONTROLLED OUTLET) 0.64 feet Gage Height PZF (UNCONTROLLED OUTLET) 9.64 feet Gage Height SPILLWAY ELEVATION 24.64 feet Gage Height TOP OF DAM ELEVATION 32.14 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 372 Watershed Map Guadalupe FRS - water year peaks Volume (acre-feet) 120 100 80 60 40 20 0 1985 1990 1995 2000 2005 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 373 2010 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Volume (ac‐ft) None Hydrograph of peak WY 2020 impoundment event, No impoundments recorded in Water Year 2020. FCDMC Annual Surface Water Report, Water Year 2020 Page 374 Percent Spillway Capacity Guadalupe FRS, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 375 Guadalupe FRS, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 0 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 376 Guadalupe FRS, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 2 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 4 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 5 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 7 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 8 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 9 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 10 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 11 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 12 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 13 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 14 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 15 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 16 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 17 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 18 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 19 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 20 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 21 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 22 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 23 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 24 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 25 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 26 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 27 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 28 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 29 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 30 0.3 0.3 0.3 0.3 --0.3 0.3 0.3 0.3 0.3 0.3 0.3 31 0.3 --0.3 0.3 --0.3 --0.3 --0.3 0.3 -------------------------------------------------------------------------------MEAN 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 MAX 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.4 0.3 MIN 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.26 MAX 0.40 MIN 0.26 FCDMC Annual Surface Water Report, Water Year 2020 Page 377 Harquahala FRS, ID #26007 Site Data LOCATION Located northeast of I‐10 and Salome Highway interchange DRAINAGE AREA 102.3 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Maricopa County, Arizona WATERSHED Lower Centennial SECTION/TOWNSHIP/RANGE S05 T2N R8W LATITUDE N 33° 32' 55.3" | +33.54868 LONGITUDE W 113° 05' 51.8" | ‐113.09772 STREAMGAGE INSTALLATION DATE 03/01/1994 ‐ WY 1994 AVAILABLE PERIOD OF RECORD (POR) 03/01/1994 ‐ Current LENGTH OF AVAILABLE POR DATA 26.59 Years | 9,711 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.38 feet Gage Height STAFF GAGES 7 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,374.89 feet NAVD88 POINT OF ZERO FLOW (CONTROLLED) 0.57 feet Gage Height POINT OF ZERO FLOW (UNCONTROLLED) 14.50 feet Gage Height SPILLWAY ELEVATION 35.7 feet Gage Height TOP OF DAM ELEVATION 46.7 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 378 Watershed Map Harquahala FRS - water year peaks Volume (acre-feet) 600 500 400 300 200 100 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 379 2015 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/29/2019 02/22/2020 03/12/2020 08/30/2020 Peak Gage Height (feet) 1.80 2.14 1.75 2.58 2.43 Peak Volume (ac‐ft) 0.1 0.1 0.1 0.1 0.1 Hydrograph of peak WY 2020 impoundment event, 03/12/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 380 Percent Spillway Capacity 0.0 0.0 0.0 0.0 0.0 Harquahala FRS, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 --15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 381 Harquahala FRS, volume data Volume, in acre feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 --15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 0 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 382 Harquahala FRS, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 1.4 0.4 1.2 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 1.9 2 1.3 0.4 0.9 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 1.8 3 1.2 0.4 0.8 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 1.6 4 1.1 0.4 0.7 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 1.5 5 1.1 0.4 0.6 0.4 0.4 0.4 0.4 0.4 0.0 0.4 0.4 1.4 6 1.0 0.4 0.5 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 1.4 7 0.9 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 1.2 8 0.9 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 1.1 9 0.8 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 1.1 10 0.8 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 1.0 11 0.7 0.4 0.4 0.4 0.8 0.4 0.4 0.4 0.4 0.4 0.4 0.9 12 0.7 0.4 0.4 0.4 0.7 1.6 0.4 0.4 0.4 0.4 0.4 0.8 13 0.6 0.4 0.4 0.4 0.5 2.4 0.4 0.4 0.4 0.4 0.4 0.8 14 0.6 0.4 0.4 0.4 0.4 2.0 0.4 --0.4 0.4 0.4 0.8 15 0.5 0.4 0.4 0.4 0.4 1.7 0.4 0.4 0.4 0.4 0.4 0.7 16 0.5 0.4 0.4 0.4 0.4 1.5 0.4 0.4 0.4 0.4 0.4 0.6 17 0.5 0.4 0.4 0.4 0.4 1.3 0.4 0.4 0.4 0.4 0.4 0.6 18 0.4 0.4 0.4 0.4 0.4 1.1 0.4 0.4 0.4 0.4 0.4 0.5 19 0.4 0.4 0.4 0.4 0.4 1.0 0.4 0.4 0.4 0.4 0.4 0.4 20 0.4 0.9 0.4 0.4 0.4 0.9 0.4 0.4 0.4 0.4 0.4 0.4 21 0.4 1.4 0.4 0.4 0.4 0.8 0.4 0.4 0.4 0.4 0.4 0.4 22 0.4 1.1 0.4 0.4 1.0 0.7 0.4 0.4 0.4 0.4 0.4 0.4 23 0.4 0.9 0.4 0.4 1.4 0.6 0.4 0.4 0.4 0.4 0.4 0.4 24 0.4 0.7 0.4 0.4 1.1 0.5 0.4 0.4 0.4 0.4 0.4 0.4 25 0.4 0.6 0.4 0.4 0.9 0.5 0.4 0.4 0.4 0.4 0.4 0.4 26 0.4 0.5 0.4 0.4 0.8 0.4 0.4 0.4 0.4 0.4 0.4 0.4 27 0.4 0.4 0.4 0.4 0.6 0.4 0.4 0.4 0.4 0.4 0.4 0.4 28 0.4 0.4 0.4 0.4 0.5 0.4 0.4 0.4 0.4 0.4 0.4 0.4 29 0.4 1.8 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 30 0.4 1.5 0.4 0.4 --0.4 0.4 0.4 0.4 0.4 0.8 0.4 31 0.4 --0.4 0.4 --0.4 --0.4 --0.4 2.2 -------------------------------------------------------------------------------MEAN 0.6 0.6 0.5 0.4 0.5 0.7 0.4 0.4 0.4 0.4 0.5 0.8 MAX 1.5 2.1 1.2 0.4 1.8 2.6 0.4 0.4 0.4 0.4 2.4 1.9 MIN 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.51 MAX 2.58 MIN 0.38 FCDMC Annual Surface Water Report, Water Year 2020 Page 383 Hartman Wash, ID #51207 Site Data LOCATION About 3 miles west of Vulture Mine Road on US 60 DRAINAGE AREA 5.4 mi2 STREAM TYPE Natural Stream JURISDICTION Wickenburg, Arizona WATERSHED Lower Hassayampa SECTION/TOWNSHIP/RANGE S15 T7N R6W LATITUDE N 33° 57' 46.0" | +33.96277 LONGITUDE W 112° 49' 40.7" | ‐112.82798 STREAMGAGE INSTALLATION DATE 07/06/1994 ‐ WY 1994 AVAILABLE PERIOD OF RECOD 07/06/1994 ‐ Current LENGTH OF AVAILABLE POR DATA 26.24 Years | 9,584 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.05 feet Gage Height STAFF GAGES 1 CREST STAGE GAGES 3 ZERO GAGE HEIGHT ELEVATION 2,454.40 feet NAVD88 POINT OF ZERO FLOW ‐0.1 feet Gage Height EXTREME FOR PERIOD OF RECORD 3,400 cfs | 7.94 feet | 07/30/2005 FCDMC Annual Surface Water Report, Water Year 2020 Page 384 Watershed Map Hartman Wash - water year peaks 4,000 Discharge (cfs) 3,500 3,000 2,500 2,000 1,500 1,000 500 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 385 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Discharge (cfs) 11/29/2019 0.66 69 Hydrograph of peak WY 2020 flow event, 11/29/2019 Flood Flow Frequency Flood Flow Frequency N=47, HEC‐WRC computation (based on 47 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 263 977 1,710 2,560 3,780 4,750 NOTE: These results are based on limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 386 Hartman Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 --14 15 16 17 18 19 --20 --21 --22 --23 --24 --25 26 27 28 29 2 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 2 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 69 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 3 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 2 MEAN 0 MAX 69 MIN 0 AC_FT 3 FCDMC Annual Surface Water Report, Water Year 2020 Page 387 Hassayampa River at Wagoner, ID #54307 Site Data LOCATION Located on the Wagoner Road bridge crossing of the Hassayampa River DRAINAGE AREA 78 mi2 STREAM TYPE Natural Stream JURISDICTION Yavapai County, Arizona WATERSHED Upper Hassayampa SECTION/TOWNSHIP/RANGE S09 T11N R3W LATITUDE N 34° 18' 36.5" | +34.31016 LONGITUDE W 112° 34' 07.6" | ‐112.56879 STREAMGAGE INSTALLATION DATE 12/19/1983 ‐ WY 1984 AVAILABLE PERIOD OF RECORD (POR) 11/27/1991 ‐ Current LENGTH OF AVAILABLE POR DATA 28.85 Years | 10,536 Days DATA GAPS IN POR 09/25/2007 ‐ 05/28/2008 STAGE GAGE ELEVATION 2.18 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 3,739.72 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 5,068 cfs | 5.00 feet | 01/08/1993 FCDMC Annual Surface Water Report, Water Year 2020 Page 388 Watershed Map Hassayampa River at Wagoner Bridge - water year peaks 6,000 Discharge (cfs) 5,000 4,000 3,000 2,000 1,000 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 389 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Discharge (cfs) 03/13/2020 3.07 440 Hydrograph of peak WY 2020 flow event, 03/13/2020 Flood Flow Frequency Flood Flow Frequency N=29, HEC‐WRC computation (based on 29 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 415 1,730 3,390 5,680 9,760 13,700 NOTE: These results are based on limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 390 Hassayampa River at Wagoner, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 13 14 15 16 17 18 19 --20 21 22 23 24 --25 --26 --27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 13 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 440 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 26 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 13 MEAN 0 MAX 440 MIN 0 AC_FT 26 FCDMC Annual Surface Water Report, Water Year 2020 Page 391 Hassayampa River at Box Canyon, ID #53507 Site Data LOCATION Northeast of Wickenburg DRAINAGE AREA 417 mi2 STREAM TYPE Natural Stream JURISDICTION Yavapai County, Arizona WATERSHED Lower Hassayampa SECTION/TOWNSHIP/RANGE S07 T8N R4W LATITUDE N 34° 02' 42.3" | +34.04508 LONGITUDE W 112° 42' 36.5" | ‐112.71013 STREAMGAGE INSTALLATION DATE 11/17/1983 ‐ WY 1984 AVAILABLE PERIOD OF RECORD (POR) 10/16/1991 ‐ Current LENGTH OF AVAILABLE POR DATA 28.96 Years | 10,578 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 3.30 feet Gage Height STAFF GAGES 1 CREST STAGE GAGES 2 ZERO GAGE HEIGHT ELEVATION 2,238.01 feet NAVD88 POINT OF ZERO FLOW 2.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 26,000 cfs | 18.90 feet | 01/21/2010 EXTREME OUTSIDE PERIOD OF RECORD 58,000 cfs | 34.6 feet | 09/05/1970 FCDMC Annual Surface Water Report, Water Year 2020 Page 392 Watershed Map Hassayampa River at Box Canyon - water year peaks 70,000 Discharge (cfs) 60,000 50,000 40,000 30,000 20,000 10,000 0 1925 1950 1975 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 393 2000 2025 WY2020 Events Date of Peak 11/29/2019 03/12/2020 03/13/2020 03/14/2020 03/19/2020 Peak Gage Height (feet) 6.53 4.31 10.08 4.85 6.51 Peak Discharge (cfs) 1,914 254 7,641 559 1,901 Hydrograph of peak WY 2020 flow event, 03/13/2020 Flood Flow Frequency Flood Flow Frequency N=70, HEC‐WRC computation (based on 70 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 3,230 9,990 17,300 26,500 42,100 56,500 NOTE: These results are based on available data. FCDMC Annual Surface Water Report, Water Year 2020 Page 394 Hassayampa River at Box Canyon, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 17 17 2 17 17 1 3 17 17 2 4 17 17 2 5 19 17 1 6 17 17 2 7 19 19 1 8 --17 17 1 9 17 19 1 10 17 17 1 11 17 17 1 12 --370 17 2 13 --1204 17 1 14 221 17 4 15 65 17 3 16 33 19 1 17 17 17 2 18 387 17 1 19 9 380 19 2 20 17 18 19 1 21 17 36 17 22 17 53 20 2 23 17 39 20 1 24 17 22 20 2 25 17 19 22 26 17 17 21 27 17 19 20 1 28 19 17 22 1 29 350 17 17 4 30 ----17 31 ----17 -----------------------------------------------------------------------------------TOTAL 0 350 0 0 182 3162 518 0 0 0 39 0 MEAN 0 12 0 0 6 102 17 0 0 0 1 0 MAX 0 1914 0 0 23 7641 37 0 0 0 13 0 MIN 0 0 0 0 0 17 0 0 0 0 0 0 AC_FT 0 694 0 0 361 6272 1027 0 0 0 78 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 4251 MEAN 12 MAX 7641 MIN 0 AC_FT 8431 FCDMC Annual Surface Water Report, Water Year 2020 Page 395 Hassayampa River at US60, ID #45707 Site Data LOCATION US 60 crossing of the Hassayampa River DRAINAGE AREA 711 mi2 STREAM TYPE Natural Stream JURISDICTION Wickenburg, Arizona WATERSHED Lower Hassayampa SECTION/TOWNSHIP/RANGE S12 T7N R5W LATITUDE N 33° 58' 13.2" | +33.97032 LONGITUDE W 112° 43' 37.3" | ‐112.72704 STREAMGAGE INSTALLATION DATE 03/14/1994 ‐ WY 1994 AVAILABLE PERIOD OF RECORD (POR) 03/14/1994 ‐ 10/01/2010 LENGTH OF AVAILABLE POR DATA 26.55 Years | 9,698 Days DATA GAPS IN POR 06/26/2009 ‐ 04/13/2010 STAGE GAGE ELEVATION 0.60 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 2 ZERO GAGE HEIGHT ELEVATION 2,034.85 feet NAVD88 POINT OF ZERO FLOW 0.5 feet Gage Height EXTREME FOR PERIOD OF RECORD 16,089 cfs | 4.32 feet | 02/12/2005 EXTREME OUTSIDE PERIOD OF RECORD 52,000 cfs | 10.3 feet | 09/05/1970 FCDMC Annual Surface Water Report, Water Year 2020 Page 396 Watershed Map Hassayampa River at US60 - water year peaks Discharge (cfs) 25,000 20,000 15,000 10,000 5,000 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 397 2015 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/21/2019 11/28/2019 11/29/2019 03/12/2020 03/13/2020 03/13/2020 03/14/2020 03/14/2020 03/19/2020 03/19/2020 03/19/2020 Peak Gage Height (feet) 0.82 1.17 0.97 2.87 1.62 2.84 2.11 2.16 1.94 2.14 2.21 2.56 Peak Discharge (cfs) 70 404 175 5,590 1,212 5,432 2,431 2,576 1,967 2,517 2,724 4,075 Hydrograph of peak WY 2020 flow event, 11/29/2019 Flood Flow Frequency Flood Flow Frequency N=27, HEC‐WRC computation (based on 27 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 3,030 10,400 18,000 27,100 40,900 52,400 NOTE: These results are based on very limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 398 Hassayampa River at US60, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 368 2 391 3 415 4 333 5 1 306 6 1 363 7 293 8 297 9 327 10 299 11 271 12 221 251 13 --1626 287 14 1217 264 15 936 239 16 751 259 17 676 259 18 512 226 19 1668 213 20 4 809 220 21 81 730 177 22 2 563 103 23 541 24 570 25 677 26 502 27 355 28 36 324 29 1217 273 30 --268 31 ----273 -----------------------------------------------------------------------------------TOTAL 0 1340 0 0 0 13492 6163 0 0 0 0 0 MEAN 0 45 0 0 0 435 205 0 0 0 0 0 MAX 0 5590 0 0 0 6530 508 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 2659 0 0 0 26761 12224 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 20996 MEAN 57 MAX 6530 MIN 0 AC_FT 41644 FCDMC Annual Surface Water Report, Water Year 2020 Page 399 Hassayampa River near Morristown, ID #45507 Site Data LOCATION Located about 6 miles south of Wickenburg DRAINAGE AREA 796 mi2 STREAM TYPE Natural Stream JURISDICTION Maricopa County, Arizona WATERSHED Lower Hassayampa SECTION/TOWNSHIP/RANGE S03 T6N R4W LATITUDE N 33° 53' 05.3" | +33.88481 LONGITUDE W 112° 39' 42.3" | ‐112.66174 STREAMGAGE INSTALLATION DATE 05/07/1996 ‐ WY 1996 AVAILABLE PERIOD OF RECORD (POR) 05/07/1996 ‐ Current LENGTH OF AVAILABLE POR DATA 24.40 Years | 8,913 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 7.25 feet Gage Height STAFF GAGES 2 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,832.62 feet NAVD88 POINT OF ZERO FLOW 8.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 16,900 cfs | 14.21 feet | 01/22/2010 EXTREME OUTSIDE PERIOD OF RECORD 47,500 cfs | 09/05/1970 FCDMC Annual Surface Water Report, Water Year 2020 Page 400 Watershed Map Hassayampa River near Morristown - water year peaks 18,000 Discharge (cfs) 16,000 14,000 12,000 10,000 8,000 6,000 4,000 2,000 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 401 2015 2020 2025 WY2020 Events Date of Peak 11/29/2019 11/29/2019 03/13/2020 03/19/2020 Peak Gage Height (feet) 9.88 9.47 11.13 9.71 Peak Discharge (cfs) 2,110 1,565 4,664 1,872 Hydrograph of peak WY 2020 flow event, 03/13/2020 Flood Flow Frequency Flood Flow Frequency N=67, HEC‐WRC computation (based on 67 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 2,950 9,190 14,900 21,000 29,400 35,700 NOTE: These results are based on available data. FCDMC Annual Surface Water Report, Water Year 2020 Page 402 Hassayampa River near Morristown, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 23 2 3 4 5 6 7 8 9 10 11 9 12 104 13 1295 14 768 15 235 16 91 17 33 18 117 19 1012 20 521 21 --228 22 139 23 104 24 88 --25 79 26 73 27 72 28 66 29 685 56 30 216 --44 2 31 ---------------------------------------------------------------------------------------TOTAL 0 900 23 0 0 5135 0 0 0 0 2 0 MEAN 0 30 1 0 0 166 0 0 0 0 0 0 MAX 0 2110 47 0 0 4664 0 0 0 0 107 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 1786 47 0 0 10185 0 0 0 0 3 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 6060 MEAN 17 MAX 4664 MIN 0 AC_FT 12020 FCDMC Annual Surface Water Report, Water Year 2020 Page 403 Hassayampa River at I‐10, ID #48007 Site Data LOCATION Located on the eastbound I‐10 bridge DRAINAGE AREA 1,450 mi2 STREAM TYPE Natural Stream JURISDICTION Maricopa County, Arizona WATERSHED Lower Hassayampa SECTION/TOWNSHIP/RANGE S03 T1N R5W LATITUDE N 33° 27' 28.2" | +33.45782 LONGITUDE W 112° 45' 40.7" | ‐112.76139 STREAMGAGE INSTALLATION DATE 11/09/1994 ‐ WY 1995 AVAILABLE PERIOD OF RECORD (POR) 11/09/1994 ‐ Current LENGTH OF AVAILABLE POR DATA 25.89 Years | 9,458 Days DATA GAPS IN POR 02/15/2011 ‐ 01/30/2012 STAGE GAGE ELEVATION 2.40 feet Gage Height STAFF GAGES 2 CREST STAGE GAGES 3 ZERO GAGE HEIGHT ELEVATION 1,018.72 feet NAVD88 POINT OF ZERO FLOW 1.9 feet Gage Height EXTREME FOR PERIOD OF RECORD 27,000 cfs | 7.05 feet | 10/27/2000 FCDMC Annual Surface Water Report, Water Year 2020 Page 404 Watershed Map Hassayampa River at I-10 - water year peaks 30,000 Discharge (cfs) 25,000 20,000 15,000 10,000 5,000 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 405 2015 2020 2025 WY2020 Events Date of Peak 11/29/2019 11/29/2019 03/13/2020 03/19/2020 Peak Gage Height (feet) 2.00 2.64 2.98 2.74 Peak Discharge (cfs) 327 767 987 828 Hydrograph of peak WY 2020 flow event, 03/13/2020 Flood Flow Frequency Flood Flow Frequency N=26, HEC‐WRC computation (based on 26 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 399 2,240 5,410 11,100 24,400 41,200 NOTE(1): These results are based on very limited data. NOTE(2): FEMA 100‐year discharge is 75,164 cfs FCDMC Annual Surface Water Report, Water Year 2020 Page 406 Hassayampa River at I-10, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 21 8 9 10 11 12 13 83 14 15 16 17 18 19 125 20 21 22 23 24 25 26 27 28 29 30 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 30 0 21 0 208 0 0 0 0 0 0 MEAN 0 1 0 1 0 7 0 0 0 0 0 0 MAX 0 767 0 317 0 987 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 59 0 42 0 412 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 258 MEAN 1 MAX 987 MIN 0 AC_FT 512 FCDMC Annual Surface Water Report, Water Year 2020 Page 407 Hesperus Dam, ID #79007 Site Data LOCATION East of Golden Eagle Boulevard off of Richwood Avenue DRAINAGE AREA 2.91 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Fountain Hills, Arizona WATERSHED Lower Verde SECTION/TOWNSHIP/RANGE S04 T3N R6E LATITUDE N 33° 38' 11.8" | +33.63661 LONGITUDE W 111° 44' 47.6" | ‐111.74656 STREAMGAGE INSTALLATION DATE 12/18/1996 ‐ WY 1997 AVAILABLE PERIOD OF RECORD (POR) 12/18/1996 ‐ Current LENGTH OF AVAILABLE POR DATA 23.79 Years | 8,688 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 1.03 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,855.61 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY CREST ELEVATION 35.2 feet Gage Height TOP OF DAM ELEVATION 41.1 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 408 Watershed Map Hesperus Dam - water year peaks 7.0 Volume (acre-feet) 6.0 5.0 4.0 3.0 2.0 1.0 0.0 1995 2000 2005 FCDMC Annual Surface Water Report, Water Year 2020 Page 409 2010 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Volume (ac‐ft) None Hydrograph of peak WY 2020 impoundment event, No impoundments recorded in Water Year 2020. FCDMC Annual Surface Water Report, Water Year 2020 Page 410 Percent Spillway Capacity Hesperus Dam, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 411 Hesperus Dam, volume data Volume, in acre feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 0 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 412 Hesperus Dam, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 2 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 3 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 4 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 5 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 6 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 7 0.8 0.8 0.8 0.8 --0.8 0.8 0.8 0.8 0.8 0.8 0.8 8 0.8 0.8 0.8 0.8 --0.8 0.8 0.8 0.8 0.8 0.8 0.8 9 0.8 0.8 0.8 0.8 --0.8 0.8 0.8 0.8 0.8 0.8 0.8 10 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 11 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 12 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 13 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 14 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 15 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 16 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 17 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 18 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 19 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 20 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 21 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 22 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 23 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 24 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 25 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 26 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 27 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 28 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 29 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 30 0.8 0.8 0.8 0.8 --0.8 0.8 0.8 0.8 0.8 0.8 0.8 31 0.8 --0.8 0.8 --0.8 --0.8 --0.8 0.8 -------------------------------------------------------------------------------MEAN 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 MAX 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 MIN 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.79 MAX 0.79 MIN 0.79 FCDMC Annual Surface Water Report, Water Year 2020 Page 413 Indian Bend Wash at Sweetwater Avenue – ID #58307 Site Data LOCATION Near 36th Street and Sweetwater Ave DRAINAGE AREA 11.7 mi2 STREAM TYPE Channelized Stream JURISDICTION Phoenix, Arizona WATERSHED Middle Indian Bend SECTION/TOWNSHIP/RANGE S13 T3N R3E LATITUDE N 33° 36' 13.3" | +33.60369 LONGITUDE W 112° 00' 16.0" | ‐112.00445 STREAMGAGE INSTALLATION DATE 12/27/1990 ‐ WY 1991 AVAILABLE PERIOD OF RECORD (POR) 03/27/1992 ‐ Current LENGTH OF AVAILABLE POR DATA DATA 28.51 Years | 10,415 Days DATA GAPS IN POR 04/27/1997 ‐ 11/22/1998 STAGE GAGE ELEVATION 0.00 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,387.63 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 2,093 cfs | 4.90 feet | 08/02/2005 FCDMC Annual Surface Water Report, Water Year 2020 Page 414 Watershed Map Indian Bend Wash at Sweetwater Avenue - water year peaks Discharge (cfs) 2,500 2,000 1,500 1,000 500 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 415 2015 2020 2025 WY2020 Events Date of Peak 11/29/2019 11/21/2019 11/29/2019 12/07/2019 12/09/2019 12/24/2019 12/25/2019 12/27/2019 02/11/2019 02/22/2019 03/11/2020 03/12/2020 03/12/2020 03/13/2020 03/13/2020 03/18/2020 07/24/2020 08/30/2020 Peak Gage Height (feet) 1.31 0.43 1.70 0.58 1.36 0.43 0.72 0.77 0.92 1.46 1.22 1.07 1.95 1.85 2.00 0.92 0.83 0.34 Peak Discharge (cfs) 181 50 247 69 190 50 88 95 117 207 166 141 290 272 298 117 103 35 Hydrograph of peak WY 2020 flow event, 03/13/2020 Flood Flow Frequency (NOTE: Results for the HEC‐WRC analysis are based on very limited data.) Flood Flow Frequency N=29, HEC‐WRC computation (based on 29 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 214 436 859 1,210 1,600 2,640 3,500 6,000 FEMA FIS, Flood Flow Frequency 2,000 FCDMC Annual Surface Water Report, Water Year 2020 Page 416 Indian Bend Wash at Sweetwater Avenue, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 1 --8 9 --9 27 --10 4 1 11 29 58 12 1 75 13 97 14 5 15 16 17 18 20 19 5 20 66 21 7 22 55 23 24 27 15 25 19 2 26 27 8 28 29 44 30 --2 31 ---------------------------------------------------------------------------------------TOTAL 0 119 91 0 86 261 0 0 0 17 2 0 MEAN 0 4 3 0 3 8 0 0 0 1 0 0 MAX 0 247 190 0 207 298 0 0 0 103 35 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 235 181 0 172 517 0 0 0 35 4 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 577 MEAN 2 MAX 298 MIN 0 AC_FT 1144 FCDMC Annual Surface Water Report, Water Year 2020 Page 417 Indian Bend Wash at Shea Boulevard, ID #59507 Site Data LOCATION Near 52nd Street and Shea Boulevard DRAINAGE AREA 24.6 mi2 STREAM TYPE Channelized Natural Stream JURISDICTION Phoenix, Arizona WATERSHED Lower Indian Bend SECTION/TOWNSHIP/RANGE S29 T3N R4E LATITUDE N 33° 34' 53.2" | +33.58143 LONGITUDE W 111° 58' 06.3" | ‐111.96841 STREAMGAGE INSTALLATION DATE 06/09/1998 ‐ WY 1998 AVAILABLE PERIOD OF RECORD (POR) 06/09/1998 ‐ Current LENGTH OF AVAILABLE POR DATA DATA 22.31 Years | 8,150 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.35 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,344.26 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 5,616 cfs | 4.68 feet | 08/02/2005 FCDMC Annual Surface Water Report, Water Year 2020 Page 418 Watershed Map Indian Bend Wash at Shea Boulevard - water year peaks 6,000 Discharge (cfs) 5,000 4,000 3,000 2,000 1,000 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 419 2015 2020 2025 WY2020 Events Date of Peak 11/19/2019 11/20/2019 11/29/2019 12/08/2019 12/09/2019 12/24/2019 02/11/2020 02/22/2020 03/11/2020 03/12/2020 03/13/2020 03/13/2020 03/18/2020 07/24/2020 08/20/2020 Peak Gage Height (feet) 0.72 1.72 1.47 0.98 1.35 1.13 0.88 1.58 1.39 1.62 1.64 1.72 1.42 1.24 1.39 Peak Discharge (cfs) 18 468 280 48 210 96 34 359 232 392 407 468 249 146 232 Hydrograph of peak WY 2020 flow event, 03/13/2020 Flood Flow Frequency Flood Flow Frequency N=32, HEC‐WRC computation (based on 32 years of data, USGS and FCDMC data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 1,150 2,330 3,420 4,730 6,880 8,870 NOTE: These results are based on limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 420 Inidan Bend Wash at Shea Boulevard, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 1 6 --1 1 7 1 --8 27 --9 60 --10 94 4 11 13 98 --12 10 134 --13 184 --14 49 15 6 16 17 18 33 19 3 45 20 174 2 24 21 50 15 22 25 141 23 2 49 24 22 9 22 25 80 4 3 26 3 27 28 29 177 30 2 --31 ---------------------------------------------------------------------------------------TOTAL 0 432 286 13 213 556 0 0 1 27 40 0 MEAN 0 14 9 0 7 18 0 0 0 1 1 0 MAX 0 468 210 12 359 468 0 0 2 146 232 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 857 568 25 423 1103 0 0 1 53 79 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 1568 MEAN 4 MAX 468 MIN 0 AC_FT 3109 FCDMC Annual Surface Water Report, Water Year 2020 Page 421 Indian Bend Wash near Indian Bend Road – ID #56307 Site Data LOCATION About 1/4 mile south of Indian Bend Road DRAINAGE AREA 88 mi2 STREAM TYPE Channelized Natural Stream JURISDICTION Scottsdale, Arizona WATERSHED Lower Indian Bend SECTION/TOWNSHIP/RANGE S11 T2N R4E LATITUDE N 33° 32' 04.0" | +33.53444 LONGITUDE W 111° 54' 51.1" | ‐111.91422 STREAMGAGE INSTALLATION DATE 09/28/1983 ‐ WY 1983 AVAILABLE PERIOD OF RECORD (POR) 03/27/1992 ‐ Current LENGTH OF AVAILABLE POR DATA 28.51 Years | 10,415 Days DATA GAPS IN POR 09/28/1983 ‐ 03/27/1992 | 07/07/1999 ‐ 01/25/2000 STAGE GAGE ELEVATION ‐0.15 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,267.55 feet Gage NAVD88 POINT OF ZERO FLOW ‐0.2 feet Gage Height EXTREME FOR PERIOD OF RECORD 9,324 cfs | 5.85 feet | 07/24/1992 EXTREME OUTSIDE PERIOD OF RECORD 21,000 cfs | 06/22/1972 FCDMC Annual Surface Water Report, Water Year 2020 Page 422 Watershed Map Discharge (cfs) Indian Bend Wash near Indian Bend Road - water year peaks 10,000 9,000 8,000 7,000 6,000 5,000 4,000 3,000 2,000 1,000 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 423 2015 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/29/2019 12/25/2019 02/11/2020 02/22/2020 03/11/2020 03/13/2020 03/13/2020 03/19/2020 Peak Gage Height (feet) 1.54 1.84 1.27 1.42 2.41 1.46 3.01 2.66 1.09 Peak Discharge (cfs) 28 49 18 22 156 26 313 219 15 Hydrograph of peak WY 2020 flow event, 03/13/2020 Flood Flow Frequency Flood Flow Frequency N=29, HEC‐WRC computation (based on 29 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 844 2,290 4,040 6,590 11,700 17,500 NOTE: These results are based on limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 424 Indian Bend Wash near Indian Bend Road, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 7 6 5 2 6 5 5 3 6 6 5 4 6 6 4 5 6 6 2 6 6 6 7 2 6 --8 5 --9 1 5 --10 5 5 1 11 5 4 14 6 12 6 4 10 19 13 6 4 7 115 14 5 1 7 22 15 5 6 7 16 5 6 6 17 4 5 5 18 5 5 19 5 10 20 4 5 7 21 16 5 5 22 9 38 5 23 7 3 15 5 24 6 5 7 4 25 6 5 5 6 4 26 6 10 4 6 2 27 6 7 4 5 28 6 7 2 6 29 20 7 4 5 30 12 6 2 --31 --5 -------------------------------------------------------------------------------------TOTAL 0 97 130 96 163 248 0 0 0 0 0 0 MEAN 0 3 4 3 6 8 0 0 0 0 0 0 MAX 0 49 18 6 156 313 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 193 258 190 324 492 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 735 MEAN 2 MAX 313 MIN 0 AC_FT 1458 FCDMC Annual Surface Water Report, Water Year 2020 Page 425 Indian Bend Wash at McDonald Drive – ID #57207 Site Data LOCATION On McDonald Drive west of Hayden Road DRAINAGE AREA 88 mi2 STREAM TYPE Engineered Natural Stream JURISDICTION Scottsdale, Arizona WATERSHED Lower Indian Bend SECTION/TOWNSHIP/RANGE S11 T2N R4E LATITUDE N 33° 31' 26.7" | +33.52407 LONGITUDE W 111° 54' 35.8" | ‐111.90994 STREAMGAGE INSTALLATION DATE 11/24/1997 ‐ WY 1998 AVAILABLE PERIOD OF RECORD (POR) 11/24/1997 ‐ Current LENGTH OF AVAILABLE POR DATA DATA 22.85 Years | 8,347 Days DATA GAPS IN POR None STAGE GAGE ELEVATION ‐1.90 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,262.37 feet NAVD88 POINT OF ZERO FLOW ‐1.9 feet Gage Height EXTREME FOR PERIOD OF RECORD 3,482 cfs | 4.03 feet | 09/08/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 426 Watershed Map Indian Bend Wash at McDonald Drive - water year peaks 4,000 Discharge (cfs) 3,500 3,000 2,500 2,000 1,500 1,000 500 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 427 2015 2020 2025 WY2020 Events Date of Peak 11/21/2019 11/29/2019 12/25/2019 02/10/2020 02/11/2020 02/22/2020 03/11/2020 03/12/2020 03/13/2020 03/19/2020 Peak Gage Height (feet) 0.61 0.61 0.31 ‐0.14 0.34 0.81 0.46 0.56 1.26 0.19 Peak Discharge (cfs) 475 475 305 114 320 594 388 445 907 244 Hydrograph of peak WY 2020 flow event, 03/13/2020 Flood Flow Frequency Flood Flow Frequency N=23, HEC‐WRC computation (based on 23 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 959 1,970 2,910 4,060 5,940 7,710 NOTE: These results are based on limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 428 Indian Bend Wash at McDonald Drive, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 46 2 20 8 3 18 2 14 4 17 12 5 5 2 6 7 --8 --9 --10 31 1 11 189 116 12 81 371 13 27 666 14 31 280 15 39 16 19 17 17 18 16 19 130 20 8 25 21 275 16 22 97 306 15 23 50 192 15 24 21 24 14 25 5 66 12 26 130 2 27 1 41 28 12 31 29 244 28 30 144 17 --31 ---------------------------------------------------------------------------------------TOTAL 0 855 418 2 866 1790 0 0 0 0 0 0 MEAN 0 28 13 0 30 58 0 0 0 0 0 0 MAX 0 475 305 15 594 907 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 1695 829 4 1717 3550 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 3930 MEAN 11 MAX 907 MIN 0 AC_FT 7796 FCDMC Annual Surface Water Report, Water Year 2020 Page 429 Indian Bend Wash at Indian School Road – ID #56507 Site Data LOCATION On Indian School Road west of Hayden Road DRAINAGE AREA 90 mi2 STREAM TYPE Improved Natural Stream JURISDICTION Scottsdale, Arizona WATERSHED Lower Indian Bend SECTION/TOWNSHIP/RANGE S23 T2N R4E LATITUDE N 33° 29' 42.2" | +33.49505 LONGITUDE W 111° 54' 40.5" | ‐111.91126 STREAMGAGE INSTALLATION DATE 11/25/1997 ‐ WY 1998 AVAILABLE PERIOD OF RECORD (POR) 11/25/1997 ‐ Current LENGTH OF AVAILABLE POR DATA 22.85 Years | 8,346 Days DATA GAPS IN POR 11/30/2009 ‐ 02/16/2010 STAGE GAGE ELEVATION 0.72 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,235.28 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 3,887 cfs | 5.50 feet | 09/08/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 430 Watershed Map Indian Bend Wash at Indian School Road - water year peaks 4,500 4,000 3,500 3,000 2,500 2,000 1,500 1,000 500 0 1995 2000 2005 FCDMC Annual Surface Water Report, Water Year 2020 Page 431 2010 2015 2020 2025 WY2020 Events Date of Peak 11/21/2019 11/29/2019 11/29/2019 12/26/2019 02/12/2020 02/22/2020 03/11/2020 03/12/2020 03/13/2020 03/14/2020 03/19/2020 Peak Gage Height (feet) 1.69 2.11 1.99 1.34 1.36 1.86 1.11 1.21 2.34 2.36 1.29 Peak Discharge (cfs) 346 564 495 200 207 429 120 153 700 713 181 Hydrograph of peak WY 2020 flow event, 03/14/2020 Flood Flow Frequency Flood Flow Frequency N=23, HEC‐WRC computation (based on 23 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 834 1,900 2,870 3,980 5,690 7,180 NOTE: These results are based on limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 432 Indian Bend Wash at Indian School Road, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 11 67 9 12 83 98 13 467 14 306 15 30 16 17 18 4 19 92 20 34 21 181 22 40 174 23 162 24 25 26 64 27 28 29 294 30 174 --31 ---------------------------------------------------------------------------------------TOTAL 0 689 65 0 486 1040 0 0 0 0 0 0 MEAN 0 23 2 0 17 34 0 0 0 0 0 0 MAX 0 564 200 0 429 713 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 1367 128 0 964 2063 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 2280 MEAN 6 MAX 713 MIN 0 AC_FT 4522 FCDMC Annual Surface Water Report, Water Year 2020 Page 433 Indian Bend Wash near McKellips Road, ID #55707 Site Data LOCATION About 1/3 mile south of McKellips Road DRAINAGE AREA 101 mi2 STREAM TYPE Channelized Natural Ephemeral Stream JURISDICTION Tempe, Arizona WATERSHED Lower Indian Bend SECTION/TOWNSHIP/RANGE S11 T1N R4E LATITUDE N 33° 26' 57.2" | +33.44923 LONGITUDE W 111° 54' 53.3" | ‐111.91482 STREAMGAGE INSTALLATION DATE 05/21/1985 ‐ WY 1985 AVAILABLE PERIOD OF RECORD (POR) 11/10/1987 ‐ Current LENGTH OF AVAILABLE POR DATA 32.89 Years | 12,014 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.00 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,173.84 feet Gage NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height EXTREME FOR PERIOD OF RECORD 5,841 cfs | 6.90 feet | 09/08/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 434 Watershed Map Indian Bend Wash near McKellips Road - water year peaks 7,000 Discharge (cfs) 6,000 5,000 4,000 3,000 2,000 1,000 0 1985 1990 1995 2000 2005 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 435 2010 2015 2020 2025 WY2020 Events Date of Peak 11/21/2019 11/29/2019 12/27/2019 02/11/2020 02/23/2020 03/11/2020 03/12/2020 03/13/2020 03/13/2020 03/20/2020 07/24/2020 Peak Gage Height (feet) 0.96 0.77 0.85 1.22 1.99 1.20 1.23 2.28 2.55 0.73 0.80 Peak Discharge (cfs) 112 69 86 187 490 180 190 638 789 61 75 Hydrograph of peak WY 2020 flow event, 03/13/2020 Flood Flow Frequency Flood Flow Frequency N=33, HEC‐WRC computation (based on 33 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 1,110 2,860 4,640 6,860 10,600 14,100 NOTE: These results are based on limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 436 Indian Bend Wash near McKellips Road, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 23 --1 16 10 2 21 1 1 15 9 3 23 1 5 13 9 4 23 1 4 13 15 5 24 1 5 25 32 6 18 1 5 32 31 7 18 1 --31 29 8 18 1 --30 26 9 17 1 --31 75 10 --1 5 30 69 11 --1 39 99 72 12 --1 132 160 63 13 --1 50 533 52 14 --1 35 335 51 15 --1 16 87 79 16 --1 15 32 70 17 --1 14 10 78 18 --1 14 14 76 19 --1 14 28 73 20 --15 1 14 48 41 21 --66 1 14 29 5 22 --57 1 142 12 3 23 9 18 1 285 15 14 24 9 9 1 91 14 17 9 25 10 8 5 49 12 17 23 26 10 7 25 38 11 17 19 27 10 8 36 22 11 16 4 28 10 9 26 18 10 14 29 --6 19 17 10 30 2 37 --10 31 ----8 --9 -----------------------------------------------------------------------------------TOTAL 478 204 174 0 1058 1727 1062 0 0 62 0 0 MEAN 15 7 6 0 36 56 35 0 0 2 0 0 MAX 27 112 86 0 490 789 162 0 0 75 0 0 MIN 0 0 0 0 0 8 0 0 0 0 0 0 AC_FT 947 404 346 0 2098 3425 2106 0 0 122 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 4764 MEAN 13 MAX 789 MIN 0 AC_FT 9448 FCDMC Annual Surface Water Report, Water Year 2020 Page 437 Indian Bend Wash Interceptor Channel – ID #56807 Site Data LOCATION Between Pima and Hayden Roads north of the Arizona Canal DRAINAGE AREA 35 mi2 STREAM TYPE Engineered Channel JURISDICTION Scottsdale, Arizona WATERSHED Lower Indian Bend SECTION/TOWNSHIP/RANGE S12 T2N R4E LATITUDE N 33° 31' 59.4" | +33.53317 LONGITUDE W 111° 53' 52.4" | ‐111.89789 STREAMGAGE INSTALLATION DATE 04/21/1994 ‐ WY 1994 AVAILABLE PERIOD OF RECORD (POR) 04/21/1994 ‐ Current LENGTH OF AVAILABLE POR DATA 26.45 Years | 9,660 Days DATA GAPS IN POR 06/16/1999 ‐ 01/11/2000 STAGE GAGE ELEVATION 0.00 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,271.46 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 1,542 cfs | 5.78 feet | 08/11/2018 FCDMC Annual Surface Water Report, Water Year 2020 Page 438 Watershed Map Indian Bend Wash Interceptor Channel - water year peaks 1,800 Discharge (cfs) 1,600 1,400 1,200 1,000 800 600 400 200 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 439 2015 2020 2025 WY2020 Events Date of Peak 02/11/2020 02/22/2020 03/13/2020 Peak Gage Height (feet) 0.23 0.56 0.86 Peak Discharge (cfs) 3 10 18 Hydrograph of peak WY 2020 flow event, 03/13/2020 Flood Flow Frequency Flood Flow Frequency N=27, HEC‐WRC computation (based on 27 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 55 299 697 1,380 2,890 4,690 NOTE: These results are based on limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 440 Indian Bend Wash Interceptor Channel, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 11 1 12 13 4 14 15 16 17 18 19 20 21 22 3 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 3 4 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 10 18 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 7 8 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 8 MEAN 0 MAX 18 MIN 0 AC_FT 15 FCDMC Annual Surface Water Report, Water Year 2020 Page 441 Jackrabbit Wash, ID #45007 Site Data LOCATION Located near the intersection of Vulture Mine and Wickenburg Roads DRAINAGE AREA 120 mi2 STREAM TYPE Natural Stream JURISDICTION Maricopa County, Arizona WATERSHED Lower Hassayampa SECTION/TOWNSHIP/RANGE S04 T4N R6W LATITUDE N 33° 42' 55.6" | +33.71543 LONGITUDE W 112° 52' 54.4" | ‐112.88179 STREAMGAGE INSTALLATION DATE 10/31/2000 ‐ WY 2001 AVAILABLE PERIOD OF RECORD (POR) 10/31/2000 ‐ Current LENGTH OF AVAILABLE POR DATA 19.92 Years | 7,275 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 2.30 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,700.28 feet NAVD88 POINT OF ZERO FLOW 0.7 feet Gage Height EXTREME FOR PERIOD OF RECORD 7,974 cfs | 6.18 feet | 09/09/2014 EXTREME OUTSIDE PERIOD OF RECORD 32,400 cfs | 9.90 feet | 10/27/2000 FCDMC Annual Surface Water Report, Water Year 2020 Page 442 Watershed Map Jackrabbit Wash - water year peaks 35,000 Discharge (cfs) 30,000 25,000 20,000 15,000 10,000 5,000 0 2000 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 443 2020 2025 WY2020 Events Date of Peak 11/29/2019 03/13/2020 03/13/2020 03/13/2020 08/16/2020 08/30/2020 Peak Gage Height (feet) 3.14 3.51 2.41 2.41 2.33 3.10 Peak Discharge (cfs) 822 1,222 337 337 288 784 Hydrograph of peak WY 2020 flow event, 03/13/2020 Flood Flow Frequency Flood Flow Frequency N=47, HEC‐WRC computation (based on 47 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 1,120 4,620 8,620 13,600 21,500 28,300 NOTE: These results are based on limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 444 Jackrabbit Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 --5 --6 ----7 ----8 ----9 --10 ------11 12 13 157 14 15 16 9 17 18 19 20 21 22 23 24 --25 --26 27 28 29 63 30 --41 31 ---------------------------------------------------------------------------------------TOTAL 0 63 0 0 0 157 0 0 0 0 50 0 MEAN 0 2 0 0 0 5 0 0 0 0 2 0 MAX 0 822 0 0 0 1222 0 0 0 0 784 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 125 0 0 0 311 0 0 0 0 99 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 270 MEAN 1 MAX 1222 MIN 0 AC_FT 535 FCDMC Annual Surface Water Report, Water Year 2020 Page 445 Lake Margherite – ID #59007 Site Data LOCATION On Hayden Road about 1/4 mile south of Via Linda DRAINAGE AREA 4.91 mi2 STREAM TYPE Engineered Channel JURISDICTION Scottsdale, Arizona WATERSHED Lower Indian Bend SECTION/TOWNSHIP/RANGE S36 T3N R4E LATITUDE N 33° 33' 49.2" | +33.56367 LONGITUDE W 111° 53' 59.0" | ‐111.89972 STREAMGAGE INSTALLATION DATE 11/24/1997 ‐ WY 1998 AVAILABLE PERIOD OF RECORD (POR) 11/24/1997 ‐ Current LENGTH OF AVAILABLE POR DATA DATA 22.85 Years | 8,347 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.80 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,320.80 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 286 cfs | 2.03 feet | 08/02/2005 FCDMC Annual Surface Water Report, Water Year 2020 Page 446 Watershed Map Lake Margherite - water year peaks 350 Discharge (cfs) 300 250 200 150 100 50 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 447 2015 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/29/2019 03/13/2020 Peak Gage Height (feet) 1.17 1.19 1.49 Hydrograph of peak WY 2020 flow event, 03/13/2020 Flood Flow Frequency Unavailable at this time. FCDMC Annual Surface Water Report, Water Year 2020 Page 448 Peak Discharge (cfs) 67 69 142 Lake Margherite, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 5 11 12 13 13 14 15 16 17 18 19 20 3 21 22 23 24 25 26 27 28 29 5 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 9 0 0 0 13 5 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 69 0 0 0 142 20 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 18 0 0 0 25 10 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 26 MEAN 0 MAX 142 MIN 0 AC_FT 52 FCDMC Annual Surface Water Report, Water Year 2020 Page 449 Laveen Basin, ID #67807 Site Data LOCATION Located near 43rd Avenue and Southern Avenue DRAINAGE AREA Not Determined STREAM TYPE Flood control basin JURISDICTION Phoenix, Arizona WATERSHED South Mountain SECTION/TOWNSHIP/RANGE S34 T1N R2E LATITUDE N 33° 23' 25.2" | +33.39033 LONGITUDE W 112° 09' 02.6" | ‐112.15072 STREAMGAGE INSTALLATION DATE 11/07/2006 ‐ WY 2007 AVAILABLE PERIOD OF RECORD (POR) 11/07/2006 ‐ Current LENGTH OF AVAILABLE POR DATA 13.90 Years | 5,077 Days DATA GAPS IN POR None STAGE GAGE TYPE Pressure Transducer STAGE GAGE ELEVATION 0.20 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,003.12 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY CREST ELEVATION 20.0 feet Gage Height TOP OF BASIN ELEVATION 21.2 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 450 Watershed Map Laveen Basin - water year peaks Volume (acre-feet) 140 120 100 80 60 40 20 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 451 2020 2025 WY2020 Events Date of Peak 11/21/2019 11/29/2019 12/25/2019 01/21/2020 02/11/2020 02/22/2020 03/13/2020 Peak Gage Height (feet) 3.31 4.23 1.69 1.17 2.26 4.26 5.33 Peak Volume (ac‐ft) 5.4 8.5 0.4 0.2 2.0 8.6 12.3 Hydrograph of peak WY 2020 impoundment event, 03/13/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 452 Percent Spillway Capacity 4.3 6.7 0.4 0.2 1.6 6.8 9.7 Laveen Basin, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 9 2 7 3 2 4 5 6 7 8 9 10 11 7 6 12 7 10 13 6 12 14 4 12 15 1 11 16 9 17 7 18 6 19 7 20 4 4 21 9 22 10 8 23 8 12 24 7 11 25 6 1 10 26 5 1 9 27 1 2 8 28 1 7 29 10 3 30 11 --31 ---------------------------------------------------------------------------------------TOTAL 0 71 24 0 93 85 0 0 0 0 0 0 MEAN 0 2 1 0 3 3 0 0 0 0 0 0 MAX 0 12 10 0 12 12 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 141 48 0 184 169 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 273 MEAN 1 MAX 12 MIN 0 AC_FT 542 FCDMC Annual Surface Water Report, Water Year 2020 Page 453 Laveen Basin, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 4 2 2 3 4 5 6 7 8 9 10 11 1 2 12 1 5 13 1 12 14 9 15 6 16 3 17 2 18 1 19 2 20 1 1 21 3 22 4 5 23 3 7 24 2 6 25 1 4 26 3 27 2 28 1 29 6 30 6 --31 ---------------------------------------------------------------------------------------MEAN 0 1 0 0 1 1 0 0 0 0 0 0 MAX 0 8 4 0 9 13 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 13 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 454 Laveen Basin, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 1.0 0.2 2.8 1.0 0.6 1.4 0.7 0.2 0.2 0.2 0.2 0.2 2 0.8 0.2 2.1 0.9 0.6 1.2 0.7 0.2 0.2 0.2 0.2 0.2 3 0.8 0.2 1.6 0.9 0.6 1.1 0.7 0.2 0.2 0.2 0.2 0.2 4 0.7 0.2 1.4 0.8 0.6 1.1 0.8 0.2 0.2 0.2 0.2 0.2 5 0.7 0.2 1.2 0.7 0.5 1.0 0.8 0.2 0.2 0.2 0.2 0.2 6 0.7 0.2 1.2 0.7 0.5 1.0 0.7 0.2 0.2 0.2 0.2 0.2 7 0.6 0.2 1.1 0.7 0.5 1.0 0.7 0.2 0.2 0.2 0.2 0.2 8 0.6 0.2 1.4 0.6 0.5 0.9 0.7 0.2 0.2 0.2 0.2 0.2 9 0.5 0.2 1.2 0.6 0.5 0.9 0.7 0.2 0.2 0.2 0.2 0.2 10 0.5 0.2 0.4 0.5 0.4 0.8 0.7 0.2 0.2 0.2 0.2 0.2 11 0.4 0.2 0.2 0.5 2.0 2.2 0.7 0.2 0.2 0.2 0.2 0.2 12 0.3 0.2 0.2 0.5 2.1 3.3 0.7 0.2 0.2 0.2 0.2 0.2 13 0.2 0.2 0.2 0.5 1.9 5.3 0.7 0.2 0.2 0.2 0.2 0.2 14 0.2 0.2 0.2 0.4 1.8 4.4 0.7 0.2 0.2 0.2 0.2 0.2 15 0.2 0.2 0.2 0.4 1.6 3.3 0.7 0.2 0.2 0.2 0.2 0.2 16 0.2 0.2 0.2 0.4 1.5 2.7 0.6 0.2 0.2 0.2 0.2 0.2 17 0.2 0.2 0.2 0.4 1.3 2.3 0.6 0.2 0.2 0.2 0.2 0.2 18 0.2 0.2 0.2 0.3 1.2 2.0 0.7 0.2 0.2 0.2 0.2 0.2 19 0.2 0.2 0.2 0.2 1.1 2.2 0.7 0.2 0.2 0.2 0.2 0.2 20 0.2 1.4 0.2 0.2 1.0 1.8 0.6 0.2 0.2 0.2 0.2 0.2 21 0.2 2.6 0.2 0.9 1.0 1.3 0.6 0.2 0.2 0.2 0.2 0.2 22 0.2 3.0 0.2 1.1 2.9 1.0 0.6 0.2 0.2 0.2 0.2 0.2 23 0.2 2.5 0.2 1.0 3.9 1.0 0.6 0.2 0.2 0.2 0.2 0.2 24 0.2 2.2 0.5 0.9 3.4 1.0 0.5 0.2 0.2 0.2 0.2 0.2 25 0.2 1.9 1.2 0.9 3.0 0.9 0.5 0.2 0.2 0.2 0.2 0.2 26 0.2 1.8 1.6 0.8 2.7 0.8 0.2 0.2 0.2 0.2 0.2 0.2 27 0.2 1.6 1.6 0.8 2.4 0.8 0.2 0.2 0.2 0.2 0.2 0.2 28 0.2 1.3 1.6 0.8 2.0 0.8 0.2 0.2 0.2 0.2 0.2 0.2 29 0.2 3.4 1.4 0.7 1.7 0.8 0.2 0.2 0.2 0.2 0.2 0.2 30 0.2 3.6 1.2 0.7 --0.8 0.2 0.2 0.2 0.2 0.2 0.2 31 0.2 --1.1 0.7 --0.7 --0.2 --0.2 0.2 -------------------------------------------------------------------------------MEAN 0.4 1.0 0.9 0.7 1.5 1.6 0.6 0.2 0.2 0.2 0.2 0.2 MAX 1.0 4.2 3.0 1.2 4.3 5.4 0.8 0.2 0.2 0.2 0.2 0.2 MIN 0.2 0.2 0.2 0.2 0.4 0.7 0.2 0.2 0.2 0.2 0.2 0.2 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.63 MAX 5.43 MIN 0.20 FCDMC Annual Surface Water Report, Water Year 2020 Page 455 Magma FRS, ID #42307 Site Data LOCATION Located east of Hunt Highway along Arizona Farms Road DRAINAGE AREA 20.6 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Florence, Arizona WATERSHED Gila / Queen Creek SECTION/TOWNSHIP/RANGE S35 T3S R9E LATITUDE N 33° 07' 11.2" | +33.11978 LONGITUDE W 111° 24' 08.9" | ‐111.40248 STREAMGAGE INSTALLATION DATE 11/15/2007 ‐ WY 2008 AVAILABLE PERIOD OF RECORD (POR) 11/15/2007 ‐ Current Day LENGTH OF AVAILABLE POR RECORD 12.88 Years | 4,704 Days DATA GAPS IN POR 04/12/2012 ‐ 11/03/2013 STAGE GAGE ELEVATION 1,601.40 feet NAVD88 STAFF GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,601.00 feet NAVD88 POINT OF ZERO FLOW 1,601.50 feet NAVD88 SPILLWAY ELEVATION 1,623.20 feet NAVD88 TOP OF DAM ELEVATION 1,628.30 feet NAVD88 NORMAL DRAWDOWN RATE ‐0.25 feet per hour FCDMC Annual Surface Water Report, Water Year 2020 Page 456 Watershed Map Magma FRS - water year peaks Volume (acre-feet) 3,500 3,000 2,500 2,000 1,500 1,000 500 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 457 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Volume (ac‐ft) Percent Spillway Capacity 11/29/2019 2.99 0.1 0.1 Hydrograph of peak WY 2020 impoundment event, 11/29/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 458 Magma FRS, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 4 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 4 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 16 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 8 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 4 MEAN 0 MAX 16 MIN 0 AC_FT 8 FCDMC Annual Surface Water Report, Water Year 2020 Page 459 Magma FRS, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 0 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 460 Magma FRS, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 4 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 5 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 6 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 7 0.1 0.1 0.1 0.1 --0.1 0.1 0.1 0.1 0.1 0.1 0.1 8 0.1 0.1 0.1 0.1 --0.1 0.1 0.1 0.1 0.1 0.1 0.1 9 0.1 0.1 0.1 0.1 --0.1 0.1 0.1 0.1 0.1 0.1 0.1 10 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 11 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 12 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 13 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 14 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 15 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 16 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 17 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 18 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 19 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 20 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 21 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 22 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 23 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 24 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 25 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 26 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 27 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 28 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 29 0.1 1.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 30 0.1 0.3 0.1 0.1 --0.1 0.1 0.1 0.1 0.1 0.1 0.1 31 0.1 --0.1 0.1 --0.1 --0.1 --0.1 0.1 -------------------------------------------------------------------------------MEAN 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 MAX 0.1 3.0 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 MIN 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.15 MAX 2.99 MIN 0.15 FCDMC Annual Surface Water Report, Water Year 2020 Page 461 Martinez Creek, ID #49507 Site Data LOCATION About a mile northwest of the Scenic Loop Road and US 93 intersection DRAINAGE AREA 105 mi2 STREAM TYPE Natural Stream JURISDICTION Yavapai County, Arizona WATERSHED Lower Hassayampa SECTION/TOWNSHIP/RANGE S20 T8N R5W LATITUDE N 34° 01' 41.8" | +34.02828 LONGITUDE W 112° 47' 32.1" | ‐112.79224 STREAMGAGE INSTALLATION DATE 11/23/1994 ‐ WY 1995 AVAILABLE PERIOD OF RECORD (POR) 11/23/1994 ‐ Current LENGTH OF AVAILABLE POR DATA 25.86 Years | 9,444 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 2.80 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 2,305.96 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 10,562 cfs | 11.42 feet | 07/18/2015 FCDMC Annual Surface Water Report, Water Year 2020 Page 462 Watershed Map Martinez Creek - water year peaks 12,000 Discharge (cfs) 10,000 8,000 6,000 4,000 2,000 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 463 2015 2020 2025 WY2020 Events Date of Peak 11/29/2019 03/13/2020 03/14/2020 03/19/2020 Peak Gage Height (feet) 5.97 3.65 3.10 3.15 Peak Discharge (cfs) 1,479 146 88 90 Hydrograph of peak WY 2020 flow event, 11/29/2019 Flood Flow Frequency Flood Flow Frequency N=26, HEC‐WRC computation (based on 26 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 1,960 6,130 10,200 14,800 21,500 26,900 NOTE: These results are based on limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 464 Martinez Creek, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 --15 14 4 15 16 17 18 19 13 20 21 22 23 24 25 26 27 28 29 89 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 89 0 0 0 32 0 0 0 0 0 0 MEAN 0 3 0 0 0 1 0 0 0 0 0 0 MAX 0 1479 0 0 0 146 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 177 0 0 0 64 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 122 MEAN 0 MAX 1479 MIN 0 AC_FT 242 FCDMC Annual Surface Water Report, Water Year 2020 Page 465 McDowell Mountain Road, ID #76007 Site Data LOCATION Located in the southeast part of McDowell Mountain Park DRAINAGE AREA 11.9 mi2 STREAM TYPE Natural Stream JURISDICTION Maricopa County, Arizona WATERSHED Lower Verde SECTION/TOWNSHIP/RANGE S26 T4N R6E LATITUDE N 33° 39' 24.1" | +33.65667 LONGITUDE W 111° 42' 22.8" | ‐111.70634 STREAMGAGE INSTALLATION DATE 05/18/2004 ‐ WY 2004 AVAILABLE PERIOD OF RECORD (POR) 05/18/2004 ‐ Current LENGTH OF AVAILABLE POR DATA 16.37 Years | 5,980 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.00 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,629.69 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 652 cfs | 1.77 feet | 07/23/2007 FCDMC Annual Surface Water Report, Water Year 2020 Page 466 Watershed Map McDowell Mountain Road - water year peaks 700 Discharge (cfs) 600 500 400 300 200 100 0 2000 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 467 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Discharge (cfs) 11/29/2019 0.22 15 Hydrograph of peak WY 2020 flow event, 11/29/2019 Flood Flow Frequency Flood Flow Frequency N=17, HEC‐WRC computation (based on 17 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 43 142 262 432 752 1,080 NOTE: These results are based on very limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 468 McDowell Mountain Road, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 2 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 1 0 0 0 0 0 0 0 0 0 2 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 15 0 0 0 0 0 0 0 0 0 349 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 2 0 0 0 0 0 0 0 0 0 4 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 3 MEAN 0 MAX 349 MIN 0 AC_FT 5 FCDMC Annual Surface Water Report, Water Year 2020 Page 469 McMicken Dam at Bell Road, ID #71507 Site Data LOCATION Located on the south side of McMicken Dam at Bell Road DRAINAGE AREA 247 mi2 at outlet gage STREAM TYPE Dam Pool Pass‐through JURISDICTION Surprise, Arizona WATERSHED Trilby SECTION/TOWNSHIP/RANGE S03 T3N R2W LATITUDE N 33° 38' 17.6" | +33.63823 LONGITUDE W 112° 27' 41.1" | ‐112.46141 STREAMGAGE INSTALLATION DATE 03/04/2009 ‐ WY 2009 AVAILABLE PERIOD OF RECORD (POR) 03/04/2009 ‐ Current LENGTH OF AVAILABLE POR DATA 11.58 Years | 4,229 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.35 feet Gage Height STAFF GAGES None CREST STAGE GAGES None ZERO GAGE HEIGHT ELEVATION 1,335.68 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height EXTREME FOR PERIOD OF RECORD 784 cfs | 5.80 feet GH | 09/08/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 470 Watershed Map McMicken Dam at Bell Road - water year peaks 900 Discharge (cfs) 800 700 600 500 400 300 200 100 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 471 2020 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) No runoff recorded Hydrograph of peak WY 2020 flow event There was no runoff recorded in Water Year 2020. Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 472 McMicken Dam at Bell Road, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 473 McMicken Dam, ID #71707 Site Data LOCATION Gage is located about 3 miles north of Bell Road DRAINAGE AREA 257.9 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Surprise, Arizona WATERSHED Trilby SECTION/TOWNSHIP/RANGE S24 T4N R2W LATITUDE N 33° 40' 37.2" | +33.67699 LONGITUDE W 112° 25' 24.3" | ‐112.42342 STREAMGAGE INSTALLATION DATE 03/20/1983 ‐ WY 1983 AVAILABLE PERIOD OF RECORD (POR) 02/18/1988 ‐ Current LENGTH OF AVAILABLE POR DATA 32.62 Years | 11,914 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 1.60 feet Gage Height STAFF GAGES 3 ZERO GAGE HEIGHT ELEVATION 1,336.00 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height EMERGENCY SPILLWAY CREST ELEVATION 19.25 feet Gage Height TOP OF DAM ELEVATION 25.8 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 474 Watershed Map McMicken Dam - water year peaks Volume (acre-feet) 3,000 2,500 2,000 1,500 1,000 500 0 1985 1990 1995 2000 2005 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 475 2010 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Volume (ac‐ft) No impoundments Hydrograph of peak WY 2020 impoundment event There were no impoundments recorded in Water Year 2020. FCDMC Annual Surface Water Report, Water Year 2020 Page 476 Percent Spillway Capacity McMicken Dam, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 477 McMicken Dam, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 0 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 478 McMicken Dam, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 2 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 3 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 4 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 5 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 7 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 8 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 9 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 10 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 11 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 12 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 13 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 14 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 15 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 16 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 17 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 18 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 19 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 20 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 21 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 22 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 23 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 24 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 25 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 26 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 27 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 28 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 29 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 30 1.6 1.6 1.6 1.6 --1.6 1.6 1.6 1.6 1.6 1.6 1.6 31 1.6 --1.6 1.6 --1.6 --1.6 --1.6 1.6 -------------------------------------------------------------------------------MEAN 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 MAX 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 MIN 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 -----------------------------------------------------------------------------WTR YR 2020 MEAN 1.60 MAX 1.60 MIN 1.60 FCDMC Annual Surface Water Report, Water Year 2020 Page 479 McMicken Floodway, ID #71307 Site Data LOCATION Near the intersection of 163rd and Grand Avenues DRAINAGE AREA 305 mi2 STREAM TYPE Engineered Channel JURISDICTION Surprise, Arizona WATERSHED Trilby SECTION/TOWNSHIP/RANGE S18 T4N R1W LATITUDE N 33° 41' 07.2" | +33.68532 LONGITUDE W 112° 24' 31.1" | ‐112.40864 STREAMGAGE INSTALLATION DATE 05/19/1992 ‐ WY 1992 AVAILABLE PERIOD OF RECORD (POR) 05/19/1992 ‐ Current LENGTH OF AVAILABLE POR DATA 28.37 Years | 10,362 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.15 feet Gage Height STAFF GAGES 2 CREST STAGE GAGES 2 ZERO GAGE HEIGHT ELEVATION 1,325.07 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 1,110 cfs | 4.98 feet | 09/08/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 480 Watershed Map McMicken Floodway - water year peaks 1,200 Discharge (cfs) 1,000 800 600 400 200 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 481 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) 02/18/2020 1.15 23 Hydrograph of peak WY 2020 flow event, 02/18/2020 Flood Flow Frequency Flood Flow Frequency N=29, HEC‐WRC computation (based on 29 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 45 147 257 396 622 825 NOTE: These results are based on very limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 482 McMicken Floodway, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 2 18 13 19 12 20 --21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 27 0 0 0 0 0 0 0 MEAN 0 0 0 0 1 0 0 0 0 0 0 0 MAX 0 0 0 0 23 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 54 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 27 MEAN 0 MAX 23 MIN 0 AC_FT 54 FCDMC Annual Surface Water Report, Water Year 2020 Page 483 Mineral Canyon Basin, ID #68807 Site Data LOCATION In South Mountain Park near Central Avenue and Mineral Road DRAINAGE AREA 3.46 mi2 STREAM TYPE Flood control basin on natural stream JURISDICTION Phoenix, Arizona WATERSHED South Mountain SECTION/TOWNSHIP/RANGE S08 T1S R3E LATITUDE N 33° 21' 20.9" | +33.35580 LONGITUDE W 112° 04' 13.8" | ‐112.07051 STREAMGAGE INSTALLATION DATE 09/10/2015 ‐ WY 2015 AVAILABLE PERIOD OF RECORD (POR) 09/10/2015 ‐ Current LENGTH OF AVAILABLE POR RECORD 5.06 Years | 1,848 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 2.00 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 0.00 feet Gage Height POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY CREST ELEVATION No spillway TOP OF BASIN ELEVATION 28.5 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 484 Watershed Map Volume (acre-feet) Mineral Canyon Basin - water year peaks 100 90 80 70 60 50 40 30 20 10 0 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 485 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Volume (ac‐ft) None Hydrograph of peak WY 2020 impoundment event, No impoundments recorded in Water Year 2020. FCDMC Annual Surface Water Report, Water Year 2020 Page 486 Percent Spillway Capacity Mineral Canyon Basin, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 --19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 487 Mineral Canyon Basin, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 --19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 0 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 488 Mineral Canyon Basin, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 3 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 4 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 5 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 6 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 7 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 8 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 9 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 10 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 11 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 12 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 13 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 14 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 15 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 16 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 17 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 18 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 --2.0 19 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 20 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 21 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 22 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 23 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 24 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 25 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 26 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 27 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 28 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 29 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 30 2.0 2.0 2.0 2.0 --2.0 2.0 2.0 2.0 2.0 2.0 2.0 31 2.0 --2.0 2.0 --2.0 --2.0 --2.0 2.0 -------------------------------------------------------------------------------MEAN 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 MAX 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 MIN 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 2.00 MAX 2.00 MIN 2.00 FCDMC Annual Surface Water Report, Water Year 2020 Page 489 New River Fire, ID #62707 Site Data LOCATION North of Table Mesa Road about 4 miles east of I‐17 DRAINAGE AREA 62 mi2 STREAM TYPE Natural Stream JURISDICTION Maricopa County, Arizona WATERSHED Upper New River SECTION/TOWNSHIP/RANGE S04 T7N R3E LATITUDE N 33° 58' 33.1" | +33.97585 LONGITUDE W 112° 03' 38.3" | ‐112.06063 STREAMGAGE INSTALLATION DATE 07/18/2005 ‐ WY 2005 AVAILABLE PERIOD OF RECORD (POR) 07/20/2005 ‐ Current LENGTH OF AVAILABLE POR DATA 15.20 Years | 5,552 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 2.00 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 2,469.10 feet NAVD88 POINT OF ZERO FLOW ‐1.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 32,584 cfs | 11.0 feet | 08/19/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 490 Watershed Map New River Fire - water year peaks 35,000 Discharge (cfs) 30,000 25,000 20,000 15,000 10,000 5,000 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 491 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/21/2019 11/24/2019 11/29/2019 12/22/2019 12/22/2019 12/24/2019 03/13/2020 Peak Gage Height (feet) 6.75 1.91 1.66 6.20 1.46 2.01 2.01 3.09 Hydrograph of peak WY 2020 flow event, 11/20/2019 Flood Flow Frequency Flood Flow Frequency FEMA Flood Insurance Study (at USGS gage, 3 miles downstream) 100‐year 34,500 FCDMC Annual Surface Water Report, Water Year 2020 Page 492 Peak Discharge (cfs) 12,151 1,125 855 10,660 677 1,245 1,245 3,210 New River Fire, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 --2 --3 --4 --5 --6 7 8 9 10 11 12 13 1076 14 --132 15 16 17 --18 --19 --20 909 --21 223 22 30 197 23 24 26 233 25 26 27 28 --29 1814 --30 ----31 -----------------------------------------------------------------------------------------TOTAL 0 3002 429 0 0 1208 0 0 0 0 0 0 MEAN 0 100 14 0 0 39 0 0 0 0 0 0 MAX 0 12151 1245 0 0 3210 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 5955 852 0 0 2397 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 4640 MEAN 13 MAX 12151 MIN 0 AC_FT 9204 FCDMC Annual Surface Water Report, Water Year 2020 Page 493 New River at SR303L, ID #62213 Site Data LOCATION About 2 miles east of Lake Pleasant Parkway on Loop 303 DRAINAGE AREA 122.2 mi2 STREAM TYPE Natural Stream JURISDICTION Peoria, Arizona WATERSHED Upper New River SECTION/TOWNSHIP/RANGE S14 T5N R1E LATITUDE N 33° 38' 16.6" | +33.63975 LONGITUDE W 112° 14' 22.5" | ‐112.2396 STREAMGAGE INSTALLATION DATE 12/12/2019 ‐ WY 2020 AVAILABLE PERIOD OF RECORD (POR) 12/12/2019 ‐ Current LENGTH OF AVAILABLE POR DATA 0.80 Years | 294 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 2.00 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,490.00 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 3,107 cfs | 4.81 feet | 03/13/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 494 Watershed Map ek re C e ua w Li d Li Cr ttl e Y Yavapai avapaiCounty County S ev e n n wo od C ree k Co n ty Ci Rod g er C re e k Wi ll ow as W rin R gs W tto W as a ys F n o rk od wo C re ek e re pe v i Gra Cr ee k Sp r in g k h ne Wa Gallo w ay W a h ee k Ca ve C r Ap ac he Was h Sk un k eC Blue Wash sh s r W as h ve D ea dm an Agua Fri a New R i Ri ve r h Sp ow e Mo r ga im sh tto at t h as sW k Co M k ee Cr ug mb u H r ee se C Hor eL M ag D ry W as h n t tl k ee Cr ay eM gi reek rC ulde Bo ek re C k ee Cr le Tu tle eek Cr ek s ek Sq k ee k oo t le ee No rth Ca ny o ee k Li t Cr Camp Cree Cr ek re eC Lim eek Cr Ca ter Cre B it e Re d ek nw re tto C Co k Cow ee Cr Cr ch en Fr ck horn C re od ek h As Bu k S la t n tto Co wo sley a Can l W as h ard W ei r Be Discharge (cfs) New River at SR303L - water year peaks 5,000 4,500 4,000 3,500 3,000 2,500 2,000 1,500 1,000 500 0 2015 2020 Water Year Gage installed in Water Year 2020 on December 12, 2019. FCDMC Annual Surface Water Report, Water Year 2020 Page 495 2025 WY2020 Events Date of Peak 12/25/2019 12/27/2019 03/13/2020 03/19/2020 Peak Gage Height (feet) 3.78 3.75 4.81 3.84 Peak Discharge (cfs) 806 764 3,107 888 Hydrograph of peak WY 2020 flow event, 11/20/2019 Flood Flow Frequency Flood Flow Frequency Source: USGS Streamstats 2‐year 5‐year 10‐year 25‐year 50‐year 100‐year 1,230 3,740 6,560 10,700 15,800 22,400 FCDMC Annual Surface Water Report, Water Year 2020 Page 496 New River at SR303L, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 ------2 ------3 --------4 --------5 ------6 ------7 ------8 ------9 ------10 ----------11 ------12 ----13 ------1915 14 ----932 --15 ----208 --16 ----17 ----18 ----19 ----744 20 ------298 --21 ------22 ----23 ----24 ------25 ----330 26 ----27 ----104 --28 ----29 ----30 --------31 -----------------------------------------------------------------------------------------TOTAL ----590 0 0 3888 0 0 0 0 0 0 MEAN ----19 0 0 125 0 0 0 0 0 0 MAX ----806 0 0 3107 0 0 0 0 0 0 MIN ----0 0 0 0 0 0 0 0 0 0 AC_FT ----- 1171 0 0 7713 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 4479 MEAN 12 MAX 3107 MIN 0 AC_FT 8884 FCDMC Annual Surface Water Report, Water Year 2020 Page 497 New River Dam Pool, ID #62017 Site Data LOCATION Near 75th Avenue north of Jomax Road DRAINAGE AREA 171 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Peoria, Arizona WATERSHED Upper New River SECTION/TOWNSHIP/RANGE S35 T5N R1E LATITUDE N 33° 44' 09.1" | +33.73585 LONGITUDE W 112° 13' 31.8" | ‐112.22550 STREAMGAGE INSTALLATION DATE 04/15/1986 ‐ WY 1986 AVAILABLE PERIOD OF RECORD (POR) 08/30/1988 ‐ Current LENGTH OF AVAILABLE POR DATA 32.09 Years | 11,720 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 2.85 feet Gage Height STAFF GAGES 21 ZERO GAGE HEIGHT ELEVATION 1,391.50 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height STANDARD PROJECT FLOOD 49,300 acre‐feet / 45,000 cfs inflow / 2,665 cfs outflow PROBABLE MAXIMUM FLOOD 105,000 acre‐feet / 144,000 cfs inflow / 30,000 cfs outflow SPILLWAY ELEVATION 67.0 feet Gage Height TOP OF DAM ELEVATION 98.0 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 498 Watershed Map New River Dam Pool - water year peaks 16,000 Volume (acre-feet) 14,000 12,000 10,000 8,000 6,000 4,000 2,000 0 1985 1990 1995 2000 2005 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 499 2010 2015 2020 2025 WY2020 Events Date of Peak 11/21/2019 11/29/2019 12/28/2019 03/13/2020 03/20/2020 Peak Gage Height (feet) 10.98 12.62 5.11 6.75 4.25 Peak Volume (ac‐ft) 757.1 1,035.2 162.8 270.0 116.0 Hydrograph of peak WY 2020 impoundment event, 11/29/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 500 Percent Spillway Capacity 1.7 2.3 0.3 0.6 0.2 New River Dam Pool, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 200 2 18 3 4 5 6 7 8 9 10 11 12 13 107 29 14 217 58 15 69 58 16 58 17 58 18 58 19 45 58 20 6 88 58 21 586 58 22 402 58 23 133 58 24 58 25 58 26 58 27 2 58 28 135 58 29 470 104 30 638 17 --31 ---------------------------------------------------------------------------------------MEAN 0 74 15 0 0 17 30 0 0 0 0 0 MAX 0 1035 307 0 0 272 58 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 11 MAX 1035 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 501 New River Dam Pool, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2.9 2.9 5.6 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2 2.9 2.9 3.0 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 3 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 4 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 5 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 6 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 7 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 8 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 10 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 11 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 12 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 13 2.9 2.9 2.9 2.9 2.9 4.4 2.9 2.9 2.9 2.9 2.9 2.9 14 2.9 2.9 2.9 2.9 2.9 6.0 2.9 2.9 2.9 2.9 2.9 2.9 15 2.9 2.9 2.9 2.9 2.9 3.7 2.9 2.9 2.9 2.9 2.9 2.9 16 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 17 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 18 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 19 2.9 2.9 2.9 2.9 2.9 3.3 2.9 2.9 2.9 2.9 2.9 2.9 20 2.9 2.9 2.9 2.9 2.9 3.6 2.9 2.9 2.9 2.9 2.9 2.9 21 2.9 9.7 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 22 2.9 8.2 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 23 2.9 4.5 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 24 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 25 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 26 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 27 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 28 2.9 2.9 4.6 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 29 2.9 7.5 4.0 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 30 2.9 10.1 3.0 2.9 --2.9 2.9 2.9 2.9 2.9 2.9 2.9 31 2.9 --2.9 2.9 --2.9 --2.9 --2.9 2.9 -------------------------------------------------------------------------------MEAN 2.9 3.7 3.1 2.9 2.9 3.1 2.9 2.9 2.9 2.9 2.9 2.9 MAX 2.9 12.6 7.2 2.9 2.9 6.8 2.9 2.9 2.9 2.9 2.9 2.9 MIN 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 -----------------------------------------------------------------------------WTR YR 2020 MEAN 2.99 MAX 12.62 MIN 2.88 FCDMC Annual Surface Water Report, Water Year 2020 Page 502 New River Dam Outlet, ID #62007 Site Data LOCATION Near 75th Avenue north of Jomax Road DRAINAGE AREA 171 mi2 STREAM TYPE Engineered Channel JURISDICTION Peoria, Arizona WATERSHED Lower New River SECTION/TOWNSHIP/RANGE S35 T5N R1E LATITUDE N 33° 44' 09.1" | +33.73585 LONGITUDE W 112° 13' 31.8" | ‐112.22550 STREAMGAGE INSTALLATION DATE 04/15/1986 ‐ WY 1986 AVAILABLE PERIOD OF RECORD (POR) 08/30/1988 ‐ Current LENGTH OF AVAILABLE POR DATA 32.09 Years | 11,720 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.68 feet Gage Height STAFF GAGES 1 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,378.15 feet NAVD88 POINT OF ZERO FLOW 0.2 feet Gage Height EXTREME FOR PERIOD OF RECORD* 1,570 cfs | 9.36 feet | 02/15/1995 *Extreme for period of record did not occur on the date of maximum pool stage (01/08/1993) because the gage may have failed and no data are available at this gage on that date. FCDMC Annual Surface Water Report, Water Year 2020 Page 503 Watershed Map New River Dam Outlet - water year peaks 1,800 Discharge (cfs) 1,600 1,400 1,200 1,000 800 600 400 200 0 1985 1990 1995 2000 2005 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 504 2010 2015 2020 2025 WY2020 Events Date of Peak 11/21/2019 11/29/2019 12/28/2019 03/13/2020 03/19/2020 Peak Gage Height 7.12 7.89 5.15 5.82 4.85 Peak Discharge (cfs) 585 823 166 278 125 Hydrograph of peak WY 2020 flow event, 11/29/2019 Flood Flow Frequency Flows past this gage are regulated by New River Dam directly upstream. Flood Flow Frequency is therefore not valid. FCDMC Annual Surface Water Report, Water Year 2020 Page 505 New River Dam Outlet, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 1 172 9 2 1 44 5 3 1 10 4 4 5 2 --5 4 2 --6 2 1 7 2 1 8 2 9 1 10 11 12 13 115 14 220 15 97 16 24 17 9 18 4 19 72 20 11 98 21 476 35 22 349 12 23 129 6 24 21 3 25 5 3 2 26 3 59 2 27 2 37 1 28 2 128 29 362 99 30 491 41 --31 --17 -------------------------------------------------------------------------------------TOTAL 4 1852 626 26 0 702 0 0 0 0 0 0 MEAN 0 62 20 1 0 23 0 0 0 0 0 0 MAX 1 823 284 9 0 284 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 8 3674 1242 51 0 1392 1 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 3210 MEAN 9 MAX 823 MIN 0 AC_FT 6367 FCDMC Annual Surface Water Report, Water Year 2020 Page 506 New River at Bell Road, ID #61707 Site Data LOCATION On Bell Road west of Loop 101 DRAINAGE AREA 185 mi2 STREAM TYPE Channelized Natural Stream JURISDICTION Peoria, Arizona WATERSHED Lower New River SECTION/TOWNSHIP/RANGE S03 T3N R1E LATITUDE N 33° 38' 16.6" | +33.63795 LONGITUDE W 112° 14' 22.5" | ‐112.23959 STREAMGAGE INSTALLATION DATE 04/04/1990 ‐ WY 1990 AVAILABLE PERIOD OF RECORD (POR) 04/04/1990 ‐ Current LENGTH OF AVAILABLE POR DATA 30.49 Years | 11,138 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.30 feet Gage Height STAFF GAGES 2 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,192.11 feet NAVD88 POINT OF ZERO FLOW ‐0.1 feet Gage Height EXTREME FOR PERIOD OF RECORD 4,005 cfs | 5.77 feet | 09/03/1990 EXTREME OUTSIDE PERIOD OF RECORD 14,600 cfs | 12/19/1967 FCDMC Annual Surface Water Report, Water Year 2020 Page 507 Watershed Map New River at Bell Road - water year peaks 4,500 Discharge (cfs) 4,000 3,500 3,000 2,500 2,000 1,500 1,000 500 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 508 2015 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/21/2019 11/29/2019 03/13/2020 Peak Gage Height (feet) 0.85 1.33 1.50 0.70 Peak Discharge (cfs) 370 811 1,013 272 Hydrograph of peak WY 2020 flow event, 11/29/2019 Flood Flow Frequency Flood Flow Frequency N=31, HEC‐WRC computation (based on 31 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 172 1,160 2,660 4,870 8,840 12,600 NOTE(1): These results are based on limited data. NOTE(2): New River Dam upstream limits the peak discharge from the upper portion of the watershed. FCDMC Annual Surface Water Report, Water Year 2020 Page 509 New River at Bell Road, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 138 2 3 4 5 6 7 8 9 10 11 12 13 31 14 210 15 16 17 18 19 20 56 21 545 22 486 23 57 24 25 26 27 28 29 281 30 757 --31 ---------------------------------------------------------------------------------------TOTAL 0 2181 138 0 0 241 0 0 0 0 0 0 MEAN 0 73 4 0 0 8 0 0 0 0 0 0 MAX 0 1013 300 0 0 273 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 4326 273 0 0 477 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 2559 MEAN 7 MAX 1013 MIN 0 AC_FT 5076 FCDMC Annual Surface Water Report, Water Year 2020 Page 510 New River at Glendale Avenue, ID #61507 (transducer), #61513 (radar) Site Data LOCATION West of 99th Avenue on Glendale Avenue DRAINAGE AREA 600 mi2 STREAM TYPE Channelized Natural Stream JURISDICTION Glendale, Arizona WATERSHED Lower New River SECTION/TOWNSHIP/RANGE S05 T2N R1E LATITUDE N 33° 32' 11.8" | +33.53661 LONGITUDE W 112° 16' 53.3" | ‐112.28146 STREAMGAGE INSTALLATION DATE 03/21/1990 ‐ WY 1990 AVAILABLE PERIOD OF RECORD (POR) 03/21/1990 ‐ Current LENGTH OF AVAILABLE POR DATA 30.53 Years | 11,152 Days DATA GAPS IN POR 08/23/2006 ‐ 03/07/2007 STAGE GAGE TYPES Transducer / RADAR TRANSDUCER GAGE ELEVATION 2.50 feet Gage Height RADAR GAGE ELEVATION 20.75 feet Gage Height STAFF GAGES 1 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,045.84 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 10,266 cfs | 2.90 feet | 02/10/1993 EXTREME OUTSIDE PERIOD OF RECORD 38,000 cfs | 08/1943 FCDMC Annual Surface Water Report, Water Year 2020 Page 511 Watershed Map New River at Glendale Avenue - water year peaks 12,000 Discharge (cfs) 10,000 8,000 6,000 4,000 2,000 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 512 2015 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/29/2019 12/09/2019 12/25/2019 12/25/2019 12/26/2019 12/29/2019 02/11/2020 02/22/2020 03/12/2020 03/12/2020 03/12/2020 03/13/2020 03/14/2020 03/18/2020 03/20/2020 Peak Gage Height (feet) 3.73 3.33 2.28 1.52 1.72 1.72 1.89 2.34 2.35 4.18 4.08 3.91 3.16 2.98 2.07 1.83 Hydrograph of peak WY 2020 flow event, 03/12/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 513 Peak Discharge (cfs) 1,575 987 231 103 133 133 159 244 247 2,371 2,177 1,871 790 600 189 149 Flood Flow Frequency Flood Flow Frequency N=31, HEC‐WRC computation (based on 31 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 1,170 2,750 4,390 6,540 10,300 14,100 NOTE(1): These results are based on limited data. NOTE(2): New River Dam upstream limits the peak discharge from the upper portion of the watershed. The analysis only includes runoff since the New River Dam’s construction. FCDMC Annual Surface Water Report, Water Year 2020 Page 514 New River at Glendale Avenue (#61513), runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 17 22 283 41 20 19 38 28 23 22 26 32 2 16 28 164 31 18 18 47 22 21 22 28 25 3 17 28 62 20 19 18 38 24 25 21 28 24 4 15 25 34 20 19 20 40 29 20 24 26 24 5 16 23 28 23 18 17 33 22 23 27 26 24 6 16 29 27 23 19 18 33 26 24 24 28 23 7 13 29 24 19 25 21 30 24 26 20 25 27 8 12 26 72 17 21 28 27 26 22 28 26 25 9 12 28 60 17 19 24 27 28 26 29 28 29 10 15 32 104 17 22 21 24 30 21 28 27 30 11 14 26 28 18 163 57 24 30 21 24 26 34 12 17 26 18 19 62 215 23 29 25 29 21 38 13 18 23 14 20 26 395 22 27 30 26 26 34 14 15 21 12 28 21 335 29 23 30 24 27 22 15 16 28 15 23 24 211 30 27 28 27 28 22 16 16 27 13 20 23 172 34 28 28 27 27 21 17 15 28 15 23 23 93 29 26 25 28 24 26 18 16 27 20 23 24 68 26 24 24 29 26 23 19 16 21 17 21 26 124 25 23 25 30 25 22 20 15 500 19 22 27 135 23 21 30 26 25 24 21 16 674 20 24 28 104 24 20 29 27 26 30 22 16 368 20 23 145 55 23 21 21 23 29 28 23 14 227 21 20 121 37 25 20 22 20 25 28 24 16 110 63 22 36 33 31 24 21 24 26 28 25 18 43 104 21 23 33 32 27 22 26 20 26 26 18 22 75 21 19 34 32 26 17 26 23 24 27 18 17 83 22 19 40 27 26 20 18 26 21 28 17 16 110 20 20 46 25 22 23 24 20 23 29 13 347 154 18 23 49 23 19 23 17 27 22 30 14 665 118 18 --50 23 22 23 16 27 20 31 15 --69 20 --46 --26 --24 40 -------------------------------------------------------------------------------TOTAL 482 3486 1866 676 1052 2539 868 770 720 759 814 779 MEAN 16 116 60 22 36 82 29 25 24 24 26 26 MAX 22 1575 289 43 282 1207 73 41 38 34 48 43 MIN 10 15 11 14 17 16 17 14 15 15 17 16 AC_FT 956 6915 3701 1342 2086 5036 1721 1528 1428 1505 1615 1546 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 14812 MEAN 40 MAX 1575 MIN 10 AC_FT 29379 NOTE: There is almost always a base flow at this location due to irrigation tail water. FCDMC Annual Surface Water Report, Water Year 2020 Page 515 New River at Glendale Avenue (#61507), runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 239 2 3 4 5 6 7 8 9 10 11 25 12 487 13 419 14 377 15 230 16 17 18 19 20 257 21 390 22 328 23 147 24 25 26 27 28 29 261 30 390 --31 ---------------------------------------------------------------------------------------TOTAL 0 1774 239 0 0 1537 0 0 0 0 0 0 MEAN 0 59 8 0 0 50 0 0 0 0 0 0 MAX 0 647 327 0 0 2371 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 3519 474 0 0 3049 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 3550 MEAN 10 MAX 2371 MIN 0 AC_FT 7042 FCDMC Annual Surface Water Report, Water Year 2020 Page 516 North Heights Dam, ID #78207 Site Data LOCATION Upstream from Golden Eagle Park Dam, to the north and west DRAINAGE AREA 2.13 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Fountain Hills, Arizona WATERSHED Lower Verde SECTION/TOWNSHIP/RANGE S09 T3N R6E LATITUDE N 33° 37' 16.7" | +33.62131 LONGITUDE W 111° 44' 55.3" | ‐111.74868 STREAMGAGE INSTALLATION DATE 10/11/1996 ‐ WY 1997 AVAILABLE PERIOD OF RECORD (POR) 10/11/1996 ‐ Current LENGTH OF AVAILABLE POR DATA 23.97 Years | 8,756 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.25 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,781.26 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY CREST ELEVATION 31.7 feet Gage Height TOP OF DAM ELEVATION 39.6 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 517 Watershed Map Volume (acre-feet) North Heights Dam - water year peaks 20 18 16 14 12 10 8 6 4 2 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 518 2015 2020 2025 WY2020 Events Date of Peak 11/29/2019 02/10/2020 Peak Gage Height (feet) 1.81 7.19 Peak Volume (ac‐ft) 0.1 2.1 Hydrograph of peak WY 2020 impoundment event, 02/10/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 519 Percent Spillway Capacity 0.1 1.6 North Heights Dam, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 7 11 12 13 14 15 16 17 18 19 20 --21 --22 23 24 25 26 27 28 29 2 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 2 0 0 4 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 27 0 0 129 5 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 4 0 0 7 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 6 MEAN 0 MAX 129 MIN 0 AC_FT 12 FCDMC Annual Surface Water Report, Water Year 2020 Page 520 North Heights Dam, volume data Volume, in acre feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 11 12 13 14 15 16 17 18 19 20 --21 --22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 2 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 2 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 521 North Heights Dam, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 5 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 6 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 7 0.2 0.2 0.2 0.2 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 8 0.2 0.2 0.2 0.2 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 9 0.2 0.2 0.2 0.2 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 10 0.2 0.2 0.2 0.2 0.6 0.2 0.2 0.2 0.2 0.2 0.2 0.2 11 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 12 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 13 0.2 0.2 0.2 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 14 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 15 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 16 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 17 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 18 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 19 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 20 0.2 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 21 0.2 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 22 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 23 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 24 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 25 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 26 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 27 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 28 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 29 0.2 0.4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 30 0.2 0.2 0.2 0.2 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 31 0.2 --0.2 0.2 --0.2 --0.2 --0.2 0.2 -------------------------------------------------------------------------------MEAN 0.2 0.3 0.2 0.2 0.3 0.3 0.2 0.2 0.2 0.2 0.2 0.2 MAX 0.2 1.8 0.2 0.2 7.2 0.5 0.2 0.2 0.2 0.2 0.2 0.2 MIN 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.25 MAX 7.19 MIN 0.25 FCDMC Annual Surface Water Report, Water Year 2020 Page 522 Old Crosscut Canal near McDowell Road, ID #4707 Site Data LOCATION Near McDowell Road and SR143 DRAINAGE AREA Undetermined STREAM TYPE Engineered Channel JURISDICTION Phoenix, Arizona WATERSHED Lower ACDC SECTION/TOWNSHIP/RANGE S06 T1N R4E LATITUDE N 33° 27' 41.4" | +33.46149 LONGITUDE W 111° 58' 56.1" | ‐111.98224 STREAMGAGE INSTALLATION DATE 07/27/1994 ‐ WY 1994 AVAILABLE PERIOD OF RECORD (POR) 07/27/1994 ‐ Current LENGTH OF AVAILABLE POR DATA DATA 26.18 Years | 9,563 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.20 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,167.01 feet NAVD88 POINT OF ZERO FLOW ‐0.28 feet Gage Height EXTREME FOR PERIOD OF RECORD 647 cfs | 3.15 feet | 08/03/2017 FCDMC Annual Surface Water Report, Water Year 2020 Page 523 Location Map (watershed not available) Old Crosscut Canal - water year peaks 700 Discharge (cfs) 600 500 400 300 200 100 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 524 2015 2020 2025 WY2020 Events Date of Peak 11/29/2019 02/22/2020 03/11/2020 03/13/2020 03/13/2020 03/18/2020 Peak Gage Height 0.49 0.37 0.32 0.94 0.57 0.24 Peak Discharge (cfs) 52 36 30 121 61 24 Hydrograph of peak WY 2020 flow event, 03/13/2020 Flood Flow Frequency Runoff at this gage is not always in response to rainfall event, and therefore is not appropriate for flood frequency computation. FCDMC Annual Surface Water Report, Water Year 2020 Page 525 Old Crosscut Canal near McDowell Road, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 11 7 8 9 10 11 12 13 6 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 2 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 2 0 0 11 6 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 52 0 0 46 121 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 4 0 0 23 12 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 19 MEAN 0 MAX 121 MIN 0 AC_FT 39 NOTE: There is often a persistent base flow at this site due to SRP releases upstream, and ground water flow into the canal upstream. FCDMC Annual Surface Water Report, Water Year 2020 Page 526 Paradise Lane at 33rd Drive Basin, ID #12407 Site Data LOCATION Located along Paradise Lane at the west end of Conocido Park DRAINAGE AREA Undetermined STREAM TYPE Flood control basin JURISDICTION Phoenix, Arizona WATERSHED Upper ACDC SECTION/TOWNSHIP/RANGE S02 T3N R2E LATITUDE N 33° 37' 56.7" | +33.63240 LONGITUDE W 112° 07' 41.2" | ‐112.12812 STREAMGAGE INSTALLATION DATE 10/08/2015 ‐ WY 2016 AVAILABLE PERIOD OF RECORD (POR) 10/08/2015 ‐ Current LENGTH OF AVAILABLE POR DATA 4.98 Years | 1,820 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.23 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,308.23 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY CREST ELEVATION 4.75 feet Gage Height TOP OF BASIN ELEVATION 4.9 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 527 Location Map Paradise Lane at 33rd Drive Basin - water year peaks Volume (acre-feet) 25 20 15 10 5 0 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 528 2025 WY2020 Events Date of Peak 11/06/2019 11/19/2019 11/20/2019 11/21/2019 11/29/2019 12/09/2019 12/24/2019 12/25/2019 12/27/2019 02/11/2020 02/22/2020 03/11/2020 03/12/2020 03/12/2020 03/13/2020 03/13/2020 03/18/2020 08/30/2020 Peak Gage Height (feet) 0.95 0.60 2.87 1.60 2.32 1.40 1.02 1.97 1.30 1.84 1.99 0.97 1.87 1.65 1.72 2.19 0.90 0.62 Peak Volume (ac‐ft) 6.8 4.0 28.5 12.9 21.0 10.9 7.4 16.9 10.0 15.5 17.1 7.0 15.8 13.4 14.2 19.5 6.4 4.2 Hydrograph of peak WY 2020 impoundment event, 11/20/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 529 Percent Spillway Capacity 8.0 4.7 33.8 15.3 24.9 12.9 8.7 19.9 11.8 18.3 20.2 8.2 18.7 15.9 16.8 23.0 7.6 4.9 Paradise Lane at 33rd Drive Basin, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 2 9 1 10 1 11 7 2 12 7 13 11 14 2 15 16 17 18 3 19 20 16 21 13 1 22 6 23 24 3 25 5 26 27 2 28 29 11 30 --1 31 ---------------------------------------------------------------------------------------TOTAL 0 42 14 0 15 26 0 0 0 0 1 0 MEAN 0 1 0 0 1 1 0 0 0 0 0 0 MAX 0 34 18 0 18 21 0 0 0 1 7 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 82 27 0 29 52 0 0 0 0 1 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 97 MEAN 0 MAX 34 MIN 0 AC_FT 192 FCDMC Annual Surface Water Report, Water Year 2020 Page 530 Paradise Lane at 33rd Drive Basin, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 1 9 1 10 11 5 1 12 4 13 8 14 1 15 16 17 18 1 19 20 14 21 8 22 5 23 24 1 25 4 26 27 1 28 29 8 30 --31 ---------------------------------------------------------------------------------------MEAN 0 1 0 0 0 1 0 0 0 0 0 0 MAX 0 29 17 0 17 19 0 0 0 0 4 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 29 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 531 Paradise Lane at 33rd Drive, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 5 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 6 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 7 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 8 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 9 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 10 0.2 0.2 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 11 0.2 0.2 0.2 0.2 0.7 0.3 0.2 0.2 0.2 0.2 0.2 0.2 12 0.2 0.2 0.2 0.2 0.2 0.7 0.2 0.2 0.2 0.2 0.2 0.2 13 0.2 0.2 0.2 0.2 0.2 1.1 0.2 0.2 0.2 0.2 0.2 0.2 14 0.2 0.2 0.2 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 15 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 16 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 17 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 18 0.2 0.2 0.2 0.2 0.2 0.4 0.2 0.2 0.2 0.2 0.2 0.2 19 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 20 0.2 1.6 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 21 0.2 1.1 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 22 0.2 0.2 0.2 0.2 0.7 0.2 0.2 0.2 0.2 0.2 0.2 0.2 23 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 24 0.2 0.2 0.4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 25 0.2 0.2 0.6 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 26 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 27 0.2 0.2 0.4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 28 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 29 0.2 1.1 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 30 0.2 0.3 0.2 0.2 --0.2 0.2 0.2 0.2 0.2 0.3 0.2 31 0.2 --0.2 0.2 --0.2 --0.2 --0.2 0.2 -------------------------------------------------------------------------------MEAN 0.2 0.3 0.3 0.2 0.3 0.3 0.2 0.2 0.2 0.2 0.2 0.2 MAX 0.2 2.9 2.0 0.2 2.0 2.2 0.2 0.2 0.2 0.2 0.6 0.2 MIN 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.25 MAX 2.87 MIN 0.23 FCDMC Annual Surface Water Report, Water Year 2020 Page 532 Paradise Lane at 47th Avenue Basin, ID #13707 Site Data LOCATION Located on the northeast corner of Paradise Ln and 47th Ave DRAINAGE AREA Undetermined STREAM TYPE Flood control basin JURISDICTION Phoenix, Arizona WATERSHED Upper ACDC SECTION/TOWNSHIP/RANGE S04 T3N R2E LATITUDE N 33° 37' 56.8" | +33.63244 LONGITUDE W 112° 09' 31.4" | ‐112.15873 STREAMGAGE INSTALLATION DATE 10/08/2015 ‐ WY 2016 AVAILABLE PERIOD OF RECORD (POR) 10/08/2015 ‐ Current LENGTH OF AVAILABLE POR DATA 4.98 Years | 1,820 Days DATA GAPS IN POR 03/21/2017 – 02/21/2018 (337 Days) STAGE GAGE TYPE Pressure Transducer STAGE GAGE ELEVATION 0.15 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,267.39 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY CREST ELEVATION No spillway TOP OF BASIN ELEVATION 4.5 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 533 Location Map Volume (acre-feet) Paradise Lane at 47th Avenue Basin - water year peaks 10.00 9.00 8.00 7.00 6.00 5.00 4.00 3.00 2.00 1.00 0.00 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 534 2025 WY2020 Events Date of Peak 11/06/2019 11/19/2019 11/20/2019 11/20/2019 11/29/2019 12/07/2019 12/09/2019 12/24/2019 12/27/2019 02/11/2020 02/22/2020 03/12/2020 03/13/2020 03/13/2020 03/18/2020 03/18/2020 08/30/2020 Peak Gage Height (feet) 0.39 0.34 0.52 0.47 0.49 0.37 0.79 0.37 0.34 0.49 0.54 0.62 0.64 0.42 0.34 0.42 0.22 Peak Volume (ac‐ft) 3.7 3.3 4.8 4.4 4.5 3.6 7.3 3.6 3.3 4.5 5.0 5.7 5.9 4.0 3.3 4.0 2.4 Hydrograph of peak WY 2020 impoundment event, 12/09/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 535 Percent Spillway Capacity 8.0 6.6 11.5 10.3 10.8 7.5 17.5 7.5 6.6 10.8 12.0 13.8 14.2 8.9 6.6 8.9 3.3 Paradise Lane at 47th Avenue Basin, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 NOTE: There is currently no discharge rating at this location. FCDMC Annual Surface Water Report, Water Year 2020 Page 536 Paradise Lane at 47th Avenue Basin, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 1 10 11 1 12 1 13 1 14 15 16 17 18 1 19 20 2 21 22 1 23 24 25 26 27 28 29 1 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 5 7 0 5 6 0 0 0 0 2 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 7 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 537 Paradise Lane at 47th Avenue Basin, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 4 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 5 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 6 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 7 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 8 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 9 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 10 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 11 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 12 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 13 0.1 0.1 0.1 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 14 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 15 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 16 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 17 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 18 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 19 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 20 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 21 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 22 0.1 0.1 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 23 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 24 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 25 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 26 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 27 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 28 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 29 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 30 0.1 0.1 0.1 0.1 --0.1 0.1 0.1 0.1 0.1 0.1 0.1 31 0.1 --0.1 0.1 --0.1 --0.1 --0.1 0.1 -------------------------------------------------------------------------------MEAN 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 MAX 0.1 0.5 0.8 0.1 0.5 0.6 0.1 0.1 0.1 0.1 0.2 0.1 MIN 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.10 MAX 0.79 MIN 0.10 FCDMC Annual Surface Water Report, Water Year 2020 Page 538 Pecos Sediment Basin, ID #70007 Site Data LOCATION In Pecos Park near 48th Street and Loop 202 DRAINAGE AREA 5.0 mi2 STREAM TYPE Engineered Drainage System JURISDICTION Phoenix, Arizona WATERSHED South Mountain SECTION/TOWNSHIP/RANGE S32 T1S R4E LATITUDE N 33° 17' 38.3" | +33.29396 LONGITUDE W 111° 58' 39.0" | ‐111.97751 STREAMGAGE INSTALLATION DATE 01/06/2009 ‐ WY 2009 AVAILABLE PERIOD OF RECORD (POR) 01/06/2009 ‐ Current LENGTH OF AVAILABLE POR DATA 11.73 Years | 4,286 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 1.48 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,141.84 feet NAVD88 POINT OF ZERO FLOW (GATED OUTLET) 4.71 feet Gage Height SEDIMENT BASIN WEIR ELEVATION 18.0 feet Gage Height BASIN SPILLWAY CREST ELEVATION 21.0 feet Gage Height TOP OF DAM ELEVATION 22.0 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 539 Location Map Pecos Basin Sediment - water year peaks Volume (acre-feet) 60 50 40 30 20 10 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 540 2020 2025 WY2020 Events Date of Peak 11/22/2019 11/30/2019 12/10/2019 12/29/2019 02/12/2020 02/23/2020 03/13/2020 03/19/2020 Peak Gage Height (feet) 6.32 8.13 4.61 3.92 2.00 8.54 5.95 4.59 Peak Volume (ac‐ft) 12.6 16.9 8.9 7.4 3.6 18.0 11.8 8.9 Hydrograph of peak WY 2020 impoundment event, 11/30/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 541 Percent Spillway Capacity 27.6 36.9 19.4 16.3 7.7 39.2 25.7 19.3 Pecos Sediment Basin, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 11 --2 9 --3 4 --4 5 6 7 8 9 10 11 12 13 1 14 15 16 17 18 19 20 21 2 22 4 9 23 2 18 24 14 25 10 26 5 27 2 28 29 13 30 16 ----31 -----------------------------------------------------------------------------------------TOTAL 0 37 25 0 59 1 0 0 0 0 0 0 MEAN 0 1 1 0 2 0 0 0 0 0 0 0 MAX 0 19 16 0 20 5 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 73 49 0 118 2 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 122 MEAN 0 MAX 20 MIN 0 AC_FT 242 FCDMC Annual Surface Water Report, Water Year 2020 Page 542 Pecos Sediment Basin, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 14 --7 2 13 --6 3 12 --5 4 10 3 5 9 1 2 6 8 1 7 8 8 7 9 7 10 8 11 7 4 12 6 8 13 5 11 14 4 10 15 4 9 16 4 8 17 4 7 18 4 7 19 4 8 20 5 4 7 21 11 4 6 22 12 4 10 5 23 11 4 17 3 24 10 4 15 1 25 10 5 13 26 9 5 12 27 8 6 11 28 7 7 9 29 14 7 8 30 15 7 ----31 -----------------------------------------------------------------------------------------MEAN 0 4 6 0 4 4 0 0 0 0 0 0 MAX 0 17 15 0 18 12 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 1 MAX 18 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 543 Pecos Sediment Basin, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 1.5 1.5 6.8 1.5 --3.7 1.5 1.5 1.5 1.5 1.5 1.5 2 1.5 1.5 6.4 1.5 --3.3 1.5 1.5 1.5 1.5 1.5 1.5 3 1.5 1.5 6.0 1.5 --2.7 1.5 1.5 1.5 1.5 1.5 1.5 4 1.5 1.5 5.2 1.5 1.5 2.2 1.5 1.5 1.5 1.5 1.5 1.5 5 1.5 1.5 4.7 1.5 1.6 1.8 1.5 1.5 1.5 1.5 1.5 1.5 6 1.5 1.5 4.4 1.5 1.6 1.5 1.5 1.5 1.5 1.5 1.5 1.5 7 1.5 1.5 4.0 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 8 1.5 1.5 3.9 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 9 1.5 1.5 3.7 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 10 1.5 1.5 4.1 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 11 1.5 1.5 3.6 1.5 1.5 2.6 1.5 1.5 1.5 1.5 1.5 1.5 12 1.5 1.5 3.2 1.5 1.5 4.3 1.5 1.5 1.5 1.5 1.5 1.5 13 1.5 1.5 2.8 1.5 1.5 5.5 1.5 1.5 1.5 1.5 1.5 1.5 14 1.5 1.5 2.3 1.5 1.5 5.0 1.5 1.5 1.5 1.5 1.5 1.5 15 1.5 1.5 2.2 1.5 1.5 4.5 1.5 1.5 1.5 1.5 1.5 1.5 16 1.5 1.5 2.3 1.5 1.5 4.0 1.5 1.5 1.5 1.5 1.5 1.5 17 1.5 1.5 2.4 1.5 1.5 3.6 1.5 1.5 1.5 1.5 1.5 1.5 18 1.5 1.5 2.4 1.5 1.5 3.7 1.5 1.5 1.5 1.5 1.5 1.5 19 1.5 1.5 2.4 1.5 1.5 4.2 1.5 1.5 1.5 1.5 1.5 1.5 20 1.5 3.3 2.4 1.5 1.5 3.6 1.5 1.5 1.5 1.5 1.5 1.5 21 1.5 5.4 2.3 1.5 1.5 3.0 1.5 1.5 1.5 1.5 1.5 1.5 22 1.5 5.9 2.3 1.5 5.2 2.5 1.5 1.5 1.5 1.5 1.5 1.5 23 1.5 5.5 2.4 1.5 7.9 2.0 1.5 1.5 1.5 1.5 1.5 1.5 24 1.5 5.1 2.4 1.5 7.3 1.7 1.5 1.5 1.5 1.5 1.5 1.5 25 1.5 4.9 2.5 1.5 6.6 1.5 1.5 1.5 1.5 1.5 1.5 1.5 26 1.5 4.5 2.5 1.5 6.0 1.5 1.5 1.5 1.5 1.5 1.5 1.5 27 1.5 4.3 3.2 1.5 5.4 1.5 1.5 1.5 1.5 1.5 1.5 1.5 28 1.5 3.8 3.5 1.5 4.8 1.5 1.5 1.5 1.5 1.5 1.5 1.5 29 1.5 6.8 3.5 1.5 4.2 1.5 1.5 1.5 1.5 1.5 1.5 1.5 30 1.5 7.5 3.6 ----1.5 1.5 1.5 1.5 1.5 1.5 1.5 31 1.5 --1.5 ----1.5 --1.5 --1.5 1.5 -------------------------------------------------------------------------------MEAN 1.5 2.8 3.4 1.5 2.9 2.6 1.5 1.5 1.5 1.5 1.5 1.5 MAX 1.5 8.1 7.5 1.5 8.5 6.0 1.5 1.5 1.5 1.5 1.5 1.5 MIN 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 -----------------------------------------------------------------------------WTR YR 2020 MEAN 1.95 MAX 8.54 MIN 1.48 FCDMC Annual Surface Water Report, Water Year 2020 Page 544 Pecos Basin Pool, ID #70017 Site Data LOCATION In Pecos Park near 48th Street and Loop 202 DRAINAGE AREA 5.0 mi2 STREAM TYPE Engineered Drainage System JURISDICTION Phoenix, Arizona WATERSHED South Mountain SECTION/TOWNSHIP/RANGE S32 T1S R4E LATITUDE N 33° 17' 38.3" | +33.29369 LONGITUDE W 111° 58' 39.0" | ‐111.97751 STREAMGAGE INSTALLATION DATE 01/06/2009 ‐ WY 2009 AVAILABLE PERIOD OF RECORD (POR) 01/06/2009 ‐ Current LENGTH OF AVAILABLE POR DATA 11.73 Years | 4,286 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 6.05 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,141.84 feet NAVD88 PZF (GATED OUTLET, ABOUT 1600 FT DS) 1.75 feet Gage Height SPILLWAY CREST ELEVATION 21.0 feet Gage Height TOP OF DAM ELEVATION 22.0 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 545 Location Map Volume (acre-feet) Pecos Basin Pool - water year peaks 200 180 160 140 120 100 80 60 40 20 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 546 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Volume (ac‐ft) None Hydrograph of peak WY 2020 impoundment event, No impoundments recorded in Water Year 2020. FCDMC Annual Surface Water Report, Water Year 2020 Page 547 Percent Spillway Capacity Pecos Basin Pool, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 548 Pecos Basin Pool, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 0 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 549 Pecos Basin Pool, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 2 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 3 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 4 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 5 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 7 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 8 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 9 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 10 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 11 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 12 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 13 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 14 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 15 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 16 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 17 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 18 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 19 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 20 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 21 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 22 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 23 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 24 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 25 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 26 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 27 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 28 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 29 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 30 6.0 6.0 6.0 6.0 --6.0 6.0 6.0 6.0 6.0 6.0 6.0 31 6.0 --6.0 6.0 --6.0 --6.0 --6.0 6.0 -------------------------------------------------------------------------------MEAN 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 MAX 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 MIN 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 6.05 MAX 6.05 MIN 6.05 FCDMC Annual Surface Water Report, Water Year 2020 Page 550 Pecos North Inflow, ID #69307 Site Data LOCATION Located on 48th Street south of Frye Road DRAINAGE AREA Not Determined STREAM TYPE Engineered Channel JURISDICTION Phoenix, Arizona WATERSHED South Mountain SECTION/TOWNSHIP/RANGE S31 T1S R4E LATITUDE N 33° 17' 49.0" | +33.29695 LONGITUDE W 111° 58' 49.8" | ‐111.98051 STREAMGAGE INSTALLATION DATE 01/21/2009 ‐ WY 2009 AVAILABLE PERIOD OF RECORD (POR) 01/21/2009 ‐ Current LENGTH OF AVAILABLE POR DATA 11.69 Years | 4,271 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.10 feet Gage Height STAFF GAGES None CREST STAGE GAGES None ZERO GAGE HEIGHT ELEVATION 1,173.24 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 277 cfs | 3.12 feet Gage Height | 09/08/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 551 Location Map (watershed not defined) Pecos Inflow North - water year peaks 300 Discharge (cfs) 250 200 150 100 50 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 552 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/29/2019 08/20/2020 Peak Gage Height 0.72 0.72 0.30 Peak Discharge (cfs) 42 42 14 Hydrograph of peak WY 2020 flow event, 11/29/2019 Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 553 Pecos North Inflow, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 1 14 15 16 17 18 19 20 2 21 22 23 24 25 26 27 28 29 7 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 8 0 0 0 2 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 42 0 0 0 19 0 0 0 0 14 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 17 0 0 0 3 0 0 0 0 1 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 10 MEAN 0 MAX 42 MIN 0 AC_FT 20 FCDMC Annual Surface Water Report, Water Year 2020 Page 554 Pecos East Inflow, ID #69507 Site Data LOCATION Located east of 48th Street on the north side of SR 202L DRAINAGE AREA Not Determined STREAM TYPE Engineered Channel JURISDICTION Phoenix, Arizona WATERSHED South Mountain SECTION/TOWNSHIP/RANGE S32 T1S R4E LATITUDE N 33° 17' 47.9" | +33.29663 LONGITUDE W 111° 58' 41.5" | ‐111.97820 STREAMGAGE INSTALLATION DATE 01/21/2009 ‐ WY 2009 AVAILABLE PERIOD OF RECORD (POR) 01/21/2009 ‐ Current LENGTH OF AVAILABLE POR DATA 11.69 Years | 4,271 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.73 feet Gage Height STAFF GAGES None CREST STAGE GAGES None ZERO GAGE HEIGHT ELEVATION 1,165.69 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 186 cfs | 1.86 feet gage height | 09/08/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 555 Location Map Discharge (cfs) Pecos Inflow East - water year peaks 200 180 160 140 120 100 80 60 40 20 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 556 2020 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No runoff recorded in Water Year 2020. Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 557 Pecos East Inflow, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 7 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 7 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 28 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 14 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 7 MEAN 0 MAX 28 MIN 0 AC_FT 14 FCDMC Annual Surface Water Report, Water Year 2020 Page 558 Pecos West Inflow, ID #69807 Site Data LOCATION Located west of 48th Street and north of SR 202L DRAINAGE AREA Not Determined STREAM TYPE Engineered Channel JURISDICTION Phoenix, Arizona WATERSHED South Mountain SECTION/TOWNSHIP/RANGE S31 T1S R4E LATITUDE N 33° 17' 39.3" | +33.29425 LONGITUDE W 111° 58' 58.7" | ‐111.98298 STREAMGAGE INSTALLATION DATE 01/21/2009 ‐ WY 2009 AVAILABLE PERIOD OF RECORD (POR) 01/21/2009 ‐ Current LENGTH OF AVAILABLE POR DATA 11.69 Years | 4,271 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.75 feet Gage Height STAFF GAGES None CREST STAGE GAGES None ZERO GAGE HEIGHT ELEVATION 1,163.24 feet NAVD88 POINT OF ZERO FLOW 0.05 feet Gage Height EXTREME FOR PERIOD OF RECORD 158 cfs | 2.60 feet Gage Height | 09/08/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 559 Location Map Pecos Inflow West - water year peaks 180 Discharge (cfs) 160 140 120 100 80 60 40 20 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 560 2020 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No runoff recorded in Water Year 2020. Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 561 Pecos West Inflow, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 562 Phoenix Dam #2A, ID #8907 Site Data LOCATION On 7th Street south of Thunderbird Road DRAINAGE AREA 0.75 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Phoenix, Arizona WATERSHED Upper ACDC SECTION/TOWNSHIP/RANGE S16 T3N R3E LATITUDE N 33° 36' 13.2" | +33.60366 LONGITUDE W 112° 03' 52.8" | ‐112.06466 STREAMGAGE INSTALLATION DATE 06/29/2009 ‐ WY 2009 AVAILABLE PERIOD OF RECORD (POR) 06/29/2009 ‐ Current LENGTH OF AVAILABLE POR DATA 11.26 Years | 4,112 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.00 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,393.62 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY ELEVATION 16.5 feet Gage Height TOP OF DAM ELEVATION 22.5 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 563 Watershed Map Phoenix Dam #2a - water year peaks Volume (acre-feet) 25 20 15 10 5 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 564 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/20/2019 11/29/2019 12/27/2019 02/11/2020 02/22/2020 03/12/2020 03/12/2020 03/13/2020 03/13/2020 Peak Gage Height (feet) 0.74 1.42 5.28 0.34 0.37 0.84 1.71 4.11 0.94 8.32 Peak Volume (ac‐ft) 1.6 3.1 7.9 0.7 0.8 1.8 3.5 6.3 2.1 12.1 Hydrograph of peak WY 2020 impoundment event, 03/13/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 565 Percent Spillway Capacity 2.8 5.2 13.2 1.3 1.4 3.1 5.9 10.6 3.5 20.3 Phoenix Dam #2A, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 1 13 3 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 1 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 2 0 0 0 4 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 21 1 0 2 26 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 3 0 0 0 8 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 6 MEAN 0 MAX 26 MIN 0 AC_FT 12 FCDMC Annual Surface Water Report, Water Year 2020 Page 566 Phoenix Dam #2A, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 2 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 1 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 8 1 0 2 12 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 12 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 567 Phoenix Dam #2A, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 8 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 9 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 10 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 11 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 12 0.0 0.0 0.0 0.0 0.0 0.2 0.0 0.0 0.0 0.0 0.0 0.0 13 0.0 0.0 0.0 0.0 0.0 1.0 0.0 0.0 0.0 0.0 0.0 0.0 14 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 15 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 16 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 17 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 18 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 19 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 20 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 21 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 22 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 23 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 24 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 25 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 26 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 27 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 28 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 29 0.0 0.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 30 0.0 0.0 0.0 0.0 --0.0 0.0 0.0 0.0 0.0 0.0 0.0 31 0.0 --0.0 0.0 --0.0 --0.0 --0.0 0.0 -------------------------------------------------------------------------------MEAN 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 MAX 0.0 5.3 0.3 0.0 0.8 8.3 0.0 0.0 0.0 0.0 0.0 0.0 MIN 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.00 MAX 8.32 MIN 0.00 FCDMC Annual Surface Water Report, Water Year 2020 Page 568 Phoenix Dam #2B, ID #9907 Site Data LOCATION On Thunderbird Road east of 7th Street DRAINAGE AREA 0.60 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Phoenix, Arizona WATERSHED Upper ACDC SECTION/TOWNSHIP/RANGE S16 T3N R3E LATITUDE N 33° 36' 23.8" | +33.60660 LONGITUDE W 112° 03' 28.4" | ‐112.05789 STREAMGAGE INSTALLATION DATE 06/30/2009 ‐ WY 2009 AVAILABLE PERIOD OF RECORD (POR) 06/30/2009 ‐ Current LENGTH OF AVAILABLE POR DATA 11.26 Years | 4,111 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.00 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,398.20 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY ELEVATION 16.0 feet Gage Height TOP OF DAM ELEVATION 22.0 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 569 Watershed Map Phoenix Dam #2b - water year peaks Volume (acre-feet) 14 12 10 8 6 4 2 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 570 2020 2025 WY2020 Events Date of Peak 11/29/2019 02/22/2020 03/12/2020 03/13/2020 03/13/2020 Peak Gage Height (feet) 0.61 0.38 1.06 1.33 4.32 Peak Volume (ac‐ft) 0.1 0.0 0.1 0.3 2.2 Hydrograph of peak WY 2020 impoundment event, 03/13/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 571 Percent Spillway Capacity 0.0 0.0 0.3 0.7 4.5 Phoenix Dam #2B, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 1 13 3 14 15 16 17 18 19 20 21 --22 23 24 25 26 27 28 29 30 --31 -----------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 4 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 5 0 0 3 19 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 1 0 0 1 8 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 5 MEAN 0 MAX 19 MIN 0 AC_FT 10 FCDMC Annual Surface Water Report, Water Year 2020 Page 572 Phoenix Dam #2B, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 --22 23 24 25 26 27 28 29 30 --31 -----------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 2 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 2 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 573 Phoenix Dam #2B, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 8 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 9 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 10 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 11 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 12 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 13 0.0 0.0 0.0 0.0 0.0 0.7 0.0 0.0 0.0 0.0 0.0 0.0 14 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 15 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 16 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 17 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 18 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 19 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 20 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 21 0.0 --0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 22 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 23 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 24 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 25 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 26 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 27 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 28 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 29 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 30 0.0 0.0 0.0 0.0 --0.0 0.0 0.0 0.0 0.0 0.0 0.0 31 0.0 --0.0 0.0 --0.0 --0.0 ----0.0 -------------------------------------------------------------------------------MEAN 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 MAX 0.0 0.6 0.0 0.0 0.4 4.3 0.0 0.0 0.0 0.0 0.0 0.0 MIN 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.00 MAX 4.32 MIN 0.00 FCDMC Annual Surface Water Report, Water Year 2020 Page 574 Phoenix Dam #3, ID #11507 Site Data LOCATION In the Sunnyslope area of Phoenix, east of Cave Creek Road DRAINAGE AREA 0.5 mi2 STREAM TYPE Dam of Natural Drainage JURISDICTION Phoenix, Arizona WATERSHED Upper ACDC SECTION/TOWNSHIP/RANGE S22 T3N R3E LATITUDE N 33° 35' 11.6" | +33.58656 LONGITUDE W 112° 02' 48.4" | ‐112.04678 STREAMGAGE INSTALLATION DATE 12/18/2001 ‐ WY 2002 AVAILABLE PERIOD OF RECORD (POR) 12/18/2001 ‐ Current LENGTH OF AVAILABLE POR DATA 18.79 Years | 6,862 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.65 feet Gage Height STAFF GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,358.00 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY ELEVATION 24.0 feet Gage Height TOP OF DAM ELEVATION 30.0 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 575 Watershed Map Phoenix Dam #3 - water year peaks Volume (acre-feet) 25 20 15 10 5 0 2000 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 576 2020 2025 WY2020 Events Date of Peak 03/12/2020 03/13/2020 03/13/2020 Peak Gage Height (feet) 3.54 3.74 9.27 Peak Volume (ac‐ft) 0.9 0.9 5.0 Hydrograph of peak WY 2020 impoundment event, 03/13/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 577 Percent Spillway Capacity 1.4 1.4 8.6 Phoenix Dam #3, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 1 13 9 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 9 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 50 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 19 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 9 MEAN 0 MAX 50 MIN 0 AC_FT 19 FCDMC Annual Surface Water Report, Water Year 2020 Page 578 Phoenix Dam #3, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 1 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 5 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 5 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 579 Phoenix Dam #3, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 2 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 3 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 4 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 5 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 6 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 8 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 9 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 10 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 11 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 12 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 13 0.7 0.7 0.7 0.7 0.7 2.0 0.7 0.7 0.7 0.7 0.7 0.7 14 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 15 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 16 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 17 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 18 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 19 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 20 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 21 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 22 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 23 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 24 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 25 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 26 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 27 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 28 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 29 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 30 0.7 0.7 0.7 0.7 --0.7 0.7 0.7 0.7 0.7 0.7 0.7 31 0.7 --0.7 0.7 --0.7 --0.7 --0.7 0.7 -------------------------------------------------------------------------------MEAN 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 MAX 0.7 0.7 0.7 0.7 0.7 9.3 0.7 0.7 0.7 0.8 0.7 0.7 MIN 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.65 MAX 9.27 MIN 0.65 FCDMC Annual Surface Water Report, Water Year 2020 Page 580 Phoenix Dam #4, ID #12207 Site Data LOCATION East of 18th Street north of Northern Avenue DRAINAGE AREA 0.60 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Phoenix, Arizona WATERSHED Upper ACDC SECTION/TOWNSHIP/RANGE S34 T3N R3E LATITUDE N 33° 33' 30.9" | +33.55857 LONGITUDE W 112° 02' 33.8" | ‐112.04272 STREAMGAGE INSTALLATION DATE 07/06/2009 ‐ WY 2009 AVAILABLE PERIOD OF RECORD (POR) 07/06/2009 ‐ Current LENGTH OF AVAILABLE POR DATA 11.24 Years | 4,105 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.00 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,319.28 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY ELEVATION 15.0 feet Gage Height TOP OF DAM ELEVATION 21.0 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 581 Watershed Map Phoenix Dam #4 - water year peaks Volume (acre-feet) 25 20 15 10 5 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 582 2020 2025 WY2020 Events Date of Peak 11/29/2019 03/12/2020 03/13/2020 03/13/2020 Peak Gage Height (feet) 1.17 5.40 4.76 3.68 Peak Volume (ac‐ft) 0.2 3.0 2.3 1.4 Hydrograph of peak WY 2020 impoundment event, 03/12/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 583 Percent Spillway Capacity 0.36 7.1 5.5 3.3 Phoenix Dam #4, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 2 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 2 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 9 0 0 0 20 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 4 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 2 MEAN 0 MAX 20 MIN 0 AC_FT 4 FCDMC Annual Surface Water Report, Water Year 2020 Page 584 Phoenix Dam #4, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 3 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 3 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 585 Phoenix Dam #4, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 4 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 5 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 6 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 7 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 8 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 9 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 10 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 11 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 12 0.1 0.1 0.1 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 13 0.1 0.1 0.1 0.1 0.1 0.4 0.1 0.1 0.1 0.1 0.1 0.1 14 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 15 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 16 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 17 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 18 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 19 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 20 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 21 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 22 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 23 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 24 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 25 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 26 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 27 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 28 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 29 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 30 0.1 0.1 0.1 0.1 --0.1 0.1 0.1 0.1 0.1 0.1 0.1 31 0.1 --0.1 0.1 --0.1 --0.1 --0.1 0.1 -------------------------------------------------------------------------------MEAN 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 MAX 0.1 1.2 0.1 0.1 0.1 5.4 0.1 0.1 0.1 0.1 0.1 0.1 MIN 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.10 MAX 5.40 MIN 0.10 FCDMC Annual Surface Water Report, Water Year 2020 Page 586 Phoenix Dam #7, ID #13307 Site Data LOCATION Located on the north side of North Mountain DRAINAGE AREA 0.60 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Phoenix, Arizona WATERSHED Upper ACDC SECTION/TOWNSHIP/RANGE S17 T3N R3E LATITUDE N 33° 36' 04.4" | +33.60123 LONGITUDE W 112° 04' 21.5" | ‐112.07264 STREAMGAGE INSTALLATION DATE 12/19/2001 ‐ WY 2002 AVAILABLE PERIOD OF RECORD (POR) 12/19/2001 ‐ Current LENGTH OF AVAILABLE POR DATA 18.78 Years | 6,861 Days DATA GAPS IN POR 01/30/2009 ‐‐ 05/11/2009 STAGE GAGE ELEVATION 0.12 feet Gage Height STAFF GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,371.34 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY ELEVATION 22.4 feet Gage Height TOP OF DAM ELEVATION 29.0 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 587 Watershed Map Phoenix Dam #7 - water year peaks Volume (acre-feet) 25 20 15 10 5 0 2000 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 588 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/29/2019 02/22/2020 03/12/2020 03/13/2020 03/13/2020 Peak Gage Height (feet) 4.28 7.67 0.69 4.75 1.04 8.02 Peak Volume (ac‐ft) 1.2 4.1 0.2 1.5 0.3 4.5 Hydrograph of peak WY 2020 impoundment event, 03/13/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 589 Percent Spillway Capacity 1.0 3.5 0.0 1.3 0.0 3.7 Phoenix Dam #7, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 1 13 5 14 15 16 17 18 19 20 1 21 22 23 24 25 26 27 28 29 4 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 5 0 0 0 6 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 46 0 0 3 46 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 11 0 0 0 11 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 11 MEAN 0 MAX 46 MIN 0 AC_FT 22 FCDMC Annual Surface Water Report, Water Year 2020 Page 590 Phoenix Dam #7, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 4 0 0 0 5 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 5 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 591 Phoenix Dam #7, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 5 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 6 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 7 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 8 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 9 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 10 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 11 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 12 0.2 0.2 0.2 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 13 0.2 0.2 0.2 0.2 0.2 0.9 0.2 0.2 0.2 0.2 0.2 0.2 14 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 15 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 16 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 17 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 18 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 19 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 20 0.2 0.4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 21 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 22 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 23 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 24 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 25 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 26 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 27 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 28 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 29 0.2 0.8 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 30 0.2 0.2 0.2 0.2 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 31 0.2 --0.2 0.2 --0.2 --0.2 --0.2 0.2 -------------------------------------------------------------------------------MEAN 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 MAX 0.2 7.7 0.2 0.2 0.7 8.0 0.2 0.2 0.2 0.2 0.2 0.2 MIN 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.17 MAX 8.02 MIN 0.17 FCDMC Annual Surface Water Report, Water Year 2020 Page 592 Phoenix Dam #99, ID #12707 Site Data LOCATION Near SR 51 and 32nd Street DRAINAGE AREA 0.13 mi2 STREAM TYPE Dam of natural and local drainage JURISDICTION Phoenix, Arizona WATERSHED Upper ACDC SECTION/TOWNSHIP/RANGE S26 T3N R3E LATITUDE N 33° 34' 29.1" | +33.57476 LONGITUDE W 112° 00' 51.4" | ‐112.01428 STREAMGAGE INSTALLATION DATE 07/07/2009 ‐ WY 2009 AVAILABLE PERIOD OF RECORD (POR) 07/07/2009 ‐ Current LENGTH OF AVAILABLE POR DATA 11.24 Years | 4,104 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.00 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,441.71 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY ELEVATION 19.8 feet Gage Height TOP OF DAM ELEVATION 24.3 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 593 Watershed Map Phoenix Dam #99 - water year peaks 9 Impoundments occur in this dam above 9.0 feet stage. There have been no events exceeding that criteria since installation. 8 Stage (feet) 7 6 5 4 3 2 1 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 594 2020 2025 WY2020 Events Date of Peak 11/29/2019 12/09/2019 12/24/2019 12/25/2019 02/11/2020 02/22/2020 03/11/2020 03/12/2020 03/13/2020 03/13/2020 07/24/2020 08/20/2020 Peak Gage Height (feet) 0.54 1.07 0.59 0.39 0.24 0.47 0.32 1.35 0.59 0.79 1.12 0.87 Peak Volume (ac‐ft) 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Hydrograph of peak WY 2020 impoundment event, 03/12/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 595 Percent Spillway Capacity 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Phoenix Dam #99, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 2 4 0 2 5 0 0 0 4 3 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 1 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 1 MEAN 0 MAX 5 MIN 0 AC_FT 2 FCDMC Annual Surface Water Report, Water Year 2020 Page 596 Phoenix Dam #99, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 0 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 597 Phoenix Dam #99, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 8 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 9 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 10 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 11 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 12 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 13 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 14 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 15 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 16 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 17 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 18 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 19 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 20 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 21 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 22 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 23 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 24 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 25 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 26 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 27 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 28 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 29 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 30 0.0 0.0 0.0 0.0 --0.0 0.0 0.0 0.0 0.0 0.0 0.0 31 0.0 --0.0 0.0 --0.0 --0.0 --0.0 0.0 -------------------------------------------------------------------------------MEAN 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 MAX 0.0 0.5 1.1 0.0 0.5 1.3 0.0 0.0 0.0 1.1 0.9 0.0 MIN 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.00 MAX 1.35 MIN 0.00 FCDMC Annual Surface Water Report, Water Year 2020 Page 598 Phoenix East Park Dam, ID #13007 Site Data LOCATION Near Peoria and Seventh Avenues DRAINAGE AREA 0.11 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Phoenix, Arizona WATERSHED Upper ACDC SECTION/TOWNSHIP/RANGE S29 T3N R3E LATITUDE N 33° 34' 45.2" | +33.57923 LONGITUDE W 112° 04' 36.3" | ‐112.07676 STREAMGAGE INSTALLATION DATE 11/28/2001 ‐ WY 2002 AVAILABLE PERIOD OF RECORD (POR) 11/28/2001 ‐ Current LENGTH OF AVAILABLE POR DATA 18.84 Years | 6,882 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.10 feet Gage Height STAFF GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,350.17 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY ELEVATION 19.8 feet Gage Height TOP OF DAM ELEVATION 24.8 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 599 Watershed Map Volume (acre-feet) Phoenix East Park Dam - water year peaks 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 2000 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 600 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/29/2019 03/12/2020 03/12/2020 03/13/2020 Peak Gage Height (feet) 0.45 2.16 1.39 1.52 3.93 Peak Volume (ac‐ft) 0.2 0.8 0.5 0.6 1.3 Hydrograph of peak WY 2020 impoundment event, 03/13/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 601 Percent Spillway Capacity 1.0 3.8 2.7 2.9 6.2 Phoenix East Park Dam, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 2 13 2 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 1 30 --31 ---------------------------------------------------------------------------------------TOTAL 11 10 11 11 10 14 8 3 9 10 11 10 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 17 0 0 0 31 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 21 21 21 21 20 28 17 6 19 21 21 20 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 118 MEAN 0 MAX 31 MIN 0 AC_FT 234 FCDMC Annual Surface Water Report, Water Year 2020 Page 602 Phoenix East Park Dam, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 1 0 0 0 1 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 1 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 603 Phoenix East Park Dam, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 4 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 5 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 6 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 7 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 8 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 9 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 10 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 11 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 12 0.1 0.1 0.1 0.1 0.1 0.5 0.1 0.1 0.1 0.1 0.1 0.1 13 0.1 0.1 0.1 0.1 0.1 0.4 0.1 0.1 0.1 0.1 0.1 0.1 14 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 15 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 16 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 17 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 18 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 19 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 20 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 21 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 22 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 23 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 24 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 25 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 26 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 27 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 28 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 29 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 30 0.1 0.1 0.1 0.1 --0.1 0.1 0.1 0.1 0.1 0.1 0.1 31 0.1 --0.1 0.1 --0.1 --0.1 --0.1 0.1 -------------------------------------------------------------------------------MEAN 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 MAX 0.1 2.2 0.1 0.1 0.1 3.9 0.1 0.1 0.1 0.1 0.1 0.1 MIN 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.10 MAX 3.93 MIN 0.10 FCDMC Annual Surface Water Report, Water Year 2020 Page 604 Phoenix West Park Dam, ID #13507 Site Data LOCATION Near Peoria and Seventh Avenues DRAINAGE AREA 0.62 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Phoenix, Arizona WATERSHED Upper ACDC SECTION/TOWNSHIP/RANGE S22 T3N R3E LATITUDE N 33° 35' 02.8" | +33.58412 LONGITUDE W 112° 04' 55.0" | ‐112.08195 STREAMGAGE INSTALLATION DATE 11/29/2001 ‐ WY 2002 AVAILABLE PERIOD OF RECORD (POR) 11/29/2001 ‐ Current LENGTH OF AVAILABLE POR DATA 18.84 Years | 6,881 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.20 feet Gage Height STAFF GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,315.72 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY ELEVATION 24.0 feet Gage Height TOP OF DAM ELEVATION 30.0 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 605 Watershed Map Volume (acre-feet) Phoenix West Park Dam - water year peaks 20 18 16 14 12 10 8 6 4 2 0 2000 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 606 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/29/2019 03/12/2020 03/12/2020 03/13/2020 Peak Gage Height (feet) 3.27 6.83 4.96 3.88 6.73 Peak Volume (ac‐ft) 4.9 10.3 7.5 5.8 10.1 Hydrograph of peak WY 2020 impoundment event, 11/29/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 607 Percent Spillway Capacity 4.4 9.1 6.6 5.2 9.0 Phoenix West Park Dam, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 2 13 5 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 5 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 5 0 0 0 6 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 45 0 0 0 45 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 10 0 0 0 13 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 12 MEAN 0 MAX 45 MIN 0 AC_FT 23 FCDMC Annual Surface Water Report, Water Year 2020 Page 608 Phoenix West Park Dam, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 1 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 1 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 10 0 0 0 10 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 10 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 609 Phoenix West Park Dam, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 5 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 6 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 7 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 8 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 9 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 10 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 11 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 12 0.2 0.2 0.2 0.2 0.2 0.5 0.2 0.2 0.2 0.2 0.2 0.2 13 0.2 0.2 0.2 0.2 0.2 0.8 0.2 0.2 0.2 0.2 0.2 0.2 14 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 15 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 16 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 17 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 18 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 19 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 20 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 21 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 22 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 23 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 24 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 25 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 26 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 27 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 28 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 29 0.2 0.9 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 30 0.2 0.2 0.2 0.2 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 31 0.2 --0.2 0.2 --0.2 --0.2 --0.2 0.2 -------------------------------------------------------------------------------MEAN 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 MAX 0.2 6.8 0.2 0.2 0.2 6.7 0.2 0.2 0.2 0.2 0.2 0.2 MIN 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.20 MAX 6.83 MIN 0.20 FCDMC Annual Surface Water Report, Water Year 2020 Page 610 Phoenix Zoo Dam #3, ID #4307 Site Data LOCATION Located in Papago Park on the north side of the Phoenix Zoo property. DRAINAGE AREA 0.07 mi2 STREAM TYPE Dam with permanent lake JURISDICTION Phoenix, Arizona WATERSHED Lower ACDC SECTION/TOWNSHIP/RANGE S04 T1N R4E LATITUDE N 33° 27' 10.1" | +33.45281 LONGITUDE W 111° 56' 53.1" | ‐111.94808 STREAMGAGE INSTALLATION DATE 04/25/2016 ‐ WY 2016 AVAILABLE PERIOD OF RECORD (POR) 04/25/2016 ‐ Current LENGTH OF AVAILABLE POR DATA 4.44 Years | 1,620 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 8.90 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,230.16 feet NAVD88 POINT OF ZERO FLOW 9.0 feet Gage Height SPILLWAY CREST ELEVATION 12.80 feet Gage Height TOP OF BASIN ELEVATION 13.40 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 611 Location Map Volume (acre-feet) Phoenix Zoo Dam #3 - water year peaks 13.2 13.1 13 12.9 12.8 12.7 12.6 12.5 12.4 12.3 12.2 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 612 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Volume (ac‐ft) Percent Spillway Capacity 02/17/2020 10.74 13.1 98.8 Hydrograph of peak WY 2020 impoundment, 02/17/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 613 Phoenix Zoo Dam #3, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 --30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 614 Phoenix Zoo Dam #3, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 13 13 13 13 13 13 12 13 12 13 12 13 2 13 13 13 13 13 13 12 12 12 13 12 13 3 13 13 13 13 13 13 12 12 12 12 12 13 4 13 13 13 13 13 13 12 13 12 12 12 13 5 13 13 13 13 13 13 12 13 12 12 13 13 6 13 13 13 13 13 13 12 13 13 12 13 13 7 13 13 13 13 13 13 12 13 13 13 13 13 8 13 13 13 13 13 13 12 13 13 13 13 13 9 13 13 13 13 13 13 13 13 13 13 13 12 10 13 13 13 13 13 13 13 13 13 13 13 12 11 13 13 13 13 13 13 13 13 13 12 13 12 12 13 13 13 13 13 13 13 13 12 12 12 12 13 13 13 13 13 13 13 13 13 13 12 12 12 14 12 13 13 13 13 13 13 13 13 12 12 13 15 12 13 13 13 13 13 13 13 13 12 12 12 16 12 13 13 13 13 13 13 13 13 13 12 12 17 12 13 13 13 13 13 13 13 13 12 12 13 18 12 13 13 13 13 13 13 13 13 12 12 13 19 12 13 13 13 13 13 13 13 13 12 12 13 20 12 13 13 13 13 13 13 13 13 12 12 13 21 12 13 13 13 13 13 13 13 12 12 12 13 22 12 13 13 13 13 13 13 13 12 12 12 13 23 12 13 13 13 13 13 12 13 12 13 12 13 24 12 13 13 13 13 13 12 13 12 13 12 13 25 12 13 13 13 13 13 13 13 13 13 13 13 26 13 13 13 13 13 13 13 13 13 13 13 12 27 13 13 13 13 13 13 13 13 13 13 13 12 28 13 13 13 13 13 13 13 12 13 13 13 12 29 13 13 13 13 13 13 13 12 13 13 13 12 30 13 13 13 13 --12 13 12 13 13 13 13 31 13 --13 13 --13 --12 --13 13 -------------------------------------------------------------------------------MEAN 13 13 13 13 13 13 13 13 13 12 12 13 MAX 13 13 13 13 13 13 13 13 13 13 13 13 MIN 12 12 12 13 13 12 12 12 12 12 12 12 -----------------------------------------------------------------------------WTR YR 2020 MEAN 13 MAX 13 MIN 12 FCDMC Annual Surface Water Report, Water Year 2020 Page 615 Phoenix Zoo Dam #3, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 9.3 9.5 9.5 9.4 9.9 9.7 9.1 9.1 9.1 9.2 9.1 9.2 2 9.3 9.4 9.3 9.4 9.8 9.7 9.1 9.1 9.1 9.1 9.1 9.2 3 9.3 9.5 9.3 9.6 9.8 9.7 9.1 9.1 9.1 9.0 9.0 9.2 4 9.3 9.5 9.2 9.7 9.9 9.9 9.1 9.1 9.1 9.0 9.0 9.3 5 9.3 9.5 9.2 9.7 9.9 10.1 9.1 9.2 9.1 8.9 9.1 9.3 6 9.3 9.4 9.3 9.7 9.8 10.2 9.1 9.2 9.1 9.0 9.2 9.2 7 9.3 9.3 9.2 9.7 9.7 9.6 9.1 9.2 9.1 9.1 9.3 9.2 8 9.3 9.2 9.3 9.7 9.7 9.3 9.1 9.2 9.1 9.2 9.2 9.2 9 9.3 9.3 9.3 9.7 9.7 9.2 9.1 9.1 9.1 9.2 9.2 9.1 10 9.3 9.4 9.3 9.7 9.7 9.2 9.2 9.2 9.1 9.1 9.2 9.0 11 9.3 9.4 9.3 9.7 9.7 9.3 9.3 9.2 9.1 9.0 9.1 9.0 12 9.2 9.5 9.3 9.8 9.5 9.3 9.3 9.1 9.1 8.9 9.1 9.1 13 9.2 9.5 9.3 9.8 9.4 9.4 9.3 9.2 9.1 8.9 9.1 9.1 14 9.1 9.6 9.3 9.7 9.6 9.3 9.3 9.2 9.1 8.9 9.0 9.1 15 9.0 9.6 9.3 9.8 10.1 9.2 9.3 9.1 9.1 9.0 9.0 9.1 16 9.0 9.6 9.3 10.0 10.5 9.2 9.3 9.1 9.1 9.1 9.0 9.1 17 9.0 9.7 9.3 10.0 10.6 9.2 9.3 9.2 9.1 9.1 8.9 9.1 18 9.0 9.7 9.2 10.0 10.3 9.2 9.3 9.1 9.2 9.0 8.9 9.1 19 9.1 9.7 9.2 10.0 9.7 9.2 9.3 9.2 9.1 9.0 9.0 9.2 20 9.1 9.7 9.2 10.0 9.5 9.2 9.3 9.2 9.1 9.0 8.9 9.2 21 9.1 9.8 9.2 10.0 9.7 9.2 9.2 9.2 9.0 9.0 8.9 9.2 22 9.1 9.7 9.4 10.0 9.6 9.2 9.2 9.2 9.0 9.0 8.9 9.2 23 9.1 9.7 9.6 10.0 9.5 9.1 9.1 9.2 9.0 9.1 8.9 9.1 24 9.1 9.7 9.7 10.0 9.3 9.1 9.1 9.2 9.1 9.2 9.1 9.1 25 9.1 9.7 9.7 10.0 9.3 9.1 9.1 9.1 9.2 9.3 9.4 9.1 26 9.3 9.7 9.7 10.0 9.6 9.1 9.1 9.1 9.2 9.2 9.4 9.1 27 9.3 9.6 9.8 9.9 10.2 9.1 9.2 9.1 9.2 9.2 9.3 9.1 28 9.4 9.5 9.7 9.9 10.3 9.1 9.2 9.1 9.2 9.2 9.2 9.1 29 9.4 9.6 9.6 10.0 9.8 9.1 9.2 9.1 9.2 9.2 9.2 9.1 30 9.5 9.6 9.5 9.9 --9.1 9.2 9.1 9.2 9.2 9.1 9.1 31 9.6 --9.4 9.9 --9.1 --9.1 --9.1 9.2 -------------------------------------------------------------------------------MEAN 9.2 9.6 9.4 9.8 9.8 9.3 9.2 9.1 9.1 9.1 9.1 9.1 MAX 9.7 9.8 9.8 10.2 10.7 10.5 9.5 9.3 9.3 9.4 9.6 9.4 MIN 8.9 9.0 9.0 9.2 9.2 9.0 8.9 8.9 8.9 8.9 8.9 8.9 -----------------------------------------------------------------------------WTR YR 2020 MEAN 9.32 MAX 10.74 MIN 8.90 FCDMC Annual Surface Water Report, Water Year 2020 Page 616 Phoenix Zoo Dam #5, ID #4407 Site Data LOCATION Located within the Phoenix Zoo property at the southwest corner. DRAINAGE AREA 0.32 mi2 STREAM TYPE Dam with permanent lake JURISDICTION Phoenix, Arizona WATERSHED Lower ACDC SECTION/TOWNSHIP/RANGE S09 T1N R4E LATITUDE N 33° 26' 57.1" | +33.44920 LONGITUDE W 111° 57' 04.2" | ‐111.95117 STREAMGAGE INSTALLATION DATE 04/28/2016 ‐ WY 2016 AVAILABLE PERIOD OF RECORD (POR) 04/28/2016 ‐ Current LENGTH OF AVAILABLE POR DATA 4.43 Years | 1,617 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 7.75 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,205.00 feet NAVD88 POINT OF ZERO FLOW Approximately 7.8 feet Gage Height SPILLWAY CREST ELEVATION 8.70 feet Gage Height TOP OF BASIN ELEVATION 9.20 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 617 Location Map Phoenix Zoo Dam #5 - water year peaks Volume (acre-feet) 12 10 8 6 4 2 0 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 618 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Volume (ac‐ft) Percent Spillway Capacity 02/22/2020 8.62 9.4 98.1 Hydrograph of peak WY 2020 impoundment event, 02/22/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 619 Phoenix Zoo Dam #5, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 --30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 620 Phoenix Zoo Dam #5, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 9 9 9 9 9 9 9 9 9 9 9 9 2 9 9 9 9 9 9 9 9 9 9 9 9 3 9 9 9 9 9 9 9 9 9 9 9 9 4 9 9 9 9 9 9 9 9 9 9 9 9 5 9 9 9 9 9 9 9 9 9 9 9 9 6 9 9 9 9 9 9 9 9 9 9 9 9 7 9 9 9 9 9 9 9 9 9 9 9 9 8 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 10 9 9 9 9 9 9 9 9 9 9 9 9 11 9 9 9 9 9 9 9 9 9 9 9 9 12 9 9 9 9 9 9 9 9 9 9 9 9 13 9 9 9 9 9 9 9 9 9 9 9 9 14 9 9 9 9 9 9 9 9 9 9 9 9 15 9 9 9 9 9 9 9 9 9 9 9 9 16 9 9 9 9 9 9 9 9 9 9 9 9 17 9 9 9 9 9 9 9 9 9 9 9 9 18 9 9 9 9 9 9 9 9 9 9 8 9 19 9 9 9 9 9 9 9 9 9 9 9 9 20 9 9 9 9 9 9 9 9 9 9 9 9 21 9 9 9 9 9 9 9 9 9 9 9 9 22 9 9 9 9 9 9 9 9 9 9 9 9 23 9 9 9 9 9 9 9 9 9 9 9 9 24 9 9 9 9 9 9 9 9 9 9 9 9 25 9 9 9 9 9 9 9 9 9 9 9 9 26 9 9 9 9 9 9 9 9 9 9 9 9 27 9 9 9 9 9 9 9 9 9 9 9 9 28 9 9 9 9 9 9 9 9 9 9 9 9 29 9 9 9 9 9 9 9 9 9 9 9 9 30 9 9 9 9 --9 9 9 9 9 9 9 31 9 --9 9 --9 --9 --9 9 -------------------------------------------------------------------------------MEAN 9 9 9 9 9 9 9 9 9 9 9 9 MAX 9 9 9 9 9 9 9 9 9 9 9 9 MIN 9 9 9 9 9 9 9 9 9 9 8 9 -----------------------------------------------------------------------------WTR YR 2020 MEAN 9 MAX 9 MIN 8 FCDMC Annual Surface Water Report, Water Year 2020 Page 621 Phoenix Zoo Dam #5, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 8.4 8.4 8.4 8.4 8.4 8.5 8.5 8.5 8.4 8.5 8.4 8.3 2 8.4 8.4 8.4 8.4 8.4 8.5 8.5 8.5 8.4 8.5 8.4 8.3 3 8.4 8.5 8.4 8.5 8.4 8.5 8.5 8.5 8.4 8.4 8.4 8.4 4 8.4 8.5 8.4 8.5 8.4 8.5 8.6 8.5 8.4 8.4 8.4 8.4 5 8.4 8.5 8.4 8.6 8.4 8.5 8.6 8.5 8.4 8.4 8.4 8.4 6 8.4 8.5 8.4 8.6 8.4 8.6 8.5 8.5 8.5 8.4 8.5 8.3 7 8.4 8.4 8.4 8.5 8.4 8.6 8.5 8.5 8.5 8.3 8.5 8.3 8 8.4 8.4 8.4 8.5 8.4 8.5 8.5 8.5 8.5 8.4 8.5 8.3 9 8.4 8.4 8.4 8.5 8.4 8.5 8.5 8.5 8.5 8.5 8.5 8.3 10 8.4 8.4 8.4 8.6 8.4 8.5 8.5 8.5 8.5 8.4 8.5 8.3 11 8.4 8.5 8.4 8.6 8.5 8.6 8.5 8.5 8.5 8.4 8.4 8.3 12 8.4 8.5 8.4 8.6 8.5 8.5 8.6 8.5 8.5 8.4 8.4 8.3 13 8.4 8.5 8.4 8.6 8.4 8.5 8.6 8.5 8.5 8.4 8.3 8.3 14 8.4 8.5 8.4 8.6 8.4 8.5 8.6 8.5 8.5 8.4 8.2 8.3 15 8.4 8.5 8.4 8.5 8.5 8.5 8.6 8.5 8.5 8.4 8.2 8.3 16 8.4 8.5 8.4 8.4 8.5 8.5 8.6 8.5 8.5 8.4 8.2 8.3 17 8.4 8.5 8.4 8.4 8.5 8.5 8.6 8.5 8.4 8.5 8.1 8.3 18 8.3 8.5 8.4 8.4 8.5 8.5 8.5 8.5 8.4 8.4 8.1 8.3 19 8.3 8.5 8.4 8.4 8.6 8.5 8.5 8.5 8.4 8.4 8.2 8.3 20 8.3 8.5 8.4 8.4 8.5 8.5 8.6 8.5 8.5 8.4 8.3 8.3 21 8.3 8.5 8.4 8.4 8.5 8.5 8.6 8.5 8.5 8.4 8.3 8.3 22 8.3 8.5 8.4 8.4 8.6 8.5 8.6 8.5 8.5 8.4 8.3 8.3 23 8.3 8.5 8.5 8.4 8.5 8.5 8.5 8.5 8.4 8.4 8.3 8.4 24 8.2 8.5 8.5 8.4 8.5 8.5 8.5 8.5 8.4 8.4 8.3 8.3 25 8.2 8.5 8.5 8.4 8.5 8.5 8.5 8.5 8.4 8.5 8.4 8.3 26 8.2 8.5 8.5 8.4 8.5 8.5 8.5 8.5 8.5 8.5 8.4 8.3 27 8.3 8.5 8.5 8.4 8.5 8.5 8.5 8.5 8.5 8.5 8.4 8.3 28 8.4 8.4 8.5 8.4 8.5 8.5 8.6 8.5 8.5 8.5 8.4 8.3 29 8.4 8.5 8.5 8.4 8.6 8.5 8.5 8.5 8.5 8.5 8.3 8.3 30 8.4 8.4 8.5 8.4 --8.5 8.5 8.4 8.5 8.5 8.3 8.3 31 8.5 --8.5 8.4 --8.5 --8.4 --8.5 8.3 -------------------------------------------------------------------------------MEAN 8.4 8.5 8.4 8.5 8.5 8.5 8.5 8.5 8.5 8.4 8.4 8.3 MAX 8.5 8.6 8.5 8.6 8.6 8.6 8.6 8.5 8.5 8.5 8.5 8.4 MIN 8.2 8.4 8.3 8.4 8.3 8.5 8.5 8.4 8.4 8.3 8.1 8.3 -----------------------------------------------------------------------------WTR YR 2020 MEAN 8.44 MAX 8.62 MIN 8.10 FCDMC Annual Surface Water Report, Water Year 2020 Page 622 Picacho Wash, ID #74207 Site Data LOCATION Located near milepost 10 on SR74 DRAINAGE AREA 17.8 mi2 STREAM TYPE Natural Stream JURISDICTION Maricopa County, Arizona WATERSHED Trilby SECTION/TOWNSHIP/RANGE S28 T6N R2W LATITUDE N 33° 50' 08.3" | +33.83563 LONGITUDE W 112° 28' 32.1" | ‐112.47557 ARIZONA STATE PLANE E 530364 | N 1032224 USGS QUAD SHEET Hieroglyphic Mountains SW 7.5‐Minute STREAMGAGE INSTALLATION DATE 04/11/2012 ‐ WY 2012 AVAILABLE PERIOD OF RECORD (POR) 04/11/2012 ‐ Current LENGTH OF AVAILABLE POR DATA 8.47 Years | 3,095 Days DATA GAPS IN POR None STAGE GAGE TYPE Pressure Transducer STAGE GAGE ELEVATION 0.90 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,961.78 feet NAVD88 POINT OF ZERO FLOW 0.1 feet EXTREME FOR PERIOD OF RECORD 2,437 cfs | 4.41 feet | 09/23/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 623 Watershed Map Picacho Wash - water year peaks 3,000 Discharge (cfs) 2,500 2,000 1,500 1,000 500 0 2010 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 624 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No runoff recorded in Water Year 2020. Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 625 Picacho Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 626 Pima Canyon Wash, ID #68707 Site Data LOCATION Located near 48th Street and Guadalupe Road DRAINAGE AREA 1.51 mi2 STREAM TYPE Culvert JURISDICTION Phoenix, Arizona WATERSHED South Mountain SECTION/TOWNSHIP/RANGE S05 T1S R4E LATITUDE N 33° 21' 54.1" | +33.36504 LONGITUDE W 111° 58' 30.4" | ‐111.97512 STREAMGAGE INSTALLATION DATE 04/15/2014 ‐ WY 2014 AVAILABLE PERIOD OF RECORD (POR) 04/15/2014 ‐ Current LENGTH OF AVAILABLE POR DATA 6.46 Years | 2,361 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 1.69 feet Gage Height STAFF GAGES 1 CREST STAGE GAGES None ZERO GAGE HEIGHT ELEVATION 1,302.90 feet NAVD88 POINT OF ZERO FLOW 1.5 feet Gage Height EXTREME FOR PERIOD OF RECORD 345 cfs | 6.52 feet Gage Height | 09/08/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 627 Watershed Map Pima Canyon Wash - water year peaks 400 350 300 250 200 150 100 50 0 2010 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 628 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No runoff recorded in Water Year 2020. Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 629 Pima Canyon Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 --7 8 9 10 11 12 13 14 15 16 --17 --18 --19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 630 Powder House Wash, ID #52507 Site Data LOCATION In Wickenburg, north of Constellation Road DRAINAGE AREA 1.8 mi2 STREAM TYPE Natural Stream JURISDICTION Wickenburg, Arizona WATERSHED Lower Hassayampa SECTION/TOWNSHIP/RANGE S06 T7N R4W LATITUDE N 33° 58' 51.0" | +33.98083 LONGITUDE W 112° 43' 02.3" | ‐112.71732 STREAMGAGE INSTALLATION DATE 05/18/1995 ‐ WY 1995 AVAILABLE PERIOD OF RECORD (POR) 05/18/1995 ‐ Current LENGTH OF AVAILABLE POR DATA 25.37 Years | 9,268 Days DATA GAPS IN POR None STAGE GAGE ELEVATION ‐0.50 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 2 ZERO GAGE HEIGHT ELEVATION 2,133.59 feet NAVD88 POINT OF ZERO FLOW ‐0.6 feet Gage Height EXTREME FOR PERIOD OF RECORD 2,312 cfs | 2.42 feet | 07/18/2015 FCDMC Annual Surface Water Report, Water Year 2020 Page 631 Watershed Map Powder House Wash - water year peaks Discharge (cfs) 2,500 2,000 1,500 1,000 500 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 632 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No runoff recorded during Water Year 2020. Sensor level is above channel bottom, so flow possibly occurred, but missed the sensor. Flood Flow Frequency Flood Flow Frequency N=26, HEC‐WRC computation (based on 26 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 139 649 1,290 2,140 3,580 4,860 NOTE: These results are based on very limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 633 Powder House Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 --6 7 8 9 10 --11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 --27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 NOTE: Elevation of level sensor is about 0.5 feet above channel. FCDMC Annual Surface Water Report, Water Year 2020 Page 634 Powerline Floodway, ID #37507 Site Data LOCATION Located near Ellsworth and Ray Roads DRAINAGE AREA Not Determined STREAM TYPE Engineered Channel JURISDICTION Mesa, Arizona WATERSHED Lower East Maricopa Floodway SECTION/TOWNSHIP/RANGE S28 T1S R7E LATITUDE N 33° 19' 16.4" | +33.32123 LONGITUDE W 111° 38' 09.9" | ‐111.63609 STREAMGAGE INSTALLATION DATE 02/13/2008 ‐ WY 2008 AVAILABLE PERIOD OF RECORD (POR) 02/13/2008 ‐ Current LENGTH OF AVAILABLE POR DATA 12.63 Years | 4,614 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.20 feet Gage Height STAFF GAGES None CREST STAGE GAGES None ZERO GAGE HEIGHT ELEVATION 1,381.65 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height EXTREME FOR PERIOD OF RECORD 1,077 cfs | 4.70 feet | 09/04/2012 FCDMC Annual Surface Water Report, Water Year 2020 Page 635 Watershed Map Powerline Floodway - water year peaks 1,200 Discharge (cfs) 1,000 800 600 400 200 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 636 2020 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) 11/29/2019 0.72 21 Hydrograph of peak WY 2020 flow event, 11/29/2019 Flood Flow Frequency Runoff at this station is mainly due to discharge from Powerline FRS and Vineyard FRS and is regulated by the size of the outlets for each structure. Flood Frequency data would not be meaningful at this location. FCDMC Annual Surface Water Report, Water Year 2020 Page 637 Powerline Floodway, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 10 30 1 --31 ---------------------------------------------------------------------------------------TOTAL 0 11 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 21 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 21 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 11 MEAN 0 MAX 21 MIN 0 AC_FT 22 FCDMC Annual Surface Water Report, Water Year 2020 Page 638 Powerline FRS, ID #36807 Site Data LOCATION Located south of Apache Junction east of Ironwood Road DRAINAGE AREA 46.2 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Pinal County, Arizona WATERSHED Upper East Maricopa Floodway SECTION/TOWNSHIP/RANGE S09 T1S R8E LATITUDE N 33° 21' 16.7" | +33.35463 LONGITUDE W 111° 32' 45.5" | ‐111.54598 STREAMGAGE INSTALLATION DATE 12/02/1992 ‐ WY 1993 AVAILABLE PERIOD OF RECORD (POR) 12/02/1992 ‐ Current LENGTH OF AVAILABLE POR DATA 27.83 Years | 10,165 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.20 feet Gage Height STAFF GAGES 5 ZERO GAGE HEIGHT ELEVATION 1,563.82 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY ELEVATION 21.1 feet Gage Height TOP OF DAM ELEVATION 25.6 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 639 Watershed Map Powerline FRS - water year peaks Volume (acre-feet) 1,200 1,000 800 600 400 200 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 640 2015 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/21/2019 11/29/2019 12/02/2019 Peak Gage Height (feet) 0.73 1.46 1.90 0.48 Peak Volume (ac‐ft) 46.6 93.1 121.1 30.7 Hydrograph of peak WY 2020 impoundment event, 11/29/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 641 Percent Spillway Capacity 0.7 1.6 2.4 0.4 Powerline FRS, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 --18 19 20 2 21 22 23 24 25 26 27 28 29 2 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 3 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 70 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 7 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 3 MEAN 0 MAX 70 MIN 0 AC_FT 7 FCDMC Annual Surface Water Report, Water Year 2020 Page 642 Powerline FRS, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 29 2 8 3 4 5 6 7 1 8 9 10 11 12 13 14 15 16 17 18 1 19 20 4 21 36 22 64 23 19 24 25 26 27 28 29 78 30 88 --31 ---------------------------------------------------------------------------------------MEAN 0 10 1 0 0 0 0 0 0 0 0 0 MAX 0 121 62 0 0 31 0 0 0 421 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 1 MAX 421 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 643 Powerline FRS, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.2 0.2 0.5 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 5 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 6 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 7 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 8 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 9 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 10 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 11 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 12 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 13 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 14 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 15 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 16 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 17 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 18 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 19 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 20 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 21 0.2 0.7 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 22 0.2 1.0 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 23 0.2 0.4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 24 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 25 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 26 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 27 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 28 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 29 0.2 1.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 30 0.2 1.4 0.2 0.2 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 31 0.2 --0.2 0.2 --0.2 --0.2 --0.2 0.2 -------------------------------------------------------------------------------MEAN 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 MAX 0.2 1.9 1.0 0.2 0.2 0.5 0.2 0.2 0.2 4.7 0.2 0.2 MIN 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.21 MAX 4.69 MIN 0.20 FCDMC Annual Surface Water Report, Water Year 2020 Page 644 Price Drain, ID #31507 Site Data LOCATION Located within the Loop 101 / Loop 202 Interchange DRAINAGE AREA Not Determined STREAM TYPE Engineered Channel JURISDICTION Mesa WATERSHED Lower East Maricopa Floodway SECTION/TOWNSHIP/RANGE S18 T1N R5E LATITUDE N 33° 26' 03.8" | +33.43440 LONGITUDE W 111° 53' 25.0" | ‐111.89028 STREAMGAGE INSTALLATION DATE 02/18/2001 ‐ WY 2001 AVAILABLE PERIOD OF RECORD (POR) 02/18/2001 ‐ Current LENGTH OF AVAILABLE POR DATA DATA 19.62 Years | 7,165 Days DATA GAPS IN POR None STAGE GAGE TYPE Pressure Transducer STAGE GAGE ELEVATION 0.20 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,158.14 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height EXTREME FOR PERIOD OF RECORD 993 cfs | 8.50 feet | 03/04/2004 FCDMC Annual Surface Water Report, Water Year 2020 Page 645 Location Map (watershed undetermined) Price Drain - water year peaks 1,200 Discharge (cfs) 1,000 800 600 400 200 0 2000 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 646 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/21/2019 11/29/2019 12/09/2019 12/25/2019 02/11/2020 02/22/2020 03/11/2020 03/12/2020 03/18/2020 07/24/2020 Peak Gage Height (feet) 3.19 3.98 3.66 1.94 2.04 2.66 3.73 3.66 3.73 2.21 4.95 Hydrograph of peak WY 2020 flow event, 07/24/2020 Flood Flow Frequency This site is not suitable to compute a flood flow frequency. FCDMC Annual Surface Water Report, Water Year 2020 Page 647 Peak Discharge (cfs) 151 228 195 58 64 108 202 195 202 75 360 Price Drain, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 10 9 21 5 6 10 11 7 22 21 48 2 13 8 10 6 5 10 15 6 20 19 65 3 13 8 2 --9 5 12 11 12 19 18 62 4 20 8 2 --5 12 12 10 12 15 19 55 5 18 8 2 --5 6 11 7 12 11 20 58 6 14 8 2 --5 6 13 12 8 14 23 65 7 15 5 1 --7 11 14 7 15 19 64 8 13 10 8 --5 13 14 10 25 20 83 9 14 9 13 ----6 15 13 5 23 18 94 10 18 8 34 2 8 19 14 15 11 19 19 117 11 15 10 15 5 48 79 14 15 15 20 20 113 12 11 12 2 5 22 42 14 12 14 18 20 112 13 12 14 4 9 13 56 13 12 13 15 23 100 14 10 14 10 14 8 14 13 14 12 18 21 105 15 11 16 12 16 6 11 17 17 9 17 17 112 16 14 14 10 7 8 18 15 11 22 19 131 17 13 12 --9 9 11 16 11 19 22 19 153 18 19 8 --7 10 27 15 12 14 18 23 149 19 19 13 --11 8 44 13 10 11 19 22 136 20 16 70 --6 7 17 9 16 14 16 25 142 21 17 92 1 12 7 13 15 16 13 19 20 178 22 12 44 12 77 8 18 5 15 23 18 200 23 11 21 3 7 28 7 19 2 11 30 19 227 24 11 13 17 5 11 16 5 12 40 20 220 25 5 3 30 6 8 9 14 7 18 38 22 219 26 16 7 23 7 14 14 16 10 12 18 29 194 27 8 3 38 7 16 11 17 16 9 14 36 186 28 12 1 16 5 6 6 17 14 11 14 37 183 29 9 78 3 10 5 8 19 12 10 20 31 114 30 9 35 6 --8 14 10 16 20 40 41 31 7 --5 --8 --10 --20 37 -------------------------------------------------------------------------------TOTAL 406 562 270 175 368 486 428 365 351 625 710 3725 MEAN 13 19 9 6 13 16 14 12 12 20 23 124 MAX 24 228 64 17 202 202 35 21 26 360 48 240 MIN 1 0 ----3 3 1 1 3 9 15 --AC_FT 806 1114 535 348 731 964 848 723 696 1240 1407 7388 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 8470 MEAN 23 MAX 360 MIN --- AC_FT 16800 NOTE: There is almost always a base flow at this location, of undetermined origin. FCDMC Annual Surface Water Report, Water Year 2020 Page 648 Prickly Pear Wash, ID #8107 Site Data LOCATION Located at John Teets Park near Ramuda Drive and 43rd Way DRAINAGE AREA 1.38 mi2 STREAM TYPE Natural Stream JURISDICTION Phoenix, Arizona WATERSHED Skunk Creek SECTION/TOWNSHIP/RANGE S06 T4N R4E LATITUDE N 33° 43' 15.9" | +33.72107 LONGITUDE W 111° 59' 24.0" | ‐111.99001 STREAMGAGE INSTALLATION DATE 06/01/2017 ‐ WY 2017 AVAILABLE PERIOD OF RECORD (POR) 06/01/2017 ‐ Current LENGTH OF AVAILABLE POR DATA 3.33 Years | 1,218 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.70 feet Gage Height STAFF GAGES None CREST STAGE GAGES None ZERO GAGE HEIGHT ELEVATION 1,730.25 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD None recorded since installation FCDMC Annual Surface Water Report, Water Year 2020 Page 649 Watershed Map Discharge (cfs) Prickly Pear Wash - water year peaks 100 90 80 70 60 50 40 30 20 10 0 No runoff events recorded since installation. 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 650 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event There was no runoff events recorded in Water Year 2020. Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 651 Prickly Pear Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 652 Queen Creek at CAP, ID #38007 Site Data LOCATION Located in Pinal County at the CAP crossing and the Sonoqui Dike DRAINAGE AREA 256 mi2 STREAM TYPE Dike across natural stream JURISDICTION Pinal County, Arizona WATERSHED Upper East Maricopa Floodway SECTION/TOWNSHIP/RANGE S26 T2S R8E LATITUDE N 33° 13' 55.8" | +33.23216 LONGITUDE W 111° 30' 11.3" | ‐111.50314 STREAMGAGE INSTALLATION DATE 01/14/1999 ‐ WY 1999 AVAILABLE PERIOD OF RECORD (POR) 01/14/1999 ‐ Current LENGTH OF AVAILABLE POR DATA 21.71 Years | 7,931 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.20 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,569.00 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 1,043 cfs | 10.15 feet | 02/12/2005 FCDMC Annual Surface Water Report, Water Year 2020 Page 653 Watershed Map Queen Creek at CAP - water year peaks 1,200 Discharge (cfs) 1,000 800 600 400 200 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 654 2015 2020 2025 WY2020 Events Date of Peak 11/21/2019 11/29/2019 12/25/2019 12/28/2019 02/23/2020 03/13/2020 03/19/2020 Peak Gage Height 3.50 4.80 3.58 5.00 4.33 3.06 5.65 Peak Discharge (cfs) 265 481 277 518 396 195 628 Hydrograph of peak WY 2020 flow event, 03/19/2020 Flood Flow Frequency Flood Frequency cannot be calculated due to the metering and limit of the culvert inlets.. FCDMC Annual Surface Water Report, Water Year 2020 Page 655 Queen Creek at CAP, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 7 2 3 4 5 6 7 --8 --9 --10 11 12 13 78 14 139 15 19 16 17 18 19 398 20 303 21 174 189 22 167 117 23 74 192 21 24 2 163 25 152 20 26 123 27 182 28 371 29 206 212 30 194 126 --31 --28 -------------------------------------------------------------------------------------TOTAL 0 817 1200 0 374 1263 0 0 0 0 0 0 MEAN 0 27 39 0 13 41 0 0 0 0 0 0 MAX 0 481 518 0 396 628 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 1620 2381 0 743 2506 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 3655 MEAN 10 MAX 628 MIN 0 AC_FT 7249 FCDMC Annual Surface Water Report, Water Year 2020 Page 656 Queen Creek at Rittenhouse Road, ID #37707 Site Data LOCATION At the Queen Creek crossing of Rittenhouse Road DRAINAGE AREA 236 mi2 STREAM TYPE Natural Stream at culvert JURISDICTION Queen Creek, Arizona WATERSHED Upper East Maricopa Floodway SECTION/TOWNSHIP/RANGE S25 T2S R7E LATITUDE N 33° 13' 48.9" | +33.23025 LONGITUDE W 111° 35' 39.4" | ‐111.59428 STREAMGAGE INSTALLATION DATE 09/14/1993 ‐ WY 1993 AVAILABLE PERIOD OF RECORD (POR) 09/14/1993 – 09/18/2019 LENGTH OF AVAILABLE POR DATA 27.05 Years | 9,879 Days DATA GAPS IN POR 05/28/2014 ‐ 06/29/2014, 09/18/2019 – 07/22/2020 STAGE GAGE ELEVATION 0.10 feet Gage Height STAFF GAGES 1 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,438.00 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 575 cfs | 2.25 feet | 01/06/1995 FCDMC Annual Surface Water Report, Water Year 2020 Page 657 Watershed Map Queen Creek at Rittenhouse Road - water year peaks 700 Discharge (cfs) 600 500 400 300 200 100 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 658 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event Station was out of service for construction from October 1, 2019 to July 22, 2020. No runoff recorded from July 22, 2020 through September 30, 2020. Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 659 Queen Creek at Rittenhouse Road, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 --------------------2 --------------------3 --------------------4 --------------------5 --------------------6 --------------------7 --------------------8 --------------------9 --------------------10 --------------------11 --------------------12 --------------------13 --------------------14 --------------------15 --------------------16 --------------------17 --------------------18 --------------------19 --------------------20 --------------------21 --------------------22 ------------------23 ------------------24 ------------------25 ------------------26 ------------------27 ------------------28 ------------------29 ------------------30 ------------------31 -------------------------------------------------------------------------------------------------TOTAL ------------------0 0 0 MEAN ------------------0 0 0 MAX ------------------0 0 0 MIN ------------------0 0 0 AC_FT ------------------0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 NOTE: Station was out of service from October 1, 2019 to July 22, 2020. FCDMC Annual Surface Water Report, Water Year 2020 Page 660 Rainbow Wash, ID #42807 Site Data LOCATION Located on SR85 about 10 miles south of Buckeye DRAINAGE AREA 17.6 mi2 STREAM TYPE Natural Stream JURISDICTION Maricopa County, Arizona WATERSHED Gillespie SECTION/TOWNSHIP/RANGE S23 T2S R4W LATITUDE N 33° 14' 08.0" | +33.23556 LONGITUDE W 112° 38' 21.0" | ‐112.63917 STREAMGAGE INSTALLATION DATE 11/06/2000 ‐ WY 2001 AVAILABLE PERIOD OF RECORD (POR) 11/06/2000 ‐ Current LENGTH OF AVAILABLE POR DATA 19.90 Years | 7,269 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.07 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 900.06 feet NAVD88 POINT OF ZERO FLOW 0.1 feet Gage Height EXTREME FOR PERIOD OF RECORD 7,500 cfs | 8.20 feet | 09/08/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 661 Watershed Map Rainbow Wash - water year peaks 8,000 Discharge (cfs) 7,000 6,000 5,000 4,000 3,000 2,000 1,000 0 2000 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 662 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/20/2019 11/29/2019 03/13/2020 03/13/2020 03/18/2020 07/23/2020 Peak Gage Height (feet) 0.72 0.70 2.17 2.90 2.37 1.74 3.84 Peak Discharge (cfs) 50 62 483 874 592 300 1,899 Hydrograph of peak WY 2020 flow event, 07/23/2020 Flood Flow Frequency Flood Flow Frequency N=20, HEC‐WRC computation (based on 20 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 584 1,800 3,180 5,030 8,310 11,500 NOTE: These results are based on limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 663 Rainbow Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 19 13 81 14 15 16 17 18 26 19 20 6 21 22 23 140 24 25 26 27 28 29 36 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 42 0 0 0 127 0 0 0 140 0 0 MEAN 0 1 0 0 0 4 0 0 0 5 0 0 MAX 0 483 0 0 0 874 0 0 0 1899 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 84 0 0 0 251 0 0 0 277 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 309 MEAN 1 MAX 1899 MIN 0 AC_FT 612 FCDMC Annual Surface Water Report, Water Year 2020 Page 664 Rawhide Wash, ID #61007 Site Data LOCATION On Dynamite Boulevard about 1/4 mile west of Pima Road DRAINAGE AREA 9.2 mi2 STREAM TYPE Natural stream JURISDICTION Scottsdale, Arizona WATERSHED Upper Indian Bend SECTION/TOWNSHIP/RANGE S36 T5N R4E LATITUDE N 33° 44' 28.1" | +33.74115 LONGITUDE W 111° 53' 53.3" | ‐111.89814 STREAMGAGE INSTALLATION DATE 07/27/1999 ‐ WY 1999 AVAILABLE PERIOD OF RECORD (POR) 07/27/1999 ‐ Current LENGTH OF AVAILABLE POR DATA 21.18 Years | 7,737 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.52 feet Gage Height STAFF GAGES 1 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 2,220.14 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 446 cfs | 2.07 feet | 09/09/2006 FCDMC Annual Surface Water Report, Water Year 2020 Page 665 Watershed Map Discharge (cfs) Rawhide Wash - water year peaks 500 450 400 350 300 250 200 150 100 50 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 666 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No runoff recorded in Water Year 2020. Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 667 Rawhide Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 11 12 13 14 15 16 17 18 --19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 668 Reata Pass Dam, ID #61207 Site Data LOCATION Located south of Dynamite Boulevard and east of Alma School Parkway DRAINAGE AREA 1.0 mi2 JURISDICTION Scottsdale, Arizona WATERSHED Upper Indian Bend SECTION/TOWNSHIP/RANGE S33 T5N R5E LATITUDE N 33° 44' 04.1" | +33.73446 LONGITUDE W 111° 50' 37.0" | ‐111.84362 STREAMGAGE INSTALLATION DATE 10/02/2001 ‐ WY 2002 AVAILABLE PERIOD OF RECORD (POR) 10/02/2001 ‐ Current LENGTH OF AVAILABLE POR DATA 19.00 Years | 6,939 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.15 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 2,590.15 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY CREST ELEVATION 16.85 feet Gage Height TOP OF DAM ELEVATION 19.45 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 669 Watershed Map Reata Pass Dam - water year peaks Volume (acre-feet) 25 20 15 10 5 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 670 2015 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/20/2019 11/29/2019 12/09/2019 12/24/2019 12/25/2019 12/27/2019 02/11/2020 02/22/2020 03/11/2020 03/13/2020 03/18/2020 Peak Gage Height (feet) 1.34 1.17 1.49 2.41 0.69 1.12 0.79 1.96 2.09 2.21 3.06 1.89 Peak Volume (ac‐ft) 0.1 0.0 0.3 0.8 0.0 0.0 0.0 0.5 0.6 0.7 1.4 0.5 Hydrograph of peak WY 2020 impoundment event, 03/13/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 671 Percent Spillway Capacity 0.0 0.0 0.8 1.8 0.0 0.0 0.0 1.2 1.4 1.5 2.9 1.1 Reata Pass Dam, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 5 10 11 7 11 12 3 13 20 14 7 15 1 16 17 18 1 19 20 21 22 9 23 1 24 25 26 27 28 29 1 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 1 5 0 17 43 0 0 0 0 0 0 MEAN 0 0 0 0 1 1 0 0 0 0 0 0 MAX 0 6 44 0 24 73 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 2 10 0 34 85 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 66 MEAN 0 MAX 73 MIN 0 AC_FT 131 FCDMC Annual Surface Water Report, Water Year 2020 Page 672 Reata Pass Dam, volume data Volume, in Acre-Feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 1 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 1 0 1 1 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 1 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 673 Reata Pass Dam, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 4 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 5 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 6 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 7 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 8 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 9 0.1 0.1 0.6 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 10 0.1 0.1 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 11 0.1 0.1 0.1 0.1 1.4 1.2 0.1 0.1 0.1 0.1 0.1 0.1 12 0.1 0.1 0.1 0.1 0.3 1.2 0.1 0.1 0.1 0.1 0.1 0.1 13 0.1 0.1 0.1 0.1 0.1 1.9 0.1 0.1 0.1 0.1 0.1 0.1 14 0.1 0.1 0.1 0.1 0.1 1.5 0.1 0.1 0.1 0.1 0.1 0.1 15 0.1 0.1 0.1 0.1 0.1 1.0 0.1 0.1 0.1 0.1 0.1 0.1 16 0.1 0.1 0.1 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 17 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 18 0.1 0.1 0.1 0.1 0.1 0.4 0.1 0.1 0.1 0.1 0.1 0.1 19 0.1 0.1 0.1 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 20 0.1 0.4 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 21 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 22 0.1 0.1 0.1 0.1 1.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 23 0.1 0.1 0.1 0.1 0.8 0.1 0.1 0.1 0.1 0.1 0.1 0.1 24 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 25 0.1 0.1 0.5 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 26 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 27 0.1 0.1 0.4 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 28 0.1 0.1 0.3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 29 0.1 0.4 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 30 0.1 0.1 0.1 0.1 --0.1 0.1 0.1 0.1 0.1 0.1 0.1 31 0.1 --0.1 0.1 --0.1 --0.1 --0.1 0.1 -------------------------------------------------------------------------------MEAN 0.1 0.2 0.2 0.1 0.3 0.4 0.1 0.1 0.1 0.1 0.1 0.1 MAX 0.1 1.5 2.4 0.1 2.1 3.1 0.1 0.1 0.1 0.1 0.1 0.1 MIN 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.18 MAX 3.06 MIN 0.15 FCDMC Annual Surface Water Report, Water Year 2020 Page 674 Reata Pass Wash – ID #60007 Site Data LOCATION Located on Pinnacle Peak Road about 1.6 miles east of Pima Road DRAINAGE AREA 7.9 mi2 STREAM TYPE Natural stream JURISDICTION Scottsdale, Arizona WATERSHED Upper Indian Bend SECTION/TOWNSHIP/RANGE S17 T4N R5E LATITUDE N 33° 41' 52.9" | +33.69804 LONGITUDE W 111° 51' 50.6" | ‐111.86408 STREAMGAGE INSTALLATION DATE 05/15/2001 ‐ WY 2001 AVAILABLE PERIOD OF RECORD (POR) 05/15/2001 ‐ Current LENGTH OF AVAILABLE POR DATA 19.38 Years | 7,079 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.30 feet Gage Height ZERO GAGE HEIGHT ELEVATION 2,172.78 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 1,197 cfs | 2.08 feet | 09/08/2014 EXTREME OUTSIDE PERIOD OF RECORD 1,780 cfs | 08/29/1996 FCDMC Annual Surface Water Report, Water Year 2020 Page 675 Watershed Map Reata Pass Wash - water year peaks 1,400 Discharge (cfs) 1,200 1,000 800 600 400 200 0 2000 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 676 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No runoff recorded in Water Year 2020. Flood Flow Frequency Flood Flow Frequency N=20, HEC‐WRC computation (based on 20 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 106 662 1,460 2,580 4,510 6,260 FCDMC Annual Surface Water Report, Water Year 2020 Page 677 Reata Pass Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 678 Rittenhouse FRS, ID #37207 Site Data LOCATION East of town of Queen Creek in Pinal County DRAINAGE AREA 47.1 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Pinal County WATERSHED Upper East Maricopa Floodway SECTION/TOWNSHIP/RANGE S02 T2S R8E LATITUDE N 33° 17' 20.3" | +33.28896 LONGITUDE W 111° 30' 23.7" | ‐111.50659 STREAMGAGE INSTALLATION DATE 09/27/1988 ‐ WY 1988 AVAILABLE PERIOD OF RECORD (POR) 09/27/1988 ‐ Current LENGTH OF AVAILABLE POR DATA 32.01 Years | 11,692 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.25 feet Gage Height STAFF GAGES 4 ZERO GAGE HEIGHT ELEVATION 1,578.97 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY ELEVATION 19.4 feet Gage Height TOP OF DAM ELEVATION 24.4 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 679 Watershed Map Volume (acre-feet) Rittenhouse FRS - water year peaks 1,000 900 800 700 600 500 400 300 200 100 0 1985 1990 1995 2000 2005 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 680 2010 2015 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/20/2019 11/21/2019 11/29/2019 12/24/2019 12/27/2019 03/18/2020 08/30/2020 Peak Gage Height (feet) 1.22 0.77 2.04 4.58 1.32 1.02 1.42 1.34 Peak Volume (ac‐ft) 1.9 0.7 5.4 38.0 2.3 1.1 2.7 2.4 Hydrograph of peak WY 2020 impoundment event, 11/29/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 681 Percent Spillway Capacity 0.0 0.0 0.1 1.0 0.0 0.0 0.0 0.0 Rittenhouse FRS, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 2 19 1 20 2 21 5 22 2 23 24 1 25 2 26 27 3 28 29 25 30 --1 31 ---------------------------------------------------------------------------------------TOTAL 0 34 6 0 0 3 0 0 0 0 1 0 MEAN 0 1 0 0 0 0 0 0 0 0 0 0 MAX 0 62 10 0 0 11 0 0 0 0 10 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 68 12 0 0 6 0 0 0 0 2 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 45 MEAN 0 MAX 62 MIN 0 AC_FT 88 FCDMC Annual Surface Water Report, Water Year 2020 Page 682 Rittenhouse FRS, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 1 22 1 23 24 25 26 27 28 29 12 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 39 2 0 0 3 0 0 0 0 2 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 39 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 683 Rittenhouse FRS, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 5 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 6 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 7 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 8 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 9 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 10 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 11 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 12 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 13 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 14 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 15 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 16 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 17 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 18 0.2 0.2 0.2 0.2 0.2 0.5 0.2 0.2 0.2 0.2 0.2 0.2 19 0.2 0.2 0.2 0.2 0.2 0.4 0.2 0.2 0.2 0.2 0.2 0.2 20 0.2 0.5 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 21 0.2 0.7 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 22 0.2 0.5 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 23 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 24 0.2 0.2 0.4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 25 0.2 0.2 0.4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 26 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 27 0.2 0.2 0.6 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 28 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 29 0.2 2.1 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 30 0.2 0.2 0.2 0.2 --0.2 0.2 0.2 0.2 0.2 0.4 0.2 31 0.2 --0.2 0.2 --0.2 --0.2 --0.2 0.2 -------------------------------------------------------------------------------MEAN 0.2 0.3 0.3 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.3 0.2 MAX 0.2 4.6 1.3 0.2 0.2 1.4 0.2 0.2 0.2 0.2 1.3 0.2 MIN 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.26 MAX 4.61 MIN 0.25 FCDMC Annual Surface Water Report, Water Year 2020 Page 684 Roeser Road at 23rd Avenue Basin, ID #66807 Site Data LOCATION Located on the basin at the northeast corner of Roeser Rd and 23rd Avenue DRAINAGE AREA Undetermined STREAM TYPE Flood control basin JURISDICTION Phoenix, Arizona WATERSHED South Mountain SECTION/TOWNSHIP/RANGE S25 T1N R2E LATITUDE N 33° 23' 58.9" | +33.39968 LONGITUDE W 112° 09' 02.5" | ‐112.15070 STREAMGAGE INSTALLATION DATE 10/01/2015 ‐ WY 2016 AVAILABLE PERIOD OF RECORD (POR) 10/01/2015 ‐ Current LENGTH OF AVAILABLE POR DATA 5.00 Years | 1,827 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.20 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,045.76 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY CREST ELEVATION No spillway TOP OF BASIN ELEVATION 10.5 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 685 Watershed Map Roeser Road at 23rd Avenue Basin - water year peaks 40 Volume (acre-feet) 35 30 25 20 15 10 5 0 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 686 2025 WY2020 Events Date of Peak 11/19/2019 11/20/2019 11/21/2019 11/29/2019 12/07/2019 12/24/2019 12/25/2019 12/26/2019 01/21/2020 02/11/2020 02/22/2020 03/10/2020 03/11/2020 03/12/2020 03/12/2020 03/13/2020 03/13/2020 03/18/2020 05/10/2020 Peak Gage Height (feet) 1.07 1.00 1.97 1.67 0.67 0.77 0.70 0.70 0.85 1.70 1.97 1.35 1.70 1.57 1.75 1.80 1.12 1.10 1.17 Peak Volume (ac‐ft) 12.2 11.4 22.4 18.9 7.6 8.8 8.0 8.0 9.7 19.3 22.4 15.3 19.3 17.8 19.9 20.4 12.7 12.5 13.3 Hydrograph of peak WY 2020 impoundment event, 02/22/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 687 Percent Spillway Capacity 9.0 8.4 16.4 13.9 5.6 6.5 5.9 5.9 7.1 14.1 16.4 11.3 14.1 13.1 14.6 15.0 9.4 9.2 9.8 Roeser Road at 23rd Avenue Basin, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 NOTE: There is currently no discharge rating at this location. FCDMC Annual Surface Water Report, Water Year 2020 Page 688 Roeser Road at 23rd Avenue Basin, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 1 8 1 1 9 10 2 1 11 2 7 12 5 13 6 14 15 16 1 17 18 3 19 2 20 4 21 6 2 22 5 23 24 3 25 2 26 1 27 1 28 29 4 30 --31 ---------------------------------------------------------------------------------------MEAN 0 1 0 0 0 1 0 0 0 0 0 0 MAX 0 19 9 10 22 20 0 13 0 0 0 3 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 22 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 689 Roeser Road at 23rd Avenue Basin, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 5 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 6 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 7 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 8 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 9 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 10 0.2 0.2 0.2 0.2 0.2 0.4 0.2 0.3 0.2 0.2 0.2 0.2 11 0.2 0.2 0.2 0.2 0.4 0.7 0.2 0.2 0.2 0.2 0.2 0.2 12 0.2 0.2 0.2 0.2 0.2 0.6 0.2 0.2 0.2 0.2 0.2 0.2 13 0.2 0.2 0.2 0.2 0.2 0.6 0.2 0.2 0.2 0.2 0.2 0.2 14 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 15 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 16 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 17 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 18 0.2 0.2 0.2 0.2 0.2 0.4 0.2 0.2 0.2 0.2 0.2 0.2 19 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 20 0.2 0.4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 21 0.2 0.5 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 22 0.2 0.2 0.2 0.2 0.6 0.2 0.2 0.2 0.2 0.2 0.2 0.2 23 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 24 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 25 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 26 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 27 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 28 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 29 0.2 0.5 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 30 0.2 0.2 0.2 0.2 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 31 0.2 --0.2 0.2 --0.2 --0.2 --0.2 0.2 -------------------------------------------------------------------------------MEAN 0.2 0.3 0.2 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 MAX 0.2 1.7 0.8 0.8 2.0 1.8 0.2 1.2 0.2 0.2 0.2 0.2 MIN 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.24 MAX 1.97 MIN 0.23 FCDMC Annual Surface Water Report, Water Year 2020 Page 690 Saddleback FRS, ID #25207 Site Data LOCATION Located south of I‐10 along Courthouse Road DRAINAGE AREA 29.6 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Maricopa County, Arizona WATERSHED Lower Centennial SECTION/TOWNSHIP/RANGE S34 T2N R8W LATITUDE N 33° 27' 59.8" | +33.46660 LONGITUDE W 113° 04' 21.3" | ‐113.07258 STREAMGAGE INSTALLATION DATE 12/16/1988 ‐ WY 1989 AVAILABLE PERIOD OF RECORD (POR) 12/16/1988 ‐ Current LENGTH OF AVAILABLE POR DATA 31.79 Years | 11,612 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.30 feet Gage Height STAFF GAGES 3 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,178.93 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY ELEVATION No Spillway TOP OF DAM ELEVATION 16.1 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 691 Watershed Map Saddleback FRS - water year peaks Volume (acre-feet) 120 100 80 60 40 20 0 1985 1990 1995 2000 2005 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 692 2010 2015 2020 2025 WY2020 Events Date of Peak 11/29/2019 03/13/2020 Peak Gage Height (feet) 1.07 0.75 Peak Volume (ac‐ft) 68.3 55.4 Hydrograph of peak WY 2020 impoundment event, 11/29/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 693 Percent Total Capacity 1.0 0.6 Saddleback FRS, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 1 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 1 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 37 0 0 0 2 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 3 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 1 MEAN 0 MAX 37 MIN 0 AC_FT 3 FCDMC Annual Surface Water Report, Water Year 2020 Page 694 Saddleback FRS, volume data Volume, in acre feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 11 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 9 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 68 0 0 0 55 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 68 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 695 Saddleback FRS, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 2 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 4 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 5 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 7 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 8 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 9 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 10 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 11 0.3 0.3 0.0 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 12 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 13 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 14 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 15 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 16 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 17 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 18 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 19 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 20 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 21 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 22 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 23 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 24 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 25 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 26 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 27 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 28 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 29 0.3 0.4 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 30 0.3 0.3 0.3 0.3 --0.3 0.3 0.3 0.3 0.3 0.3 0.3 31 0.3 --0.3 0.3 --0.3 --0.3 --0.3 0.3 -------------------------------------------------------------------------------MEAN 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 MAX 0.3 1.1 0.3 0.3 0.3 0.8 0.3 0.3 0.3 0.3 0.3 0.3 MIN 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.30 MAX 1.07 MIN 0.30 FCDMC Annual Surface Water Report, Water Year 2020 Page 696 Salt River below Granite Reef Dam, ID #75307 Site Data LOCATION Located about 1/2 mile downstream from Granite Reef Diversion structure DRAINAGE AREA 12,919 mi2 STREAM TYPE Natural Stream JURISDICTION Salt River Pima‐Maricopa Indian Community, Arizona WATERSHED Lower Verde / Evergreen SECTION/TOWNSHIP/RANGE S13 T2N R6E LATITUDE N 33° 30' 53.5" | +33.5147 LONGITUDE W 111° 41' 56.4" | ‐111.6990 STREAMGAGE INSTALLATION DATE 04/02/2012 ‐ WY 2012 AVAILABLE PERIOD OF RECORD (POR) 04/02/2012 ‐ Current LENGTH OF AVAILABLE POR DATA 8.50 Years | 3,104 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 4.25 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,276.00 feet NAVD88 POINT OF ZERO FLOW Undetermined EXTREME FOR PERIOD OF RECORD 22,641 cfs | 16.32 feet | 03/01/2017 FCDMC Annual Surface Water Report, Water Year 2020 Page 697 Watershed Map Salt River below Granite Reef - water year peaks Discharge (cfs) 25,000 20,000 15,000 10,000 5,000 0 2010 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 698 2025 WY2020 Events Date of Peak 10/30/2019 12/28/2019 02/23/2020 02/23/2020 03/13/2020 03/19/2020 03/20/2020 03/21/2020 03/22/2020 03/23/2020 03/24/2020 03/26/2020 04/01/2020 Peak Gage Height (feet) 6.88 7.76 8.40 7.03 8.30 8.45 7.91 9.33 10.31 10.06 9.91 8.99 7.03 Peak Discharge (cfs) 1,083 1,779 2,467 1,183 1,032 1,129 808 1,846 3,004 2,667 2,479 1,537 440 Hydrograph of peak WY 2020 flow event, 03/22/2020 Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 699 Salt River below Granite Reef Dam, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 21 5 183 2 21 22 3 24 4 23 5 25 10 6 25 21 7 25 --8 25 --9 28 16 --10 27 16 13 11 31 16 12 31 16 13 16 10 376 14 10 387 15 10 10 2 16 27 10 17 32 22 18 31 22 19 31 22 455 20 31 21 675 21 31 25 1706 22 31 28 253 2661 23 34 23 1145 2569 24 35 1 2314 25 39 1483 26 43 1366 27 49 5 924 28 585 23 839 29 17 105 23 625 30 115 22 16 --308 31 --16 -------------------------------------------------------------------------------------TOTAL 115 39 1434 349 1515 16691 205 0 0 0 0 0 MEAN 4 1 46 11 52 538 7 0 0 0 0 0 MAX 1083 25 1779 31 2467 3004 440 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 228 77 2844 693 3005 33106 407 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 20348 MEAN 56 MAX 3004 MIN 0 AC_FT 40360 FCDMC Annual Surface Water Report, Water Year 2020 Page 700 Salt River at Val Vista Drive, ID #39507 Site Data LOCATION Located north of SR202L and west of Val Vista Drive DRAINAGE AREA 12,951 mi2 STREAM TYPE Natural Stream JURISDICTION Mesa, Arizona WATERSHED Lower EMF / Evergreen SECTION/TOWNSHIP/RANGE S29 T2N R6E LATITUDE N 33° 29' 03.3" | +33.48426 LONGITUDE W 111° 45' 44.1" | ‐111.76225 STREAMGAGE INSTALLATION DATE 04/14/2011 ‐ WY 2011 AVAILABLE PERIOD OF RECORD (POR) 04/14/2011 ‐ Current LENGTH OF AVAILABLE POR DATA 9.47 Years | 3,458 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.40 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,240.00 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 21,048 cfs | 10.76 feet | 03/01/2017 FCDMC Annual Surface Water Report, Water Year 2020 Page 701 Watershed Map Salt River at Val Vista Drive - water year peaks Discharge (cfs) 25,000 20,000 15,000 10,000 5,000 0 2010 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 702 2025 WY2020 Events Date of Peak 03/21/2020 03/22/2020 03/23/2020 03/24/2020 03/25/2020 03/26/2020 03/26/2020 03/28/2020 Peak Gage Height 3.61 4.81 4.63 4.71 3.56 3.59 3.49 2.96 Peak Discharge (cfs) 944 3,022 2,699 2,840 868 913 770 281 Hydrograph of peak WY 2020 flow event, 03/22/2020 Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 703 Salt River at Val Vista Drive, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 --1 2 1 3 4 5 6 7 --8 --9 --10 11 12 13 14 1 15 16 17 18 19 20 11 21 749 22 2281 23 2311 24 2053 25 874 26 645 27 226 28 122 29 42 30 --13 31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 9329 1 0 0 0 0 0 MEAN 0 0 0 0 0 301 0 0 0 0 0 0 MAX 0 0 0 0 0 3022 3 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 18504 3 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 9330 MEAN 26 MAX 3022 MIN 0 AC_FT 18507 FCDMC Annual Surface Water Report, Water Year 2020 Page 704 Salt River at Priest Drive, ID #67307 Site Data LOCATION Located on the Priest Drive Bridge DRAINAGE AREA 13,223 mi2 STREAM TYPE Channelized Natural Stream JURISDICTION Tempe, Arizona WATERSHED Lower ACDC / South Mountain SECTION/TOWNSHIP/RANGE S17 T1N R4E LATITUDE N 33° 26' 02.4" | +33.43401 LONGITUDE W 111° 57' 40.7" | ‐111.96132 STREAMGAGE INSTALLATION DATE 12/07/1993 ‐ WY 1994 AVAILABLE PERIOD OF RECORD (POR) 12/07/1993 ‐ Current LENGTH OF AVAILABLE POR DATA 26.82 Years | 9,795 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 2.60 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,121.81 feet NAVD88 POINT OF ZERO FLOW 2.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 78,850 cfs | 12.57 feet | 02/16/1995 FCDMC Annual Surface Water Report, Water Year 2020 Page 705 Watershed Map Salt River at Priest Drive - water year peaks 90,000 Discharge (cfs) 80,000 70,000 60,000 50,000 40,000 30,000 20,000 10,000 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 706 2015 2020 2025 WY2020 Events Date of Peak 03/22/2020 03/23/2020 03/24/2020 03/25/2020 03/26/2020 03/29/2020 Peak Gage Height 5.93 5.75 5.66 5.63 4.98 4.46 Peak Discharge (cfs) 4,119 3,527 3,256 3,169 1,421 460 Hydrograph of peak WY 2020 flow event, 03/22/2020 Flood Flow Frequency Flood Flow Frequency Source: Table 2‐4 from Study from Modified Roosevelt Dam 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year n/a 20,500 55,000 90,000 140,000 169,000 FCDMC Annual Surface Water Report, Water Year 2020 Page 707 Salt River at Priest Drive, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 9 10 11 12 13 223 14 37 15 16 17 18 19 20 21 22 1836 23 3342 24 2932 25 2770 26 627 27 993 28 452 29 290 30 --20 31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 13522 0 0 0 0 0 0 MEAN 0 0 0 0 0 436 0 0 0 0 0 0 MAX 0 0 0 0 0 4119 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 26820 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 13522 MEAN 37 MAX 4119 MIN 0 AC_FT 26820 See USGS Water‐Data Report AZ‐20‐1 for official data for this site. FCDMC Annual Surface Water Report, Water Year 2020 Page 708 Salt River at 7th Avenue, ID #68007 Site Data LOCATION Located on the 7th Avenue Bridge DRAINAGE AREA 13,223 mi2 STREAM TYPE Channelized Natural Stream JURISDICTION Phoenix, Arizona WATERSHED Lower ACDC / South Mountain SECTION/TOWNSHIP/RANGE S19 T1N R3E LATITUDE N 33° 25' 03.1" | +33.41752 LONGITUDE W 112° 04' 57.4" | ‐112.08262 STREAMGAGE INSTALLATION DATE 01/25/2012 ‐ WY 2012 AVAILABLE PERIOD OF RECORD (POR) 01/25/2012 ‐ Current LENGTH OF AVAILABLE POR DATA DATA 8.68 Years | 3,172 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.00 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,027.76 feet NAVD88 POINT OF ZERO FLOW Undetermined EXTREME FOR PERIOD OF RECORD 12.27 feet | 12,712 cfs | 03/01/2017 FCDMC Annual Surface Water Report, Water Year 2020 Page 709 Watershed Map Salt River at 7th Avenue - water year peaks 14,000 Discharge (cfs) 12,000 10,000 8,000 6,000 4,000 2,000 0 2010 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 710 2025 WY2020 Events Date of Peak 02/22/2020 03/23/2020 03/24/2020 03/25/2020 03/26/2020 03/27/2020 08/21/2020 Peak Gage Height 4.72 6.62 6.25 6.15 5.58 4.60 3.73 Peak Discharge (cfs) 109 1,722 884 716 149 104 72 Hydrograph of peak WY 2020 flow event, 03/23/2020 Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 711 Salt River at 7th Avenue, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 8 2 2 2 13 2 3 3 7 3 2 2 3 2 2 2 3 2 3 5 5 3 3 2 2 2 2 2 2 2 3 6 4 3 4 2 3 2 2 2 2 2 4 6 3 3 5 2 3 2 2 2 2 2 4 6 4 4 6 2 3 2 2 2 2 2 6 5 5 3 7 2 2 2 2 2 2 2 5 4 7 3 8 2 3 2 2 2 2 2 2 6 6 4 9 2 2 2 2 2 2 2 2 4 6 6 10 2 3 2 2 2 2 3 2 6 6 6 11 2 3 2 12 25 2 2 2 7 7 7 12 2 2 2 4 35 2 2 3 4 8 8 13 2 2 2 3 55 2 2 3 4 8 7 14 2 2 2 2 31 2 2 4 5 8 5 15 --2 2 2 2 10 2 2 3 6 9 5 16 --2 3 2 2 2 2 2 3 6 9 5 17 2 2 2 2 2 2 2 4 6 7 6 18 2 2 2 2 5 2 2 3 7 7 5 19 3 2 2 2 11 2 2 4 7 7 4 20 20 2 2 2 3 2 2 5 7 8 4 21 18 3 2 2 2 2 2 3 3 22 4 22 13 2 2 34 249 2 3 3 3 2 3 23 5 2 2 21 1331 2 3 3 5 2 3 24 2 7 2 9 569 2 2 4 6 3 5 25 2 13 2 2 351 2 2 4 7 4 5 26 2 7 2 2 98 2 2 6 4 4 6 27 2 11 2 2 87 2 2 4 5 3 6 28 2 10 2 2 55 2 2 3 5 3 4 29 32 4 2 2 48 2 4 3 6 4 3 30 19 2 2 --35 2 3 4 9 3 3 31 --2 2 --26 --3 --7 3 -------------------------------------------------------------------------------TOTAL 0 155 118 68 138 3055 82 80 104 169 187 134 MEAN 0 5 4 2 5 99 3 3 3 5 6 4 MAX 0 95 21 2 109 1722 16 5 7 10 72 9 MIN 0 0 2 2 2 2 2 2 2 3 2 2 AC_FT 0 306 233 136 273 6060 163 158 206 336 371 265 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 4289 MEAN 12 MAX 1722 MIN 0 AC_FT 8507 FCDMC Annual Surface Water Report, Water Year 2020 Page 712 Salt River at 51st Avenue, ID #5307 Site Data LOCATION Located at the 51st Avenue crossing of the Salt River DRAINAGE AREA 13,425 mi2 STREAM TYPE Channelized Natural Stream JURISDICTION Phoenix, Arizona WATERSHED Lower ACDC SECTION/TOWNSHIP/RANGE S29 T1N R2E LATITUDE N 33° 24' 15.7" | +33.40435 LONGITUDE W 112° 10' 07.4" | ‐112.16871 STREAMGAGE INSTALLATION DATE 04/27/2011 ‐ WY 2011 AVAILABLE PERIOD OF RECORD (POR) 04/27/2011 ‐ Current LENGTH OF AVAILABLE POR DATA DATA 9.43 Years | 3,445 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 1.90 feet Gage Height ZERO GAGE HEIGHT ELEVATION 986.89 feet NAVD88 POINT OF ZERO FLOW 1.5 feet Gage Height EXTREME FOR PERIOD OF RECORD 11,376 cfs | 10.50 feet GH | 03/01/2017 FCDMC Annual Surface Water Report, Water Year 2020 Page 713 Watershed Map Salt River at 51st Avenue - water year peaks 12,000 Discharge (cfs) 10,000 8,000 6,000 4,000 2,000 0 2010 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 714 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) 03/24/2020 4.20 485 Hydrograph of peak WY 2020 flow event, 03/24/2020 Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 715 Salt River at 51st Avenue, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 2 1 --3 2 4 2 5 2 6 2 7 2 8 2 9 --2 10 2 11 2 12 4 13 4 14 5 15 4 16 4 17 4 18 4 19 3 --20 2 --21 2 22 23 132 24 401 25 369 26 155 27 133 28 64 29 31 30 --18 31 ----9 -----------------------------------------------------------------------------------TOTAL 0 0 0 0 0 1366 2 0 0 0 0 0 MEAN 0 0 0 0 0 44 0 0 0 0 0 0 MAX 0 0 113 0 0 485 4 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 1 0 0 2709 5 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 1368 MEAN 4 MAX 485 MIN 0 AC_FT 2714 FCDMC Annual Surface Water Report, Water Year 2020 Page 716 Salt River at 67th Avenue, ID #5807 Site Data LOCATION Located at the 67th Avenue crossing of the Salt River DRAINAGE AREA 13,434 mi2 STREAM TYPE Culvert in Channelized Natural Stream JURISDICTION Maricopa County, Arizona WATERSHED Salt SECTION/TOWNSHIP/RANGE S30 T1N R2E LATITUDE N 33° 23' 51.8" | +33.39773 LONGITUDE W 112° 12' 12.6" | ‐112.20351 STREAMGAGE INSTALLATION DATE 07/14/2008 ‐ WY 2008 AVAILABLE PERIOD OF RECORD (POR) 07/14/2008 ‐ Current LENGTH OF AVAILABLE POR DATA 12.22 Years | 4,462 Days DATA GAPS IN POR None STAGE GAGE ELEVATION ‐0.35 feet Gage Height ZERO GAGE HEIGHT ELEVATION 975.21 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height EXTREME FOR PERIOD OF RECORD 17,847 cfs | 9.43 feet GH | 01/22/2010 FCDMC Annual Surface Water Report, Water Year 2020 Page 717 Watershed Map Discharge (cfs) Salt River at 67th Avenue - water year peak 20,000 18,000 16,000 14,000 12,000 10,000 8,000 6,000 4,000 2,000 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 718 2020 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) 03/24/2020 5.46 552 Hydrograph of peak WY 2020 flow event, 03/24/2020 Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 719 Salt River at 67th Avenue, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 69 25 541 26 497 27 445 28 192 29 96 30 --45 31 ----2 -----------------------------------------------------------------------------------TOTAL 0 0 0 0 0 1887 0 0 0 0 0 0 MEAN 0 0 0 0 0 61 0 0 0 0 0 0 MAX 0 0 0 0 0 552 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 3743 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 1887 MEAN 5 MAX 552 MIN 0 AC_FT 3743 FCDMC Annual Surface Water Report, Water Year 2020 Page 720 Sand Tank Wash at I‐8, ID #40007 Site Data LOCATION Located in Gila Bend along I‐8 DRAINAGE AREA 185 mi2 STREAM TYPE Natural Stream JURISDICTION Gila Bend, Arizona WATERSHED Gila Bend SECTION/TOWNSHIP/RANGE S06 T6S R4W LATITUDE N 32° 55' 59.1" | +32.93310 LONGITUDE W 112° 42' 20.8" | ‐112.70579 STREAMGAGE INSTALLATION DATE 05/31/2001 ‐ WY 2001 AVAILABLE PERIOD OF RECORD (POR) 05/31/2001 ‐ Current LENGTH OF AVAILABLE POR DATA 19.34 Years | 7,063 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 1.30 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 760.54 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 1,866 cfs | 4.75 feet | 08/26/2013 FCDMC Annual Surface Water Report, Water Year 2020 Page 721 Watershed Map Discharge (cfs) Sand Tank Wash at I-8 - water year peaks 2,000 1,800 1,600 1,400 1,200 1,000 800 600 400 200 0 2000 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 722 2020 2025 WY2020 Events Date of Peak 11/19/2019 11/29/2019 03/12/2020 Peak Gage Height (feet) 2.00 2.29 2.07 Peak Discharge (cfs) 195 331 227 Hydrograph of peak WY 2020 flow event, 11/29/2019 Flood Flow Frequency Flood Flow Frequency N=21, HEC‐WRC computation (based on 21 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 714 1,320 1,680 1,960 2,250 2,430 NOTE: These results are based on very limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 723 Sand Tank Wash at I-8, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 6 --13 14 --15 16 17 18 19 6 20 21 22 23 24 25 26 27 28 29 9 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 15 0 0 0 6 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 331 0 0 0 227 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 29 0 0 0 12 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 21 MEAN 0 MAX 331 MIN 0 AC_FT 41 FCDMC Annual Surface Water Report, Water Year 2020 Page 724 Santa Cruz River at SR84, ID #63807 Site Data LOCATION On SR 84 about 5 miles west of Casa Grande DRAINAGE AREA 78.8 mi2 STREAM TYPE Channelized Natural Stream JURISDICTION Pinal County, Arizona WATERSHED Santa Cruz SECTION/TOWNSHIP/RANGE S21 T6S R5E LATITUDE N 32° 52' 46.3" | +32.87952 LONGITUDE W 111° 49' 44.2" | ‐111.82895 STREAMGAGE INSTALLATION DATE 03/16/1994 ‐ WY 1994 AVAILABLE PERIOD OF RECORD (POR) 03/16/1994 ‐ Current LENGTH OF AVAILABLE POR DATA 26.55 Years | 9,696 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.00 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,346.06 feet NAVD88 POINT OF ZERO FLOW ‐1.3 feet Gage Height EXTREME FOR PERIOD OF RECORD 1,736 cfs | 4.38 feet | 08/02/2006 FCDMC Annual Surface Water Report, Water Year 2020 Page 725 Watershed Map Discharge (cfs) Santa Cruz River at SR84 - water year peaks 2,000 1,800 1,600 1,400 1,200 1,000 800 600 400 200 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 726 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) 11/30/2019 0.99 27 Hydrograph of peak WY 2020 flow event, 11/30/2019 Flood Flow Frequency Flood Flow Frequency N=27, HEC‐WRC computation (based on 27 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 100 281 494 800 1,390 2,040 FCDMC Annual Surface Water Report, Water Year 2020 Page 727 Santa Cruz River at SR84, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 1 6 7 8 9 10 11 1 12 13 14 15 16 17 18 19 20 21 3 22 23 2 24 3 25 26 27 5 28 1 29 30 11 --31 ---------------------------------------------------------------------------------------TOTAL 0 14 0 0 0 2 0 3 0 6 3 1 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 27 0 0 0 4 0 2 0 6 4 8 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 27 0 0 0 3 0 7 0 12 5 3 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 29 MEAN 0 MAX 27 MIN 0 AC_FT 57 FCDMC Annual Surface Water Report, Water Year 2020 Page 728 Sauceda Wash, ID #71007 Site Data LOCATION About 5 miles south of Gila Bend on SR 85 DRAINAGE AREA 126 mi2 STREAM TYPE Natural Stream JURISDICTION Maricopa County, Arizona WATERSHED Theba SECTION/TOWNSHIP/RANGE S27 T6S R5W LATITUDE N 32° 52' 49.6" | +32.88044 LONGITUDE W 112° 45' 15.4" | ‐112.75427 STREAMGAGE INSTALLATION DATE 02/28/1990 ‐ WY 1990 AVAILABLE PERIOD OF RECORD (POR) 02/28/1990 ‐ Current LENGTH OF AVAILABLE POR DATA 30.59 Years | 11,173 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 1.10 feet Gage Height STAFF GAGES 2 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 841.47 feet NAVD88 POINT OF ZERO FLOW 1.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 2,698 cfs | 5.70 feet GH | 08/13/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 729 Watershed Map Sauceda Wash - water year peaks 3,000 Discharge (cfs) 2,500 2,000 1,500 1,000 500 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 730 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Discharge (cfs) 03/12/2020 1.99 191 Hydrograph of peak WY 2020 flow event, 03/12/2020 Flood Flow Frequency Flood Flow Frequency N=48, HEC‐WRC computation (based on 48 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 419 1,210 2,010 2,970 4,490 5,830 NOTE: These results are based on limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 731 Sauceda Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 --4 5 6 7 8 9 10 11 12 3 13 4 --14 15 --16 --17 --18 19 20 21 22 23 24 25 26 27 28 29 30 --31 -----------------------------------------------------------------------------------------TOTAL 0 1 0 0 0 7 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 24 0 0 0 191 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 1 0 0 0 14 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 8 MEAN 0 MAX 191 MIN 0 AC_FT 15 FCDMC Annual Surface Water Report, Water Year 2020 Page 732 Scatter Wash, ID #14007 Site Data LOCATION Located west of 35th Avenue on eastbound Beardsley Road DRAINAGE AREA 12.4 mi2 STREAM TYPE Channelized Natural Stream JURISDICTION Phoenix, Arizona WATERSHED Upper ACDC SECTION/TOWNSHIP/RANGE S27 T4N R2E LATITUDE N 33° 40' 08.2" | +33.66893 LONGITUDE W 112° 08' 29.8" | ‐112.14160 STREAMGAGE INSTALLATION DATE 09/18/1996 ‐ WY 1996 AVAILABLE PERIOD OF RECORD (POR) 09/18/1996 ‐ Current LENGTH OF AVAILABLE POR DATA 24.04 Years | 8,779 Days DATA GAPS IN POR 07/23/2008 ‐ 11/18/2008 STAGE GAGE ELEVATION 0.00 feet Gage Height STAFF GAGES 1 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,332.26 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 1,784 cfs | 3.42 feet | 07/25/2007 FCDMC Annual Surface Water Report, Water Year 2020 Page 733 Watershed Map Discharge (cfs) Scatter Wash - water year peaks 2,000 1,800 1,600 1,400 1,200 1,000 800 600 400 200 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 734 2015 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/20/2019 11/29/2019 02/11/2020 02/22/2020 03/12/2020 03/12/2020 03/13/2020 03/13/2020 03/13/2020 03/18/2020 Peak Gage Height (feet) 1.01 1.26 1.06 0.86 0.84 0.86 0.61 1.09 0.64 0.61 0.64 Peak Discharge (cfs) 136 261 157 83 76 83 10 171 15 10 15 Hydrograph of peak WY 2020 flow event, 11/20/2019 Flood Flow Frequency Flood Flow Frequency N=24, HEC‐WRC computation (based on 24 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 535 980 1,270 1,520 1,810 2,000 NOTE(1): These results are based on very limited data. Flood Flow Frequency 1995 Flood Insurance Study 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 220 590 1,320 3,500 6,100 FCDMC Annual Surface Water Report, Water Year 2020 Page 735 Scatter Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 --11 8 --12 4 --13 19 --14 --15 16 17 18 1 19 20 89 21 13 22 12 23 24 25 26 27 28 29 39 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 141 0 0 20 24 0 0 0 0 0 0 MEAN 0 5 0 0 1 1 0 0 0 0 0 0 MAX 0 261 2 0 83 171 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 280 1 0 39 47 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 185 MEAN 1 MAX 261 MIN 0 AC_FT 366 FCDMC Annual Surface Water Report, Water Year 2020 Page 736 Seven Springs Wash, ID #21807 Site Data LOCATION On Seven Springs Road near Forest Road 254 DRAINAGE AREA 7.9 mi2 STREAM TYPE Natural Stream JURISDICTION Maricopa County WATERSHED Cave Creek SECTION/TOWNSHIP/RANGE S09 T7N R5E LATITUDE N 33° 57' 37.3" | +33.96035 LONGITUDE W 111° 50' 37.0" | ‐111.84361 STREAMGAGE INSTALLATION DATE 03/12/2002 ‐ WY 2002 AVAILABLE PERIOD OF RECORD (POR) 03/12/2002 ‐ Current LENGTH OF AVAILABLE POR DATA 18.56 Years | 6,778 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.60 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 3,481.67 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 11,700 cfs | 10.68 feet | 09/03/2005 FCDMC Annual Surface Water Report, Water Year 2020 Page 737 Watershed Map Seven Springs Wash - water year peaks 14,000 Discharge (cfs) 12,000 10,000 8,000 6,000 4,000 2,000 0 2000 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 738 2020 2025 WY2020 Events Date of Peak 11/29/2019 12/26/2019 12/27/2019 03/11/2020 03/13/2020 03/13/2020 03/18/2020 Peak Gage Height (feet) 2.44 1.42 1.07 1.12 3.16 1.79 1.27 Peak Discharge (cfs) 326 128 84 89 558 185 107 Hydrograph of peak WY 2020 flow event, 03/13/2020 Flood Flow Frequency Flood Flow Frequency N=19, HEC‐WRC computation (based on 19 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 285 1,420 3,220 6,240 13,000 21,000 NOTE: These results are based on very limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 739 Seven Springs Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 37 13 143 14 14 15 16 17 18 14 19 25 20 21 22 23 24 25 44 26 43 27 60 28 --29 77 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 77 218 0 0 232 0 0 0 0 0 0 MEAN 0 3 7 0 0 7 0 0 0 0 0 0 MAX 0 326 128 0 0 558 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 153 433 0 0 461 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 528 MEAN 1 MAX 558 MIN 0 AC_FT 1047 FCDMC Annual Surface Water Report, Water Year 2020 Page 740 Signal Butte FRS, ID #79507 Site Data LOCATION Located north of Brown Road between Meridian and Signal Butte Roads DRAINAGE AREA 16.4 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Mesa, Arizona WATERSHED Lower Verde SECTION/TOWNSHIP/RANGE S12 T1N R7E LATITUDE N 33° 26' 24.2" | +33.44005 LONGITUDE W 111° 35' 25.1" | ‐111.59031 STREAMGAGE INSTALLATION DATE 11/10/1987 ‐ WY 1988 AVAILABLE PERIOD OF RECORD (POR) 11/10/1987 ‐ Current LENGTH OF AVAILABLE POR DATA 32.89 Years | 12,014 Days DATA GAPS IN POR None STAGE GAGE ELEVATION ‐0.25 feet Gage Height STAFF GAGES 8 ZERO GAGE HEIGHT ELEVATION 1,687.54 feet NAVD88 POINT OF ZERO FLOW (GATED OUTLET) 0.0 feet Gage Height POINT OF ZERO FLOW (UNGATED OUTLET) 15.6 feet Gage Height SPILLWAY ELEVATION 26.8 feet Gage Height TOP OF DAM ELEVATION 37.0 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 741 Watershed Map Signal Butte FRS - water year peaks Volume (acre-feet) 350 300 250 200 150 100 50 0 1985 1990 1995 2000 2005 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 742 2010 2015 2020 2025 WY2020 Events Date of Peak 11/21/2019 11/29/2019 12/25/2019 03/13/2020 Peak Gage Height (feet) 1.90 3.86 2.38 0.33 Peak Volume (ac‐ft) 2.0 16.0 4.0 0.0 Hydrograph of peak WY 2020 impoundment event, 11/29/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 743 Percent Spillway Capacity 0.2 1.0 0.3 0.0 Signal Butte FRS, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 --5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 744 Signal Butte FRS, volume data Volume, in acre feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 107 11 2 90 10 3 74 13 4 62 --5 51 6 37 7 33 8 30 9 27 10 26 11 22 12 19 13 17 14 15 15 13 16 11 17 9 18 7 19 6 20 4 21 2 22 23 24 25 2 26 2 27 28 29 10 30 --31 ---------------------------------------------------------------------------------------MEAN 22 1 2 0 0 0 0 0 0 0 0 0 MAX 114 16 13 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 2 MAX 114 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 745 Signal Butte FRS, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 8.5 -0.2 3.4 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 2 8.0 -0.2 3.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 3 7.4 -0.2 3.6 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 4 6.8 -0.2 --- -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 5 6.3 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 6 5.5 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 7 5.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 8 5.0 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 9 4.8 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 10 4.7 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 11 4.4 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 12 4.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 13 4.0 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 14 3.7 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 15 3.5 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 16 3.4 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 17 3.1 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 18 2.9 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 19 2.8 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 20 2.5 0.1 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 21 1.6 0.4 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 22 0.2 0.4 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 23 -0.0 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 24 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 25 -0.2 -0.2 1.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 26 -0.2 -0.2 2.1 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 27 -0.2 -0.2 0.1 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 28 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 29 -0.2 2.7 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 30 -0.2 0.0 -0.2 -0.2 --- -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 31 -0.2 --- -0.2 -0.2 --- -0.2 --- -0.2 --- -0.2 -0.2 -------------------------------------------------------------------------------MEAN 3.1 0.0 0.4 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 MAX 8.8 3.9 3.6 -0.2 -0.2 0.3 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 MIN -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.12 MAX 8.75 MIN -0.25 FCDMC Annual Surface Water Report, Water Year 2020 Page 746 Siphon Draw Wash at Signal Butte Road, ID #37607 Site Data LOCATION Located north of Elliot Road on Signal Butte Road DRAINAGE AREA 2.37 mi2 STREAM TYPE Natural Stream at a Culvert JURISDICTION Mesa, Arizona WATERSHED Upper East Maricopa Floodway SECTION/TOWNSHIP/RANGE S12 T1S R7E LATITUDE N 33° 21' 06.1" | +33.35169 LONGITUDE W 111° 36' 03.2" | ‐111.60090 STREAMGAGE INSTALLATION DATE 12/22/2016 ‐ WY 2017 AVAILABLE PERIOD OF RECORD (POR) 12/22/2016 ‐ Current LENGTH OF AVAILABLE POR DATA 3.78 Years | 1,379 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.65 feet Gage Height STAFF GAGES None CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,460.50 feet NAVD88 POINT OF ZERO FLOW 0.1 feet Gage Height EXTREME FOR PERIOD OF RECORD 312 cfs | 4.46 feet Gage Height | 07/24/2016 FCDMC Annual Surface Water Report, Water Year 2020 Page 747 Watershed Map Siphon Draw Wash - water year peaks 400 Discharge (cfs) 350 300 250 200 150 100 50 0 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 748 2025 WY2020 Events Date of Peak 11/05/2019 11/20/2019 11/21/2019 11/29/2019 12/25/2019 Peak Gage Height 0.75 0.96 1.27 1.40 0.96 Peak Discharge (cfs) 8 17 38 48 17 Hydrograph of peak WY 2020 flow event, 11/29/2019 Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 749 Siphon Draw Wash at Signal Butte Road, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 18 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 18 0 0 0 0 0 0 0 0 0 0 MEAN 0 1 0 0 0 0 0 0 0 0 0 0 MAX 0 198 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 35 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 18 MEAN 0 MAX 198 MIN 0 AC_FT 35 FCDMC Annual Surface Water Report, Water Year 2020 Page 750 Skunk Creek near New River, ID #66207 Site Data LOCATION Located south of the Fig Spring Road crossing of Skunk Creek DRAINAGE AREA 3.92 mi2 STREAM TYPE Natural Stream JURISDICTION Maricopa County, Arizona WATERSHED Skunk Creek SECTION/TOWNSHIP/RANGE S29 T7N R3E LATITUDE N 33° 55' 34.3" | +33.92619 LONGITUDE W 112° 04' 57.7" | ‐112.08268 STREAMGAGE INSTALLATION DATE 06/21/1995 ‐ WY 1995 AVAILABLE PERIOD OF RECORD (POR) 06/21/1995 ‐ Current LENGTH OF AVAILABLE POR DATA 25.28 Years | 9,234 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 1.45 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 2,188.01 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 3,021 cfs | 5.01 feet | 09/23/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 751 Watershed Map Skunk Creek near New River - water year peaks 3,500 Discharge (cfs) 3,000 2,500 2,000 1,500 1,000 500 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 752 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No runoff recorded in Water Year 2020. Flood Flow Frequency Flood Flow Frequency N=26, HEC‐WRC computation (based on 26 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 215 783 1,370 2,060 3,080 3,900 50‐year 100‐year 2,500 3,650 NOTE(1): These results are based on very limited data. Flood Flow Frequency FEMA 2‐year 5‐year 10‐year 1,730 FCDMC Annual Surface Water Report, Water Year 2020 Page 753 20‐year Skunk Creek near New River, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 754 Skunk Creek at Desert Hills Drive, ID #64807 Site Data LOCATION Located at approximately 15th Avenue and Desert Hills Drive DRAINAGE AREA 40.8 mi2 STREAM TYPE Natural Stream JURISDICTION Anthem, Arizona WATERSHED Skunk Creek SECTION/TOWNSHIP/RANGE S19 T6N R3E LATITUDE N 33° 50' 34.2" | +33.84283 LONGITUDE W 112° 05' 31.9" | ‐112.09221 STREAMGAGE INSTALLATION DATE 07/23/2015 ‐ WY 2015 AVAILABLE PERIOD OF RECORD (POR) 07/23/2015 ‐ Current LENGTH OF AVAILABLE POR DATA 5.19 Years | 1,897 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 1.10 feet Gage Height STAFF GAGES None CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,847.67 feet NAVD88 POINT OF ZERO FLOW 0.5 feet Gage Height EXTREME FOR PERIOD OF RECORD 2,476 cfs | 4.11 feet GH | 09/23/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 755 Watershed Map Skunk Creek at Desert Hills Drive - water year peaks 3,000 Discharge (cfs) 2,500 2,000 1,500 1,000 500 0 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 756 2025 WY2020 Events Date of Peak 11/20/2019 11/21/2019 11/21/2019 11/29/2019 03/12/2020 03/13/2020 Peak Gage Height 3.17 1.58 1.69 2.45 1.76 1.57 Peak Discharge (cfs) 1,370 142 181 632 209 137 Hydrograph of peak WY 2020 flow event, 11/20/2019 Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 757 Skunk Creek at Desert Hills Drive, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 --2 3 ----4 5 6 7 8 9 --10 11 12 --23 13 26 14 --15 ----16 17 18 19 20 105 21 37 22 15 23 24 25 26 27 28 29 100 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 257 0 0 0 49 0 0 0 0 0 0 MEAN 0 9 0 0 0 2 0 0 0 0 0 0 MAX 0 1370 0 0 0 209 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 509 0 0 0 97 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 306 MEAN 1 MAX 1370 MIN 0 AC_FT 606 FCDMC Annual Surface Water Report, Water Year 2020 Page 758 Skunk Creek at Carefree Highway, ID #65707 Site Data LOCATION Located on the westbound Carefree Highway bridge about 1/4 mile east of I‐17 DRAINAGE AREA 48.8 mi2 STREAM TYPE Natural Stream JURISDICTION Phoenix, Arizona WATERSHED Skunk Creek SECTION/TOWNSHIP/RANGE S02 T5N R2E LATITUDE N 33° 47' 54.6" | +33.79849 LONGITUDE W 112° 07' 23.1" | ‐112.12309 STREAMGAGE INSTALLATION DATE 08/19/2015 ‐ WY 2015 AVAILABLE PERIOD OF RECORD (POR) 08/19/2015 ‐ Current LENGTH OF AVAILABLE POR DATA 5.12 Years | 1,870 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 1.49 feet Gage Height STAFF GAGES None CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,672.86 feet NAVD88 POINT OF ZERO FLOW 0.2 feet Gage Height EXTREME FOR PERIOD OF RECORD 2,455 cfs | 4.55 feet GH | 09/23/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 759 Watershed Map Skunk Creek at Carefree Highway - water year peaks 3,000 Discharge (cfs) 2,500 2,000 1,500 1,000 500 0 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 760 2025 WY2020 Events Date of Peak 11/20/2019 11/20/2019 11/21/2019 11/29/2019 03/12/2020 03/13/2020 03/13/2020 Peak Gage Height 3.80 4.50 3.28 4.18 3.01 3.18 2.93 Peak Discharge (cfs) 1,715 3,193 1,051 2,418 775 944 710 Hydrograph of peak WY 2020 flow event, 11/20/2019 Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 761 Skunk Creek at Carefree Highway, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 129 13 542 14 99 15 16 17 18 19 20 532 21 376 22 152 23 24 25 26 27 28 29 539 30 36 --31 ---------------------------------------------------------------------------------------TOTAL 0 1635 0 0 0 770 0 0 0 0 0 0 MEAN 0 54 0 0 0 25 0 0 0 0 0 0 MAX 0 3193 0 0 0 944 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 3242 0 0 0 1527 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 2405 MEAN 7 MAX 3193 MIN 0 AC_FT 4770 FCDMC Annual Surface Water Report, Water Year 2020 Page 762 Skunk Creek at Dixileta Drive, ID #64907 Site Data LOCATION Located on Dixileta Drive about 1/4 mile east of I‐17 DRAINAGE AREA 50 mi2 STREAM TYPE Natural Stream JURISDICTION Phoenix, Arizona WATERSHED Skunk Creek SECTION/TOWNSHIP/RANGE S23 T5N R2E LATITUDE N 33° 45' 24.3" | +33.75676 LONGITUDE W 112° 07' 20.0" | ‐112.12222 STREAMGAGE INSTALLATION DATE 01/11/2016 ‐ WY 2016 AVAILABLE PERIOD OF RECORD (POR) 01/11/2016 ‐ Current LENGTH OF AVAILABLE POR DATA 4.72 Years | 1,725 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 2.20 feet Gage Height STAFF GAGES None CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,543.52 feet NAVD88 POINT OF ZERO FLOW 0.5 feet Gage Height EXTREME FOR PERIOD OF RECORD 1,947 cfs | 4.84 feet GH | 09/23/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 763 Watershed Map Discharge (cfs) Skunk Creek at Dixileta Drive - water year peaks 2,000 1,800 1,600 1,400 1,200 1,000 800 600 400 200 0 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 764 2025 WY2020 Events Date of Peak 11/20/2019 11/20/2019 11/29/2019 Peak Gage Height 2.92 3.94 3.54 Peak Discharge (cfs) 927 1,394 1,196 Hydrograph of peak WY 2020 flow event, 11/20/2019 Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 765 Skunk Creek at Dixileta Drive, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 230 21 22 23 24 25 26 27 28 29 154 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 384 0 0 0 0 0 0 0 0 0 0 MEAN 0 13 0 0 0 0 0 0 0 0 0 0 MAX 0 1394 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 763 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 384 MEAN 1 MAX 1394 MIN 0 AC_FT 763 FCDMC Annual Surface Water Report, Water Year 2020 Page 766 Skunk Creek at I‐17, ID #65807 Site Data LOCATION Located south of Jomax Road on I‐17 DRAINAGE AREA 64.7 mi2 STREAM TYPE Channelized Natural Stream JURISDICTION Phoenix, Arizona WATERSHED Skunk Creek SECTION/TOWNSHIP/RANGE S35 T5N R2E LATITUDE N 33° 43' 48.3" | +33.73007 LONGITUDE W 112° 07' 11.1" | ‐112.11976 STREAMGAGE INSTALLATION DATE 10/26/1989 ‐ WY 1990 AVAILABLE PERIOD OF RECORD (POR) 08/11/1990 ‐ Current LENGTH OF AVAILABLE POR DATA 30.14 Years | 11,009 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 1.23 feet Gage Height STAFF GAGES 2 CREST STAGE GAGES 4 ZERO GAGE HEIGHT ELEVATION 1,473.97 feet NAVD88 POINT OF ZERO FLOW 1.0 feet gage height EXTREME FOR PERIOD OF RECORD 13,900 cfs | 6.80 feet | 08/19/2014 EXTREME OUTSIDE PERIOD OF RECORD 11,500 cfs | 10.48 feet | 08/01/1964 FCDMC Annual Surface Water Report, Water Year 2020 Page 767 Watershed Map Skunk Creek at I-17 - water year peaks 16,000 14,000 12,000 10,000 8,000 6,000 4,000 2,000 0 1990 1995 2000 FCDMC Annual Surface Water Report, Water Year 2020 Page 768 2005 2010 2015 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/29/2019 03/11/2020 03/13/2020 Peak Gage Height (feet) 2.67 2.47 1.47 1.68 Peak Discharge (cfs) 1,835 1,500 305 467 Hydrograph of peak WY 2020 flow event, 11/20/2019 Flood Flow Frequency Flood Flow Frequency N=61, HEC‐WRC computation (based on 61 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 872 3,610 6,850 11,100 18,000 24,300 NOTE(1): These results are based on available data. FCDMC Annual Surface Water Report, Water Year 2020 Page 769 Skunk Creek at I‐17, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 9 12 1 13 29 14 15 16 17 18 19 20 226 21 92 22 23 24 25 26 27 28 29 321 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 639 0 0 0 39 0 0 0 0 0 0 MEAN 0 21 0 0 0 1 0 0 0 0 0 0 MAX 0 1835 0 0 0 467 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 1267 0 0 0 77 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 677 MEAN 2 MAX 1835 MIN 0 AC_FT 1343 FCDMC Annual Surface Water Report, Water Year 2020 Page 770 Skunk Tank Wash, ID #64707 Site Data LOCATION Located on 7th Avenue about 1/4 mile south of Desert Hills Drive DRAINAGE AREA 1.5 mi2 STREAM TYPE Culvert on natural stream JURISDICTION Maricopa County, Arizona WATERSHED Skunk Creek SECTION/TOWNSHIP/RANGE S29 T6N R3E LATITUDE N 33° 50' 23.8" | +33.83995 LONGITUDE W 112° 04' 57.8" | ‐112.08271 STREAMGAGE INSTALLATION DATE 03/02/2006 ‐ WY 2006 AVAILABLE PERIOD OF RECORD (POR) 03/02/2006 ‐ Current LENGTH OF AVAILABLE POR DATA 14.58 Years | 5,327 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.50 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,854.82 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 277 cfs | 7.20 feet | 08/19/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 771 Watershed Map Skunk Tank Wash - water year peaks 300 Discharge (cfs) 250 200 150 100 50 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 772 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/29/2019 03/12/2020 03/13/2020 03/13/2020 03/18/2020 Peak Gage Height (feet) 1.86 3.47 1.18 1.52 2.06 1.57 Peak Discharge (cfs) 25 103 14 19 32 20 Hydrograph of peak WY 2020 flow event, 11/29/2019 Flood Flow Frequency Flood Flow Frequency N=15, HEC‐WRC computation (based on 15 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 100 323 494 647 812 910 FCDMC Annual Surface Water Report, Water Year 2020 Page 773 Skunk Tank Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 1 4 5 6 7 8 9 10 11 12 1 13 7 14 15 16 17 18 3 19 20 6 1 21 22 23 24 25 26 27 28 29 7 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 12 0 0 0 10 0 3 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 103 0 0 0 32 0 5 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 25 0 0 0 21 0 5 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 26 MEAN 0 MAX 103 MIN 0 AC_FT 51 FCDMC Annual Surface Water Report, Water Year 2020 Page 774 Sols Wash at SR71, ID #47707 Site Data LOCATION Located 1/2 mile west of US93 on SR71 DRAINAGE AREA 0.89 mi2 STREAM TYPE Natural Stream JURISDICTION Yavapai County, Arizona WATERSHED Lower Hassayampa SECTION/TOWNSHIP/RANGE S14 T9N R7W LATITUDE N 34° 07' 06.7" | +34.11853 LONGITUDE W 112° 57' 45.8" | ‐112.96272 STREAMGAGE INSTALLATION DATE 09/12/2001 ‐ WY 2001 AVAILABLE PERIOD OF RECORD (POR) 09/12/2001 ‐ Current LENGTH OF AVAILABLE POR DATA 19.05 Years | 6,959 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.10 feet Gage Height STAFF GAGES 1 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 2,737.60 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 608 cfs | 2.59 feet | 06/16/2018 FCDMC Annual Surface Water Report, Water Year 2020 Page 775 Watershed Map Sols Wash at SR71 - water year peaks 700 Discharge (cfs) 600 500 400 300 200 100 0 2000 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 776 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No runoff recorded during Water Year 2020 Flood Flow Frequency Flood Flow Frequency N=19, HEC‐WRC computation (based on 19 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 151 366 481 560 624 653 NOTE: These results are based on very limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 777 Sols Wash at SR71, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 --13 --14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 778 Sols Tributary at US93, ID #50007 Site Data LOCATION Located west of US93 near mile post 191 DRAINAGE AREA 0.15 mi2 STREAM TYPE Natural Stream JURISDICTION Yavapai County, Arizona WATERSHED Lower Hassayampa SECTION/TOWNSHIP/RANGE S11 T8N R6W LATITUDE N 34° 03' 06.8" | +34.05187 LONGITUDE W 112° 51' 01.1" | ‐112.85030 STREAMGAGE INSTALLATION DATE 01/30/2002 ‐ WY 2002 AVAILABLE PERIOD OF RECORD (POR) 01/30/2002 ‐ Current LENGTH OF AVAILABLE POR DATA 18.67 Years | 6819 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.07 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 2,576.30 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 967 cfs | 3.40 feet | 07/25/2007 FCDMC Annual Surface Water Report, Water Year 2020 Page 779 Watershed Map Sols Wash Tributary at US93 - water year peaks 1,200 Discharge (cfs) 1,000 800 600 400 200 0 2000 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 780 2020 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No runoff recorded in Water Year 2020. Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 781 Sols Tributary near US93, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 --14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 782 Sols Wash near Matthie, ID #50807 Site Data LOCATION Located along the railroad about 1 mile west of Vulture Mine Road DRAINAGE AREA 121 mi2 STREAM TYPE Natural Stream JURISDICTION Wickenburg, Arizona WATERSHED Lower Hassayampa SECTION/TOWNSHIP/RANGE S32 T8N R5W LATITUDE N 33° 59' 14.8" | +33.98743 LONGITUDE W 112° 47' 34.7" | ‐112.79296 STREAMGAGE INSTALLATION DATE 08/04/1995 ‐ WY 1995 AVAILABLE PERIOD OF RECORD (POR) 08/04/1995 ‐ Current LENGTH OF AVAILABLE POR DATA 25.16 Years | 9,190 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.36 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 2,230.54 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 10,792 cfs | 5.15 feet | 10/21/2000 FCDMC Annual Surface Water Report, Water Year 2020 Page 783 Watershed Map Sols Wash near Matthie - water year peaks 12,000 Discharge (cfs) 10,000 8,000 6,000 4,000 2,000 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 784 2015 2020 2025 WY2020 Events Date of Peak 11/21/2019 11/29/2019 03/12/2020 03/13/2020 Peak Gage Height (feet) 1.99 1.79 1.29 1.21 Peak Discharge (cfs) 710 451 91 82 Hydrograph of peak WY 2020 flow event, 11/21/2019 Flood Flow Frequency Flood Flow Frequency N=26, HEC‐WRC computation (based on 26 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 606 2,040 4,160 7,780 16,500 27,900 NOTE: These results are based on limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 785 Sols Wash near Matthie, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 --7 8 --9 10 --11 12 --8 13 ----24 14 --15 16 --17 18 19 20 27 21 50 22 15 23 24 --25 26 27 --28 29 87 --30 --31 ---------------------------------------------------------------------------------------TOTAL 0 179 0 0 0 32 0 0 0 0 0 0 MEAN 0 6 0 0 0 1 0 0 0 0 0 0 MAX 0 710 0 0 0 91 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 355 0 0 0 63 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 211 MEAN 1 MAX 710 MIN 0 AC_FT 418 FCDMC Annual Surface Water Report, Water Year 2020 Page 786 Sonoqui Wash near Hawes Road, ID #36307 Site Data LOCATION Located near Hawes and Riggs Roads DRAINAGE AREA 15.0 mi2 STREAM TYPE Channelized Natural Stream JURISDICTION Queen Creek, Arizona WATERSHED Upper East Maricopa Floodway SECTION/TOWNSHIP/RANGE S29 T2S R7E LATITUDE N 33° 13' 26.5" | +33.22402 LONGITUDE W 111° 39' 11.8" | ‐111.65327 STREAMGAGE INSTALLATION DATE 12/21/2016 ‐ WY 2017 AVAILABLE PERIOD OF RECORD (POR) 12/21/2016 ‐ Current LENGTH OF AVAILABLE POR DATA 3.78 Years | 1,380 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 1.40 feet Gage Height STAFF GAGES None CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,373.00 NAVD88 POINT OF ZERO FLOW 0.8 feet Gage Height EXTREME FOR PERIOD OF RECORD 1,064 cfs | 5.29 feet Gage Height | 07/24/2016 FCDMC Annual Surface Water Report, Water Year 2020 Page 787 Watershed Map Sonoqui Wash near Hawes Road - water year peaks 1,200 Discharge (cfs) 1,000 800 600 400 200 0 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 788 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) 11/29/2019 2.69 198 Hydrograph of peak WY 2020 flow event, 11/29/2019 Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 789 Siphon Draw Wash at Signal Butte Road, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 1 2 3 4 5 1 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 5 21 15 22 3 23 24 25 4 26 27 28 29 13 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 38 4 0 0 0 1 0 0 0 0 0 MEAN 0 1 0 0 0 0 0 0 0 0 0 0 MAX 0 48 17 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 75 9 0 0 0 3 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 44 MEAN 0 MAX 48 MIN 0 AC_FT 87 FCDMC Annual Surface Water Report, Water Year 2020 Page 790 Sonoran Wash, ID #65907 Site Data LOCATION Located southeast of Paloma Pkwy and Sonoran Desert Drive DRAINAGE AREA 7.81 mi2 STREAM TYPE Natural Stream JURISDICTION Phoenix, Arizona WATERSHED Skunk Creek SECTION/TOWNSHIP/RANGE S19 T5N R3E LATITUDE N 33° 46' 09.3" | +33.76925 LONGITUDE W 112° 05' 55.6" | ‐112.09878 STREAMGAGE INSTALLATION DATE 10/13/2015 ‐ WY 2016 AVAILABLE PERIOD OF RECORD (POR) 10/13/2015 ‐ Current LENGTH OF AVAILABLE POR DATA 4.97 Years | 1,815 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 1.34 feet Gage Height STAFF GAGES None CREST STAGE GAGES None ZERO GAGE HEIGHT ELEVATION 1,574.85 feet NAVD88 POINT OF ZERO FLOW 0.3 feet Gage Height EXTREME FOR PERIOD OF RECORD 1,192 cfs | 4.30 feet GH | 12/22/2016 FCDMC Annual Surface Water Report, Water Year 2020 Page 791 Watershed Map Sonoran Wash - water year peaks 1,400 Discharge (cfs) 1,200 1,000 800 600 400 200 0 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 792 2025 WY2020 Events Date of Peak 11/20/2019 11/29/2019 Peak Gage Height 2.28 2.08 Peak Discharge (cfs) 139 110 Hydrograph of peak WY 2020 flow event, 11/20/2019 Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 793 Sonoran Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 11 21 22 23 24 25 26 27 28 29 8 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 19 0 0 0 0 0 0 0 0 0 0 MEAN 0 1 0 0 0 0 0 0 0 0 0 0 MAX 0 139 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 37 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 19 MEAN 0 MAX 139 MIN 0 AC_FT 37 FCDMC Annual Surface Water Report, Water Year 2020 Page 794 South Mountain Fan, ID #70507 Site Data LOCATION Located in the western part of South Mountain Park DRAINAGE AREA 2.1 mi2 STREAM TYPE Natural Stream JURISDICTION Phoenix, Arizona WATERSHED Middle Gila SECTION/TOWNSHIP/RANGE S26 T1S R2E LATITUDE N 33° 18' 54.7" | +33.31518 LONGITUDE W 112° 08' 01.3" | ‐112.13369 STREAMGAGE INSTALLATION DATE 06/09/1993 ‐ WY 1993 AVAILABLE PERIOD OF RECORD (POR) 06/09/1993 ‐ Current LENGTH OF AVAILABLE POR DATA 27.31 Years | 9,976 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 1.05 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,276.61 feet NAVD88 POINT OF ZERO FLOW 0.5 feet Gage Height EXTREME FOR PERIOD OF RECORD 1,586 cfs | 3.85 feet | 08/12/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 795 Watershed Map South Mountain Fan - water year peaks 1,800 Discharge (cfs) 1,600 1,400 1,200 1,000 800 600 400 200 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 796 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No recorded flow during Water Year 2020 Flood Flow Frequency Flood Flow Frequency HEC‐1 Analysis 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 300 650 990 1,500 2,000 2,400 FCDMC Annual Surface Water Report, Water Year 2020 Page 797 South Mountain Fan, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 798 Spookhill FRS, ID #74707 Site Data LOCATION Located near Loop 202 and Power Road DRAINAGE AREA 13.6 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Mesa, Arizona WATERSHED Lower Verde SECTION/TOWNSHIP/RANGE S31 T2N R7E LATITUDE N 33° 28' 23.0" | +33.47305 LONGITUDE W 111° 40' 52.7" | ‐111.68131 STREAMGAGE INSTALLATION DATE 03/13/1984 ‐ WY 1984 AVAILABLE POR 12/30/1987 ‐ Current LENGTH OF AVAILABLE POR DATA 32.76 Years | 11,964 Days DATA GAPS IN POR 05/02/2008 ‐ 06/22/2008 STAGE GAGE ELEVATION 0.28 Feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,568.10 Feet NAVD88 NORMAL DRAWDOWN RATE ‐0.12 feet per hour PZF (GATED OUTLET) 0.0 Feet Gage Height PZF (UNGATED OUTLET) 9.4 Feet Gage Height MINIMUM LEVEL POOL ELEVATION 3.7 feet at Brown Rd, 2.2 feet at McKellips Rd, 1.0 feet at McDowell Rd MINIMUM FREEWAY LEVEE ELEVATION 14.0 feet Gage Height SPILLWAY ELEVATION 15.8 feet Gage Height TOP OF DAM ELEVATION 25.3 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 799 Watershed Map Spookhill FRS - water year peaks Volume (acre-feet) 250 200 150 100 50 0 1985 1990 1995 2000 2005 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 800 2010 2015 2020 2025 WY2020 Events Date of Peak 11/21/2019 11/29/2019 12/25/2019 02/23/2020 03/11/2020 03/13/2020 03/18/2020 08/17/2020 Peak Gage Height (feet) 2.07 4.19 2.54 2.57 2.29 2.09 3.07 0.77 Peak Volume (ac‐ft) 1.6 37.7 4.7 5.0 2.7 1.7 11.7 0.0 Hydrograph of peak WY 2020 impoundment event, 11/29/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 801 Percent Spillway Capacity 0.1 1.4 0.2 0.2 0.1 0.1 0.4 0.0 Spookhill FRS, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 37 2 32 3 5 4 --5 6 7 --8 --9 --10 11 13 12 21 13 26 14 25 15 23 16 12 17 18 7 19 20 20 9 21 18 22 8 10 23 30 24 9 25 15 26 23 27 23 28 18 29 28 4 30 38 --31 ---------------------------------------------------------------------------------------TOTAL 0 102 157 0 50 147 0 0 0 0 0 0 MEAN 0 3 5 0 2 5 0 0 0 0 0 0 MAX 0 40 38 0 31 34 0 0 0 0 2 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 202 311 0 99 291 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 455 MEAN 1 MAX 40 MIN 0 AC_FT 903 FCDMC Annual Surface Water Report, Water Year 2020 Page 802 Spookhill FRS, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 24 2 11 3 4 --5 6 7 --8 --9 --10 11 1 12 1 13 1 14 1 15 16 17 18 2 19 4 20 21 22 1 23 4 24 1 25 2 26 1 27 28 29 21 30 29 --31 ---------------------------------------------------------------------------------------MEAN 0 2 1 0 0 0 0 0 0 0 0 0 MAX 0 38 27 0 5 12 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 38 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 803 Spookhill FRS, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.3 0.3 3.7 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 2 0.3 0.3 2.8 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 3 0.3 0.3 0.7 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 4 0.3 0.3 0.6 0.3 0.3 0.3 0.3 0.3 0.3 --0.3 0.3 5 0.3 0.3 0.4 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 7 0.3 0.3 0.3 0.3 --0.3 0.3 0.3 0.3 0.3 0.3 0.3 8 0.3 0.3 0.3 0.3 --0.3 0.3 0.3 0.3 0.3 0.3 0.3 9 0.3 0.3 0.3 0.3 --0.3 0.3 0.3 0.3 0.3 0.3 0.3 10 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 11 0.3 0.3 0.3 0.3 0.3 1.2 0.3 0.3 0.3 0.3 0.3 0.3 12 0.3 0.3 0.3 0.3 0.3 1.5 0.3 0.3 0.3 0.3 0.3 0.3 13 0.3 0.3 0.3 0.3 0.3 1.8 0.3 0.3 0.3 0.3 0.3 0.3 14 0.3 0.3 0.3 0.3 0.3 1.8 0.3 0.3 0.3 0.3 0.3 0.3 15 0.3 0.3 0.3 0.3 0.3 1.6 0.3 0.3 0.3 0.3 0.3 0.3 16 0.3 0.3 0.3 0.3 0.3 0.9 0.3 0.3 0.3 0.3 0.3 0.3 17 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 18 0.3 0.3 0.3 0.3 0.3 0.8 0.3 0.3 0.3 0.3 0.3 0.3 19 0.3 0.3 0.3 0.3 0.3 1.9 0.3 0.3 0.3 0.3 0.3 0.3 20 0.3 0.9 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 21 0.3 1.4 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 22 0.3 0.9 0.3 0.3 1.0 0.3 0.3 0.3 0.3 0.3 0.3 0.3 23 0.3 0.4 0.3 0.3 2.5 0.3 0.3 0.3 0.3 0.3 0.3 0.3 24 0.3 0.3 0.3 0.3 0.9 0.3 0.3 0.3 0.3 0.3 0.3 0.3 25 0.3 0.3 1.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 26 0.3 0.3 1.6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 27 0.3 0.3 1.5 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 28 0.3 0.3 1.1 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 29 0.3 2.9 0.6 0.3 0.3 0.0 0.3 0.3 0.3 0.3 0.3 0.3 30 0.3 3.9 0.3 0.3 --0.3 0.3 0.3 0.3 0.3 0.3 0.3 31 0.3 --0.3 0.3 --0.3 --0.3 --0.3 0.3 -------------------------------------------------------------------------------MEAN 0.3 0.6 0.6 0.3 0.4 0.6 0.3 0.3 0.3 0.3 0.3 0.3 MAX 0.3 4.2 3.8 0.3 2.6 3.1 0.3 0.3 0.3 0.3 0.8 0.3 MIN 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.37 MAX 4.19 MIN 0.28 FCDMC Annual Surface Water Report, Water Year 2020 Page 804 Spookhill FRS at McDowell Road, ID #80007 Site Data LOCATION Located at McDowell Road and the Loop 202 DRAINAGE AREA 13.6 mi2 at outlet gage STREAM TYPE Engineered Channel / Levee / Dam JURISDICTION Mesa, Arizona WATERSHED Lower Verde SECTION/TOWNSHIP/RANGE S06 T1N R7E LATITUDE N 33° 27' 57.4" | +33.46594 LONGITUDE W 111° 40' 42.0" | ‐111.67834 STREAMGAGE INSTALLATION DATE 06/19/2008 ‐ WY 2008 AVAILABLE PERIOD OF RECORD (POR) 06/19/2008 ‐ Current LENGTH OF AVAILABLE POR DATA 12.28 Years | 4,487 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.00 feet Gage Height STAFF GAGES None ZERO GAGE HEIGHT ELEVATION 1,569.19 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height DAM ELEVATIONS AS RELATED TO GAGE HEIGHT AT THIS SITE PRINCIPAL OUTLET ELEVATION ‐1.09 feet Gage Height UNGATED PRINICPAL OUTLET INLET ELEV 8.31 feet Gage Height MINIMUM FREEWAY LEVEE ELEVATION 12.91 feet Gage Height SPILLWAY ELEVATION 14.71 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 805 Watershed Map Spookhill FRS at McDowell Road - water year peaks Volume (acre-feet) 250 200 150 100 50 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 806 2020 2025 WY2020 Events Date of Peak 11/21/2019 11/29/2019 12/09/2019 12/26/2019 02/23/2020 03/11/2020 03/19/2020 Peak Gage Height (feet) 0.59 2.46 2.39 0.89 0.94 0.94 1.49 Peak Volume (ac‐ft) 1.4 28.6 26.8 3.2 3.6 3.6 9.3 Hydrograph of peak WY 2020 impoundment event, 11/29/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 807 Percent Spillway Capacity 0.0 0.5 0.5 0.1 0.1 0.1 0.2 Spookhill FRS at McDowell Road, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 36 2 32 3 9 4 5 6 7 --8 --9 14 --10 32 11 14 13 12 15 13 14 15 16 17 18 8 19 27 20 7 12 21 19 6 22 18 9 4 23 8 29 24 5 19 25 4 15 7 26 1 21 7 27 12 6 28 29 28 30 37 --1 31 --------1 -------------------------------------------------------------------------------TOTAL 0 128 185 0 76 85 0 0 0 0 2 0 MEAN 0 4 6 0 3 3 0 0 0 0 0 0 MAX 0 38 38 0 29 33 0 0 0 0 3 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 253 367 0 151 168 0 0 0 0 4 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 475 MEAN 1 MAX 38 MIN 0 AC_FT 943 FCDMC Annual Surface Water Report, Water Year 2020 Page 808 Spookhill FRS at McDowell Road, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 20 2 9 3 4 5 6 7 --8 --9 8 --10 10 11 1 1 12 1 13 14 15 16 17 18 1 19 4 20 1 21 1 22 1 23 3 24 1 25 1 26 2 27 1 28 29 18 30 25 --31 ---------------------------------------------------------------------------------------MEAN 0 2 2 0 0 0 0 0 0 0 0 0 MAX 0 29 27 0 4 9 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 29 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 809 Spookhill FRS at McDowell Road, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.0 0.0 2.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2 0.0 0.0 1.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3 0.0 0.0 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 7 0.0 0.0 0.0 0.0 --0.0 0.0 0.0 0.0 0.0 0.0 0.0 8 0.0 0.0 0.0 0.0 --0.0 0.0 0.0 0.0 0.0 0.0 0.0 9 0.0 0.0 0.8 0.0 --0.0 0.0 0.0 0.0 0.0 0.0 0.0 10 0.0 0.0 1.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 11 0.0 0.0 0.4 0.0 0.0 0.3 0.0 0.0 0.0 0.0 0.0 0.0 12 0.0 0.0 0.0 0.0 0.0 0.4 0.0 0.0 0.0 0.0 0.0 0.0 13 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 14 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 15 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 16 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 17 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 18 0.0 0.0 0.0 0.0 0.0 0.3 0.0 0.0 0.0 0.0 0.0 0.0 19 0.0 0.0 0.0 0.0 0.0 0.9 0.0 0.0 0.0 0.0 0.0 0.0 20 0.0 0.2 0.0 0.0 0.0 0.3 0.0 0.0 0.0 0.0 0.0 0.0 21 0.0 0.5 0.0 0.0 0.0 0.2 0.0 0.0 0.0 0.0 0.0 0.0 22 0.0 0.4 0.0 0.0 0.2 0.2 0.0 0.0 0.0 0.0 0.0 0.0 23 0.0 0.3 0.0 0.0 0.9 0.0 0.0 0.0 0.0 0.0 0.0 0.0 24 0.0 0.2 0.0 0.0 0.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 25 0.0 0.1 0.4 0.0 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 26 0.0 0.1 0.6 0.0 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 27 0.0 0.0 0.3 0.0 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 28 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 29 0.0 1.7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 30 0.0 2.3 0.0 0.0 --0.0 0.0 0.0 0.0 0.0 0.1 0.0 31 0.0 --0.0 0.0 --0.0 --0.0 --0.0 0.0 -------------------------------------------------------------------------------MEAN 0.0 0.2 0.2 0.0 0.1 0.1 0.0 0.0 0.0 0.0 0.0 0.0 MAX 0.0 2.5 2.4 0.0 0.9 1.5 0.0 0.0 0.0 0.0 0.1 0.0 MIN 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.05 MAX 2.46 MIN 0.00 FCDMC Annual Surface Water Report, Water Year 2020 Page 810 Spookhill FRS at McKellips Road, ID #79807 Site Data LOCATION Located at McKellips Road and the Loop 202 DRAINAGE AREA 13.6 mi2 at outlet gage STREAM TYPE Engineered Channel / Levee / Dam JURISDICTION Mesa, Arizona WATERSHED Lower Verde SECTION/TOWNSHIP/RANGE S07 T1N R7E LATITUDE N 33° 27' 04.7" | +33.45131 LONGITUDE W 111° 40' 03.4" | ‐111.66761 STREAMGAGE INSTALLATION DATE 06/19/2008 ‐ WY 2008 AVAILABLE PERIOD OF RECORD (POR) 06/19/2008 ‐ Current LENGTH OF AVAILABLE POR DATA 12.28 Years | 4,487 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.25 feet Gage Height STAFF GAGES None ZERO GAGE HEIGHT ELEVATION 1,570.22 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height DAM ELEVATIONS AS RELATED TO GAGE HEIGHT AT THIS SITE PRINCIPAL OUTLET ELEVATION ‐2.12 feet Gage Height UNGATED PRINCIPAL OUTLET INLET ELEV 7.28 feet Gage Height MINIMUM FREEWAY LEVEE ELEVATION 11.88 feet Gage Height SPILLWAY ELEVATION 13.68 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 811 Watershed Map Spookhill FRS at McKellips Road - water year peaks Volume (acre-feet) 250 200 150 100 50 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 812 2020 2025 WY2020 Events Date of Peak 11/21/2019 11/29/2019 12/09/2019 12/25/2019 02/22/2020 02/23/2020 03/11/2020 03/18/2020 Peak Gage Height (feet) 0.67 1.79 1.22 0.59 0.57 0.59 0.54 1.02 Peak Volume (ac‐ft) 10.7 35.4 21.6 7.5 4.8 7.5 2.4 17.5 Hydrograph of peak WY 2020 impoundment event, 11/29/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 813 Percent Spillway Capacity 0.2 0.7 0.4 0.2 0.2 0.2 0.2 0.3 Spookhill FRS at McKellips Road, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 35 2 18 3 1 4 --5 6 7 --8 --9 9 --10 20 11 1 12 13 14 15 16 17 18 5 19 5 20 1 21 4 22 1 23 1 24 25 3 26 1 27 3 28 29 29 1 30 38 --31 --1 -------------------------------------------------------------------------------------TOTAL 0 73 90 0 1 11 0 0 0 0 1 0 MEAN 0 2 3 0 0 0 0 0 0 0 0 0 MAX 0 40 37 0 7 23 0 0 0 0 10 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 145 178 0 2 21 0 0 0 1 1 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 175 MEAN 0 MAX 40 MIN 0 AC_FT 348 FCDMC Annual Surface Water Report, Water Year 2020 Page 814 Spookhill FRS at McKellips Road, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 23 2 14 3 4 --5 6 7 --8 --9 7 --10 14 11 12 13 14 15 16 17 18 4 19 5 20 21 5 22 23 24 25 2 26 27 28 29 24 30 28 --31 ---------------------------------------------------------------------------------------MEAN 0 2 2 0 0 0 0 0 0 0 0 0 MAX 0 35 25 0 8 18 0 0 0 0 11 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 35 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 815 Spookhill FRS at McKellips Road, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.2 0.2 1.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 2 0.2 0.2 0.9 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 3 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.3 0.2 0.2 4 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 --0.2 0.2 5 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 6 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 7 0.2 0.2 0.2 0.2 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 8 0.2 0.2 0.2 0.2 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 9 0.2 0.2 0.5 0.2 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 10 0.2 0.3 0.9 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 11 0.2 0.2 0.2 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 12 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 13 0.2 0.2 0.2 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 14 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 15 0.2 0.2 0.2 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 16 0.2 0.2 0.2 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 17 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 18 0.2 0.2 0.2 0.2 0.3 0.4 0.2 0.2 0.2 0.2 0.2 0.2 19 0.2 0.2 0.2 0.2 0.2 0.5 0.2 0.2 0.2 0.2 0.2 0.2 20 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 21 0.2 0.4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 22 0.2 0.3 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 23 0.2 0.2 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 24 0.2 0.2 0.2 0.2 0.2 0.0 0.2 0.2 0.2 0.0 0.2 0.2 25 0.2 0.2 0.4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 26 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 27 0.2 0.2 0.4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 28 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 29 0.2 1.3 0.2 0.2 0.2 0.0 0.2 0.2 0.2 0.2 0.3 0.2 30 0.2 1.5 0.3 0.2 --0.2 0.2 0.2 0.2 0.2 0.3 0.2 31 0.2 --0.3 0.2 --0.2 --0.2 --0.2 0.2 -------------------------------------------------------------------------------MEAN 0.2 0.3 0.4 0.2 0.3 0.3 0.2 0.2 0.2 0.3 0.3 0.2 MAX 0.2 1.8 1.4 0.2 0.6 1.0 0.2 0.2 0.2 0.3 0.7 0.2 MIN 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.27 MAX 1.79 MIN 0.25 FCDMC Annual Surface Water Report, Water Year 2020 Page 816 Spookhill FRS at Brown Road, ID #81507 Site Data LOCATION Located at Brown Road and SR 202L DRAINAGE AREA 13.6 mi2 at outlet gage STREAM TYPE Engineered Channel / Levee / Dam JURISDICTION Mesa, Arizona WATERSHED Lower Verde SECTION/TOWNSHIP/RANGE S16 T1N R7E LATITUDE N 33° 26' 11.9" | +33.43664 LONGITUDE W 111° 38' 52.8" | ‐111.64799 STREAMGAGE INSTALLATION DATE 06/04/2008 ‐ WY 2008 AVAILABLE PERIOD OF RECORD (POR) 06/04/2008 ‐ Current LENGTH OF AVAILABLE POR DATA 12.33 Years | 4,502 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.32 feet Gage Height STAFF GAGES None ZERO GAGE HEIGHT ELEVATION 1,571.53 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height DAM ELEVATIONS AS RELATED TO GAGE HEIGHT AT THIS SITE PRINCIPAL OUTLET ELEVATION ‐3.43 feet Gage Height UNGATED PRINCIPAL OUTLET INLET ELEV 5.97 feet Gage Height MINIMUM FREEWAY LEVEE ELEVATION 10.57 feet Gage Height SPILLWAY ELEVATION 12.68 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 817 Watershed Map Spookhill FRS at Brown Road - water year peaks Volume (acre-feet) 400 350 300 250 200 150 100 50 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 818 2020 2025 WY2020 Events Date of Peak 11/29/2019 12/25/2019 03/13/2020 03/18/2020 Peak Gage Height (feet) 2.11 0.94 0.74 0.96 Peak Volume (ac‐ft) 105.1 54.5 48.0 55.1 Hydrograph of peak WY 2020 impoundment event, 11/29/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 819 Percent Spillway Capacity 3.1 1.4 1.1 1.5 Spookhill FRS at Brown Road, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 19 2 3 4 5 6 1 7 --8 --9 --10 11 12 13 14 14 15 16 17 18 28 19 43 20 41 21 22 22 23 24 25 26 26 27 28 29 35 30 42 --31 ---------------------------------------------------------------------------------------TOTAL 0 77 45 0 0 148 0 0 0 0 1 0 MEAN 0 3 1 0 0 5 0 0 0 0 0 0 MAX 0 47 44 0 0 44 0 0 0 0 3 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 153 89 0 0 293 0 0 0 0 1 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 271 MEAN 1 MAX 47 MIN 0 AC_FT 537 FCDMC Annual Surface Water Report, Water Year 2020 Page 820 Spookhill FRS at Brown Road, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 19 2 3 4 5 6 7 --8 --9 --10 11 12 13 15 14 15 16 17 18 31 19 46 20 38 21 20 22 23 24 25 29 26 27 28 29 52 30 42 --31 ---------------------------------------------------------------------------------------MEAN 0 3 2 0 0 5 0 0 0 0 0 0 MAX 0 105 55 0 0 55 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 1 MAX 105 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 821 Spookhill FRS at Brown Road, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.3 0.3 0.4 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 2 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 4 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 5 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 7 0.3 0.3 0.3 0.3 --0.3 0.3 0.3 0.3 0.3 0.3 0.3 8 0.3 0.3 0.3 0.3 --0.3 0.3 0.3 0.3 0.3 0.3 0.3 9 0.3 0.3 0.3 0.3 --0.3 0.3 0.3 0.3 0.3 0.3 0.3 10 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 11 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 12 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 13 0.3 0.3 0.3 0.3 0.3 0.4 0.3 0.3 0.3 0.3 0.3 0.3 14 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 15 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 16 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 17 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 18 0.3 0.3 0.3 0.3 0.3 0.6 0.3 0.3 0.3 0.3 0.3 0.3 19 0.3 0.3 0.3 0.3 0.3 0.7 0.3 0.3 0.3 0.3 0.3 0.3 20 0.3 0.3 0.3 0.3 0.3 0.5 0.3 0.3 0.3 0.3 0.3 0.3 21 0.3 0.3 0.3 0.3 0.3 0.4 0.3 0.3 0.3 0.3 0.3 0.3 22 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 23 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 24 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 25 0.3 0.3 0.6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 26 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 27 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 28 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 29 0.3 1.0 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 30 0.3 0.6 0.3 0.3 --0.3 0.3 0.3 0.3 0.3 0.3 0.3 31 0.3 --0.3 0.3 --0.3 --0.3 --0.3 0.3 -------------------------------------------------------------------------------MEAN 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 MAX 0.3 2.1 0.9 0.3 0.3 1.0 0.3 0.3 0.3 0.3 0.3 0.3 MIN 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.28 MAX 2.11 MIN 0.27 FCDMC Annual Surface Water Report, Water Year 2020 Page 822 Stagecoach Wash, ID #20007 Site Data LOCATION On Pima Road about 1/4 miles south of Stagecoach Pass DRAINAGE AREA 1.12 mi2 STREAM TYPE Culvert at natural stream JURISDICTION Scottsdale, Arizona WATERSHED Cave Creek SECTION/TOWNSHIP/RANGE S061 T5N R5E LATITUDE N 33° 48' 42.8" | +33.81190 LONGITUDE W 111° 53' 28.0" | ‐111.89112 STREAMGAGE INSTALLATION DATE 06/13/2001 ‐ WY 2001 AVAILABLE PERIOD OF RECORD (POR) 06/13/2001 ‐ Current LENGTH OF AVAILABE POR DATA 19.30 Years | 7,050 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.85 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 2,548.94 feet NAVD88 POINT OF ZERO FLOW 0.7 feet Gage Height EXTREME FOR PERIOD OF RECORD 802 cfs | 5.10 feet | 07/31/2007 FCDMC Annual Surface Water Report, Water Year 2020 Page 823 Watershed Map Stagecoach Wash - water year peaks 900 Discharge (cfs) 800 700 600 500 400 300 200 100 0 2000 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 824 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No runoff recorded in Water Year 2020. Flood Flow Frequency Flood Flow Frequency N=20, HEC‐WRC computation (based on 20 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 14 59 145 328 898 1,850 FCDMC Annual Surface Water Report, Water Year 2020 Page 825 Stagecoach Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 8 8 8 8 8 8 8 8 8 8 8 8 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 17 16 17 17 15 17 16 17 16 17 17 16 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 99 MEAN 0 MAX 0 MIN 0 AC_FT 195 FCDMC Annual Surface Water Report, Water Year 2020 Page 826 Stoneridge Dam, ID #77307 Site Data LOCATION About 1/2 mile north of Shea Boulevard, west of Fountain Hills Boulevard DRAINAGE AREA 0.86 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Fountain Hills, Arizona WATERSHED Lower Verde SECTION/TOWNSHIP/RANGE S22 T3N R6E LATITUDE N 33° 35' 40.1" | +33.59448 LONGITUDE W 111° 44' 00.0" | ‐111.73332 STREAMGAGE INSTALLATION DATE 12/11/1996 ‐ WY 1997 AVAILABLE PERIOD OF RECORD (POR) 12/11/1996 ‐ Current LENGTH OF AVAILABLE POR DATA 23.81 Years | 8,695 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 1.30 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,680.94 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY CREST ELEVATION 24.0 feet Gage Height TOP OF DAM ELEVATION 31.0 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 827 Watershed Map Volume (acre-feet) Stoneridge Dam - water year peaks 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 828 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Volume (ac‐ft) Percent Spillway Capacity 02/10/2020 4.02 0.5 0.9 Hydrograph of peak WY 2020 impoundment event, 02/10/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 829 Stoneridge Dam, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 4 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 2 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 36 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 4 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 2 MEAN 0 MAX 36 MIN 0 AC_FT 4 FCDMC Annual Surface Water Report, Water Year 2020 Page 830 Stoneridge Dam, volume data Volume, in acre feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 1 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 1 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 831 Stoneridge Dam, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 2 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 4 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 5 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 6 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 7 1.3 1.3 1.3 1.3 --1.3 1.3 1.3 1.3 1.3 1.3 1.3 8 1.3 1.3 1.3 1.3 --1.3 1.3 1.3 1.3 1.3 1.3 1.3 9 1.3 1.3 1.3 1.3 --1.3 1.3 1.3 1.3 1.3 1.3 1.3 10 1.3 1.3 1.3 1.3 1.4 1.3 1.3 1.3 1.3 1.3 1.3 1.3 11 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 12 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 13 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 14 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 15 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 16 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 17 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 18 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 19 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 20 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 21 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 22 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 23 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 24 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 25 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 26 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 27 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 28 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 29 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 30 1.3 1.3 1.3 1.3 --1.3 1.3 1.3 1.3 1.3 1.3 1.3 31 1.3 --1.3 1.3 --1.3 --1.3 --1.3 1.3 -------------------------------------------------------------------------------MEAN 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 MAX 1.3 1.3 1.3 1.3 4.0 1.3 1.3 1.3 1.3 1.3 1.3 1.3 MIN 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 -----------------------------------------------------------------------------WTR YR 2020 MEAN 1.30 MAX 4.02 MIN 1.30 FCDMC Annual Surface Water Report, Water Year 2020 Page 832 Sun Valley Parkway at Northern Avenue, ID #48307 Site Data LOCATION On Sun Valley Parkway near the Northern Avenue alignment DRAINAGE AREA 1.4 mi2 STREAM TYPE Natural Stream JURISDICTION Maricopa County, Arizona WATERSHED Lower Hassayampa SECTION/TOWNSHIP/RANGE S32 T3N R4W LATITUDE N 33° 33' 12.4" | +33.55345 LONGITUDE W 112° 40' 40.9" | ‐112.67803 STREAMGAGE INSTALLATION DATE 08/02/2005 ‐ WY 2005 AVAILABLE PERIOD OF RECORD (POR) 08/02/2005 ‐ Current LENGTH OF AVAILABLE POR DATA 15.16 Years | 5,539 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.15 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,394.57 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 790 cfs | 1.88 feet | 09/08/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 833 Watershed Map Sun Valley Parkway at Northern Avenue - water year peaks 900 Discharge (cfs) 800 700 600 500 400 300 200 100 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 834 2020 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No runoff recorded in Water Year 2020. Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 835 Sun Valley Parkway at Northern, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 836 Sunnycove FRS, ID #46507 Site Data LOCATION In Wickenburg south of US 60 near the cemetery DRAINAGE AREA 1.35 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Wickenburg, Arizona WATERSHED Lower Hassayampa SECTION/TOWNSHIP/RANGE S11 T7N R5W LATITUDE N 33° 57' 26.1" | +33.95725 LONGITUDE W 112° 44' 23.2" | ‐112.73978 STREAMGAGE INSTALLATION DATE 07/01/1986 ‐ WY 1986 AVAILABLE PERIOD OF RECORD (POR) 12/16/1988 ‐ Current LENGTH OF AVAILABLE POR DATA 31.79 Years | 11,612 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.00 feet Gage Height STAFF GAGES 10 ZERO GAGE HEIGHT ELEVATION 2,135.10 feet NAVD88 POINT OF ZERO FLOW (GATED ORIFICE) ‐5.0 feet Gage Height POINT OF ZERO FLOW (UNGATED ORIFICE) 15.0 feet Gage Height POINT OF ZERO FLOW (PRINCIPAL OUTLET TOWER) 36.5 feet Gage Height SPILLWAY ELEVATION 37.1 feet Gage Height TOP OF DAM ELEVATION 45.0 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 837 Watershed Map Sunnycove FRS - water year peaks Volume (acre-feet) 160 140 120 100 80 60 40 20 0 1985 1990 1995 2000 2005 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 838 2010 2015 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/29/2019 03/14/2020 Peak Gage Height (feet) 2.01 11.19 3.57 Peak Volume (ac‐ft) 0.2 9.1 0.7 Hydrograph of peak WY 2020 impoundment event, 11/29/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 839 Percent Spillway Capacity 0.1 4.4 0.3 Sunnycove FRS, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 --14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 840 Sunnycove FRS, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 8 1 2 8 1 3 6 1 4 3 1 5 2 1 6 2 1 7 2 1 8 2 1 9 2 1 10 2 1 11 2 1 12 2 1 13 --2 1 1 14 2 1 1 15 2 1 1 16 2 1 1 17 2 1 18 2 1 19 2 1 20 1 1 21 1 1 22 1 1 23 1 1 24 1 1 25 1 1 26 1 1 27 1 28 1 29 8 1 30 8 1 --31 --1 -------------------------------------------------------------------------------------MEAN 0 1 2 1 0 0 0 0 0 0 0 0 MAX 0 9 8 1 0 1 0 0 0 0 0 0 MIN 0 0 1 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 9 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 841 Sunnycove FRS, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.0 0.0 10.5 4.6 2.8 1.8 0.0 0.0 0.0 0.0 0.0 0.0 2 0.0 0.0 10.3 4.5 2.8 1.8 0.0 0.0 0.0 0.0 0.0 0.0 3 0.0 0.0 9.5 4.4 2.8 1.1 0.0 0.0 0.0 0.0 0.0 0.0 4 0.0 0.0 6.4 4.4 2.7 0.3 0.0 0.0 0.0 0.0 0.0 0.0 5 0.0 0.0 5.9 4.3 2.7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 6 0.0 0.0 5.9 4.2 2.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 7 0.0 0.0 5.8 4.2 2.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 8 0.0 0.0 5.8 4.2 2.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 9 0.0 0.0 5.8 4.1 2.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 10 0.0 0.0 5.7 4.1 2.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 11 0.0 0.0 5.7 4.1 2.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 12 0.0 0.0 5.6 4.0 2.6 1.4 0.0 0.0 0.0 0.0 0.0 0.0 13 --0.0 5.5 3.9 2.5 3.6 0.0 0.0 0.0 0.0 0.0 0.0 14 0.0 0.0 5.5 3.9 2.5 3.5 0.0 0.0 0.0 0.0 0.0 0.0 15 0.0 0.0 5.4 3.8 2.4 3.4 0.0 0.0 0.0 0.0 0.0 0.0 16 0.0 0.0 5.4 3.8 2.4 3.3 0.0 0.0 0.0 0.0 0.0 0.0 17 0.0 0.0 5.3 3.7 2.3 2.9 0.0 0.0 0.0 0.0 0.0 0.0 18 0.0 0.0 5.3 3.7 2.2 2.7 0.0 0.0 0.0 0.0 0.0 0.0 19 0.0 0.0 5.2 3.6 2.2 2.4 0.0 0.0 0.0 0.0 0.0 0.0 20 0.0 1.6 5.1 3.6 2.1 0.3 0.0 0.0 0.0 0.0 0.0 0.0 21 0.0 1.9 5.1 3.5 2.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 22 0.0 0.6 5.0 3.5 2.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 23 0.0 0.0 4.9 3.4 2.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 24 0.0 0.0 4.9 3.3 2.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 25 0.0 0.0 4.9 3.2 2.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 26 0.0 0.0 4.9 3.2 2.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 27 0.0 0.0 4.8 3.1 1.9 0.0 0.0 0.0 0.0 0.0 0.0 0.0 28 0.0 0.2 4.8 3.1 1.9 0.0 0.0 0.0 0.0 0.0 0.0 0.0 29 0.0 9.9 4.7 3.1 1.8 0.0 0.0 0.0 0.0 0.0 0.0 0.0 30 0.0 10.7 4.7 3.0 --0.0 0.0 0.0 0.0 0.0 0.0 0.0 31 0.0 --4.6 2.9 --0.0 --0.0 --0.0 0.0 -------------------------------------------------------------------------------MEAN 0.0 0.8 5.8 3.8 2.4 0.9 0.0 0.0 0.0 0.0 0.0 0.0 MAX 0.0 11.2 10.7 4.6 3.0 3.7 0.0 0.0 0.0 0.0 0.0 0.0 MIN 0.0 0.0 4.5 2.8 1.7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 1.14 MAX 11.19 MIN 0.00 FCDMC Annual Surface Water Report, Water Year 2020 Page 842 Sunridge Canyon Dam, ID #77507 Site Data LOCATION Near the Sunridge Canyon Golf Course DRAINAGE AREA 1.60 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Fountain Hills, Arizona WATERSHED Lower Verde SECTION/TOWNSHIP/RANGE S16 T3N R6E LATITUDE N 33° 36' 23.1" | +33.60641 LONGITUDE W 111° 45' 04.0" | ‐111.75112 STREAMGAGE INSTALLATION DATE 02/04/1997 ‐ WY 1997 AVAILABLE PERIOD OF RECORD (POR) 02/04/1997 ‐ Current LENGTH OF AVAILABLE POR DATA 23.66 Years | 8,640 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 1.20 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,886.90 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY CREST ELEVATION 40.1 feet Gage Height TOP OF DAM ELEVATION 47.0 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 843 Watershed Map Sunridge Canyon Dam - water year peaks Volume (acre-feet) 3.0 2.5 2.0 1.5 1.0 0.5 0.0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 844 2015 2020 2025 WY2020 Events Date of Peak 11/29/2019 11/30/2019 Peak Gage Height (feet) 1.53 1.88 Peak Volume (ac‐ft) 0.0 0.0 Hydrograph of peak WY 2020 impoundment event, 11/30/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 845 Percent Spillway Capacity 0.0 0.0 Sunridge Canyon Dam, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 --3 --4 5 6 7 8 --9 10 11 --12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 2 30 5 --31 ---------------------------------------------------------------------------------------TOTAL 0 7 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 27 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 14 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 7 MEAN 0 MAX 27 MIN 0 AC_FT 14 FCDMC Annual Surface Water Report, Water Year 2020 Page 846 Sunridge Canyon Dam, volume data Volume, in acre feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 --3 --4 5 6 7 8 --9 10 11 --12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 0 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 847 Sunridge Canyon Dam, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 2 1.2 --1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 3 1.2 --1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 4 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 5 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 6 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 7 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 8 1.2 1.2 1.2 1.2 1.2 --1.2 1.2 1.2 1.2 1.2 1.2 9 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 10 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 11 1.2 1.2 1.2 1.2 1.2 --1.2 1.2 1.2 1.2 1.2 1.2 12 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 13 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 14 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 15 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 16 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 17 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 18 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 19 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 20 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 21 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 22 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 23 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 24 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 25 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 26 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 27 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 28 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 29 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 30 1.2 1.3 1.2 1.2 --1.2 1.2 1.2 1.2 1.2 1.2 1.2 31 1.2 --1.2 1.2 --1.2 --1.2 --1.2 1.2 -------------------------------------------------------------------------------MEAN 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 MAX 1.2 1.9 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 MIN 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 -----------------------------------------------------------------------------WTR YR 2020 MEAN 1.20 MAX 1.88 MIN 1.20 FCDMC Annual Surface Water Report, Water Year 2020 Page 848 Sunset FRS, ID #46007 Site Data LOCATION In Wickenburg near US 60 and Mariposa Drive DRAINAGE AREA 0.95 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Wickenburg, Arizona WATERSHED Lower Hassayampa SECTION/TOWNSHIP/RANGE S11 T7N R5W LATITUDE N 33° 57' 53.7" | +33.96491 LONGITUDE W 112° 44' 32.6" | ‐112.74238 STREAMGAGE INSTALLATION DATE 02/12/1989 ‐ WY 1989 AVAILABLE PERIOD OF RECORD (POR) 02/12/1989 ‐ Current LENGTH OF AVAILABLE POR DATA 31.63 Years | 11,554 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.10 feet Gage Height STAFF GAGES 7 ZERO GAGE HEIGHT ELEVATION 2,114.01 feet NAVD88 POINT OF ZERO FLOW (GATED ORIFICE) 0.0 feet Gage Height POINT OF ZERO FLOW (UNGATED ORIFICE) 8.75 feet Gage Height POINT OF ZERO FLOW (PRINCIPAL OUTLET TOWER) 19.75 feet Gage Height SPILLWAY ELEVATION 18.85 feet Gage Height TOP OF DAM ELEVATION 30.0 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 849 Watershed Map Sunset FRS - water year peaks Volume (acre-feet) 70 60 50 40 30 20 10 0 1985 1990 1995 2000 2005 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 850 2010 2015 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/29/2019 12/24/2019 02/11/2020 02/22/2020 03/13/2020 03/18/2020 08/30/2020 Peak Gage Height (feet) 4.06 7.29 1.23 4.06 3.57 5.09 4.06 3.68 Peak Volume (ac‐ft) 1.1 8.0 0.0 1.1 0.8 2.7 1.1 0.8 Hydrograph of peak WY 2020 impoundment event, 11/29/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 851 Percent Spillway Capacity 1.4 10.3 0.0 1.4 0.9 3.6 1.4 1.0 Sunset FRS, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 --14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 852 Sunset FRS, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 4 2 4 3 3 4 2 5 2 6 1 7 1 8 1 9 10 11 1 12 1 13 --2 14 1 15 1 16 1 17 18 19 1 20 1 21 1 22 23 24 25 26 27 28 29 6 30 6 --31 ---------------------------------------------------------------------------------------MEAN 0 0 1 0 0 0 0 0 0 0 0 0 MAX 0 8 5 0 1 3 0 0 0 0 1 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 8 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 853 Sunset FRS, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 1.5 0.1 6.0 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 2.3 2 1.2 0.1 5.6 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 1.9 3 0.5 0.1 5.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 1.5 4 0.1 0.1 4.9 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 1.1 5 0.1 0.1 4.5 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.6 6 0.1 0.1 4.0 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.2 7 0.1 0.1 3.7 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 8 0.1 0.1 3.3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 9 0.1 0.1 2.3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 10 0.1 0.1 0.7 0.1 0.1 0.3 0.1 0.1 0.1 0.1 0.1 0.1 11 0.1 0.1 0.1 0.1 3.1 2.0 0.1 0.1 0.1 0.1 0.1 0.1 12 0.1 0.1 0.1 0.1 3.1 3.8 0.1 0.1 0.1 0.1 0.1 0.1 13 --0.1 0.1 0.1 2.6 4.8 0.1 0.1 0.1 0.1 0.1 0.1 14 0.1 0.1 0.1 0.1 2.1 4.3 0.1 0.1 0.1 0.1 0.1 0.1 15 0.1 0.1 0.1 0.1 1.7 3.9 0.1 0.1 0.1 0.1 0.1 0.1 16 0.1 0.1 0.1 0.1 1.1 3.6 0.1 0.1 0.1 0.1 0.1 0.1 17 0.1 0.1 0.1 0.1 0.2 2.9 0.1 0.1 0.1 0.1 0.1 0.1 18 0.1 0.1 0.1 0.1 0.1 2.9 0.1 0.1 0.1 0.1 0.1 0.1 19 0.1 0.1 0.1 0.1 0.1 3.8 0.1 0.1 0.1 0.1 0.1 0.1 20 0.1 3.5 0.1 0.1 0.1 2.4 0.1 0.1 0.1 0.1 0.1 0.1 21 0.1 3.6 0.1 0.1 0.1 0.6 0.1 0.1 0.1 0.1 0.1 0.1 22 0.1 1.9 0.1 0.1 1.7 0.1 0.1 0.1 0.1 0.1 0.1 0.1 23 0.1 0.2 0.1 0.1 3.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 24 0.1 0.1 0.5 0.1 2.5 0.1 0.1 0.1 0.1 0.1 0.1 0.1 25 0.1 0.1 0.2 0.1 2.0 0.1 0.1 0.1 0.1 0.1 0.1 0.1 26 0.1 0.1 0.1 0.1 1.5 0.1 0.1 0.1 0.1 0.1 0.1 0.1 27 0.1 0.1 0.1 0.1 0.7 0.1 0.1 0.1 0.1 0.1 0.1 0.1 28 0.1 0.5 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 29 0.1 6.6 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 30 0.1 6.5 0.1 0.1 --0.1 0.1 0.1 0.1 0.1 1.1 0.1 31 0.1 --0.1 0.1 --0.1 --0.1 --0.1 2.9 -------------------------------------------------------------------------------MEAN 0.2 0.8 1.4 0.1 0.9 1.2 0.1 0.1 0.1 0.1 0.2 0.3 MAX 1.8 7.3 6.2 0.1 4.1 5.1 0.1 0.1 0.1 0.1 3.7 2.5 MIN 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.47 MAX 7.29 MIN 0.10 FCDMC Annual Surface Water Report, Water Year 2020 Page 854 Sycamore Creek Fire, ID #81807(transducer)/81813(radar) Site Data LOCATION Located near town of Sunflower, Arizona DRAINAGE AREA 20.2 mi2 STREAM TYPE Natural Stream JURISDICTION Maricopa County, Arizona WATERSHED Lower Verde SECTION/TOWNSHIP/RANGE S25 T7N R8E LATITUDE N 33° 55' 34.8" | +33.92634 LONGITUDE W 111° 28' 46.0" | ‐111.47944 STREAMGAGE INSTALLATION DATE 06/26/2012 ‐ WY 2012 AVAILABLE PERIOD OF RECORD (POR) 06/26/2012 ‐ Current LENGTH OF AVAILABLE POR DATA 8.27 Years | 3,019 Days DATA GAPS IN POR None STATUS SENSOR (5872) ELEVATION 2.15 feet Gage Height RADAR GAGE (5871) GROUND ELEVATION BELOW SENSOR 3.8 feet Gage Height TRANSDUCER GAGE (5873) ELEVATION 7.26 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 3,783.64 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 7,906 cfs | 11.96 feet gage height | 08/16/2012 FCDMC Annual Surface Water Report, Water Year 2020 Page 855 Location Map Sycamore Creek Fire - water year peaks 9,000 Discharge (cfs) 8,000 7,000 6,000 5,000 4,000 3,000 2,000 1,000 0 2010 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 856 2025 WY2020 Events Date of Peak Peak Gage Height Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No runoff recorded in Water Year 2020. Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 857 Sycamore Creek Fire, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 --20 ----21 ----22 ------23 ----24 --25 --26 --27 --28 --29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 858 Tat Momolikot Dam, ID #773 Site Data LOCATION On the Tohono O'Odham Reservation west of Eloy DRAINAGE AREA 1,780 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Tohono O'Odham Reservation, Arizona WATERSHED Santa Rosa SECTION/TOWNSHIP/RANGE S14 T9S R4E LATITUDE N 32° 39' 00.6" | +32.65016 LONGITUDE W 111° 55' 42.0" | ‐111.92833 STREAMGAGE INSTALLATION DATE 01/21/1998 ‐ WY 1998 AVAILABLE PERIOD OF RECORD (POR) 01/19/2000 – 05/09/2020 LENGTH OF AVAILABLE POR DATA 18.70 Years | 6,830 Days DATA GAPS IN POR 01/21/1998 ‐ 01/19/2000 STAGE GAGE ELEVATION 0.81 Feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,485.00 feet M.S.L. PZF (LOW GATED ORIFICE) 0.0 Feet Gage Height PZF (MIDDLE GATED ORIFICE) 8.0 Feet Gage Height PZF (UPPER GATED ORIFICE) 16.0 Feet Gage Height SPILLWAY ELEVATION 54.0 feet Gage Height TOP OF DAM ELEVATION 72.5 feet Gage Height Note: Damage to stilling well occurred in late 2018 / early 2019 which made data collection impossible after that time. Peaks in October 2018 are considered valid and good. FCDMC Annual Surface Water Report, Water Year 2020 Page 859 Watershed Map Tat Momolikot Dam - water year peaks Volume (acre-feet) 16,000 14,000 12,000 10,000 8,000 6,000 4,000 2,000 0 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 860 2015 2020 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Volume (ac‐ft) Percent Spillway Capacity 02/10/2020 4.68 932 0.5 Hydrograph of peak WY 2020 impoundment event, Hydrograph unavailable. FCDMC Annual Surface Water Report, Water Year 2020 Page 861 Tat Momolikot Dam, runoff data Discharge, in cub, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 --------2 --------3 --------4 --------5 --------6 --------7 --------8 --------9 --------10 --------11 --------12 --------13 --------14 --------15 --------16 --------17 --------18 --------19 --------20 --------21 ----------22 ----------23 ----------24 ----------25 ----------26 ------------27 ----------28 ----------29 ----------30 ------------31 ---------------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 --------MEAN 0 0 0 0 0 0 0 0 --------MAX 0 0 0 0 0 0 0 0 --------MIN 0 0 0 0 0 0 0 0 --------AC_FT 0 0 0 0 0 0 0 0 -------------------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 *Gage ID was 0768 prior to January 24, 2000. **FCD Operated gage since January 1998. However, this float gage did not operate properly. A pressure transducer gage was installed January 24, 2000 and all previous data were deleted. Previously, the US Army Corps of Engineers, Los Angeles District maintained a gage at this location. Station permanently removed from service on May 9, 2020. FCDMC Annual Surface Water Report, Water Year 2020 Page 862 Tat Momolikot Dam, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 853 752 529 --------2 847 744 510 --------3 842 490 --------4 842 736 121 --------5 836 734 --------6 823 722 --------7 831 719 --------8 820 729 --------9 820 719 --------10 505 811 710 --------11 918 811 712 --------12 918 809 699 --------13 916 809 697 --------14 907 809 697 --------15 907 803 694 --------16 896 806 691 --------17 896 796 684 --------18 896 796 678 --------19 885 804 664 --------20 883 806 668 --------21 875 803 668 ----------22 884 798 629 ----------23 885 796 629 ----------24 885 787 621 ----------25 875 787 598 ----------26 --787 587 ----------27 864 773 574 ----------28 858 763 563 ----------29 853 763 552 ----------30 --763 545 ----------31 ----752 -----------------------------------------------------------------------------------------MEAN 0 0 0 0 599 805 672 53 --------MAX 0 0 0 0 932 864 763 530 --------MIN 0 0 0 0 0 752 530 0 -------------------------------------------------------------------------------------WTR YR 2020 MEAN 175 MAX 932 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 863 Tat Momolikot Dam, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.8 0.8 0.8 0.8 0.8 4.3 3.9 2.8 --------2 0.8 0.8 0.8 0.8 0.8 4.3 3.8 2.8 --------3 0.8 0.8 0.8 0.8 0.8 4.3 0.0 2.7 --------4 0.8 0.8 0.8 0.8 0.8 4.3 3.8 2.6 --------5 0.8 0.8 0.8 0.8 0.8 4.2 3.8 2.6 --------6 0.8 0.8 0.8 0.8 0.8 4.2 3.7 2.6 --------7 0.8 0.8 0.8 0.8 0.8 4.2 3.7 2.6 --------8 0.8 0.8 0.8 0.8 0.8 4.2 3.8 2.6 --------9 0.8 0.8 0.8 0.8 0.8 4.2 3.7 2.6 --------10 0.8 0.8 0.8 0.8 3.7 4.1 3.7 2.6 --------11 0.8 0.8 0.8 0.8 4.6 4.1 3.7 2.6 --------12 0.8 0.8 0.8 0.8 4.6 4.1 3.6 2.6 --------13 0.8 0.8 0.8 0.8 4.6 4.1 3.6 2.6 --------14 0.8 0.8 0.8 0.8 4.6 4.1 3.6 2.6 --------15 0.8 0.8 0.8 0.8 4.6 4.1 3.6 2.6 --------16 0.8 0.8 0.8 0.8 4.5 4.1 3.6 2.6 --------17 0.8 0.8 0.8 0.8 4.5 4.1 3.6 2.6 --------18 0.8 0.8 0.8 0.8 4.5 4.1 3.5 2.6 --------19 0.8 0.8 0.8 0.8 4.5 4.1 3.5 2.6 --------20 0.8 0.8 0.8 0.8 4.5 4.1 3.5 2.6 --------21 0.8 0.8 0.8 0.8 4.4 4.1 3.5 ----------22 0.8 0.8 0.8 0.8 4.5 4.1 3.3 ----------23 0.8 0.8 0.8 0.8 4.5 4.1 3.3 ----------24 0.8 0.8 0.8 0.8 4.5 4.0 3.3 ----------25 0.8 0.8 0.8 0.8 4.4 4.0 3.2 ----------26 0.8 0.8 0.8 0.8 --4.0 3.1 ----------27 0.8 0.8 0.8 0.8 4.4 4.0 3.0 ----------28 0.8 0.8 0.8 0.8 4.3 3.9 3.0 ----------29 0.8 0.8 0.8 0.8 4.3 3.9 3.0 ----------30 0.8 0.8 0.8 0.8 --3.9 2.9 ----------31 0.8 --0.8 0.8 --3.9 -----------------------------------------------------------------------------------------MEAN 0.8 0.8 0.8 0.8 3.3 4.1 3.5 2.6 --------MAX 0.8 0.8 0.8 0.8 4.7 4.4 3.9 2.9 --------MIN 0.8 0.8 0.8 0.8 0.8 3.9 2.9 2.6 -------------------------------------------------------------------------------------WTR YR 2020 MEAN 2.26 MAX 4.68 MIN 0.81 FCDMC Annual Surface Water Report, Water Year 2020 Page 864 Tatum Wash Basin Inflow – ID #58007 Site Data LOCATION Located near Shea Boulevard and 44th Street DRAINAGE AREA 2.17 mi2 STREAM TYPE Engineered Natural Stream JURISDICTION Phoenix, Arizona WATERSHED Middle Indian Bend SECTION/TOWNSHIP/RANGE S30 T3N R4E LATITUDE N 33° 34' 54.1" | +33.58169 LONGITUDE W 111° 59' 04.3" | ‐111.98453 STREAMGAGE INSTALLATION DATE 06/03/1994 ‐ WY 1994 AVAILABLE PERIOD OF RECORD (POR) 06/03/1994 ‐ Current LENGTH OF AVAILABLE POR DATA DATA 26.33 Years | 9,617 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.10 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,400.73 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 1,688 cfs | 3.68 feet | 09/08/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 865 Watershed Map Tatum Wash - water year peaks 1,800 Discharge (cfs) 1,600 1,400 1,200 1,000 800 600 400 200 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 866 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No runoff recorded in Water Year 2020. Flood Flow Frequency Flood Flow Frequency N=27, HEC‐WRC computation (based on 27 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 67 466 1,090 2,050 3,830 5,560 FCDMC Annual Surface Water Report, Water Year 2020 Page 867 Tatum Basin Inflow, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 11 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 11 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 868 Tatum Wash Basin – ID #58507 Site Data LOCATION Located near Shea Boulevard and 44th Street DRAINAGE AREA 2.17 mi2 STREAM TYPE Flood control basin on natural stream JURISDICTION Phoenix, Arizona WATERSHED Middle Indian Bend SECTION/TOWNSHIP/RANGE S30 T3N R4E LATITUDE N 33° 34' 56.8" | +33.58245 LONGITUDE W 111° 59' 01.5" | ‐111.98376 STREAMGAGE INSTALLATION DATE 05/08/1998 ‐ WY 1998 AVAILABLE PERIOD OF RECORD (POR) 05/08/1998 ‐ Current LENGTH OF AVAILABLE POR DATA DATA 22.40 Years | 8,182 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.05 feet Gage Height ZERO GAGE HEIGHT ELEVATION 1,383.27 feet NAVD88 PZF (LOWER FLAP‐GATE) 0.5 feet Gage Height PZF (UPPER FLAP‐GATE) 4.5 feet Gage Height PZF (UNCONTROLLED INLET TOWER) 11.6 feet Gage Height SPILLWAY CREST ELEVATION 12.6 feet Gage Height TOP OF BASIN ELEVATION 13.6 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 869 Watershed Map Tatum Basin - water year peaks 45 Volume (acre-feet) 40 35 30 25 20 15 10 5 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 870 2015 2020 2025 WY2020 Events Date of Peak 11/29/2019 12/09/2019 12/24/2019 03/13/2020 03/18/2020 Peak Gage Height (feet) 0.82 1.12 2.06 2.24 1.86 Peak Volume (ac‐ft) 1.5 2.1 4.2 4.6 3.7 Hydrograph of peak WY 2020 impoundment event, 03/13/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 871 Percent Spillway Capacity 4.4 6.3 12.6 14.0 11.3 Tatum Wash Basin, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 1 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 1 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 872 Tatum Wash Basin, volume data Volume, in acre feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 --8 --9 --10 11 12 13 1 14 1 15 16 17 18 19 1 20 21 22 23 24 1 25 1 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 1 4 0 0 5 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 5 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 873 Tatum Wash Basin, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 4 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 5 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 6 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 7 0.1 0.1 0.1 0.1 --0.1 0.1 0.1 0.1 0.1 0.1 0.1 8 0.1 0.1 0.1 0.1 --0.1 0.1 0.1 0.1 0.1 0.1 0.1 9 0.1 0.1 0.3 0.1 --0.1 0.1 0.1 0.1 0.1 0.1 0.1 10 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 11 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 12 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 13 0.1 0.1 0.1 0.1 0.1 0.6 0.1 0.1 0.1 0.1 0.1 0.1 14 0.1 0.1 0.1 0.1 0.1 0.5 0.1 0.1 0.1 0.1 0.1 0.1 15 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 16 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 17 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 18 0.1 0.1 0.1 0.1 0.1 0.3 0.1 0.1 0.1 0.1 0.1 0.1 19 0.1 0.1 0.1 0.1 0.1 0.5 0.1 0.1 0.1 0.1 0.1 0.1 20 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 21 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 22 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 23 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 24 0.1 0.1 0.4 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 25 0.1 0.1 0.5 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 26 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 27 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 28 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 29 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 30 0.1 0.1 0.1 0.1 --0.1 0.1 0.1 0.1 0.1 0.1 0.1 31 0.1 --0.1 0.1 --0.1 --0.1 --0.1 0.1 -------------------------------------------------------------------------------MEAN 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 MAX 0.1 0.8 2.1 0.1 0.1 2.2 0.1 0.1 0.1 0.1 0.1 0.2 MIN 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.06 MAX 2.24 MIN 0.05 FCDMC Annual Surface Water Report, Water Year 2020 Page 874 Tenth Street Wash Basin #1, ID #11007 Site Data LOCATION Near Cave Creek Road and Peoria Avenue DRAINAGE AREA 1.2 mi2 STREAM TYPE Flood control basin on natural stream JURISDICTION Phoenix, Arizona WATERSHED Upper ACDC SECTION/TOWNSHIP/RANGE S28 T3N R3E LATITUDE N 33° 34' 46.8" | +33.57969 LONGITUDE W 112° 03' 17.3" | ‐112.05476 STREAMGAGE INSTALLATION DATE 11/26/1996 ‐ WY 1997 AVAILABLE PERIOD OF RECORD (POR) 11/26/1996 ‐ Current LENGTH OF AVAILABLE POR DATA 23.85 Years | 8,710 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.33 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,308.78 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY CREST ELEVATION 11.5 feet Gage Height TOP OF BASIN ELEVATION 13.2 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 875 Watershed Map Tenth Street Wash Basin #1 - water year peaks Volume (acre-feet) 6.0 5.0 4.0 3.0 2.0 1.0 0.0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 876 2015 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/20/2019 11/29/2019 12/24/2019 12/25/2019 02/11/2020 02/22/2020 03/11/2020 03/12/2020 03/12/2020 03/13/2020 03/13/2020 Peak Gage Height (feet) 0.95 0.97 1.30 0.95 0.70 1.07 1.47 1.10 1.30 1.52 1.72 2.39 Peak Volume (ac‐ft) 0.3 0.3 0.6 0.3 0.2 0.4 0.7 0.4 0.6 0.8 1.0 1.7 Hydrograph of peak WY 2020 impoundment event, 03/13/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 877 Percent Spillway Capacity 1.8 1.8 2.8 1.4 1.1 2.1 3.5 2.1 2.8 3.8 4.7 8.4 Tenth Street Wash Basin #1, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 2 12 5 13 10 14 4 15 16 17 18 19 20 1 21 22 3 23 24 25 26 27 28 29 2 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 2 0 0 3 21 0 0 0 0 0 0 MEAN 0 0 0 0 0 1 0 0 0 0 0 0 MAX 0 8 3 0 10 21 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 5 0 0 6 41 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 26 MEAN 0 MAX 21 MIN 0 AC_FT 52 FCDMC Annual Surface Water Report, Water Year 2020 Page 878 Tenth Street Wash Basin #1, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 1 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 1 0 0 1 2 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 2 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 879 Tenth Street Wash Basin #1, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 2 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 4 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 5 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 7 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 8 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 9 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 10 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 11 0.3 0.3 0.3 0.3 0.4 0.6 0.3 0.3 0.3 0.3 0.3 0.3 12 0.3 0.3 0.3 0.3 0.3 1.0 0.3 0.3 0.3 0.3 0.3 0.3 13 0.3 0.3 0.3 0.3 0.3 1.5 0.3 0.3 0.3 0.3 0.3 0.3 14 0.3 0.3 0.3 0.3 0.3 0.9 0.3 0.3 0.3 0.3 0.3 0.3 15 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 16 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 17 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 18 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 19 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 20 0.3 0.5 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 21 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 22 0.3 0.3 0.3 0.3 0.7 0.3 0.3 0.3 0.3 0.3 0.3 0.3 23 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 24 0.3 0.3 0.4 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 25 0.3 0.3 0.4 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 26 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 27 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 28 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 29 0.3 0.6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 30 0.3 0.3 0.3 0.3 --0.3 0.3 0.3 0.3 0.3 0.3 0.3 31 0.3 --0.3 0.3 --0.3 --0.3 --0.3 0.3 -------------------------------------------------------------------------------MEAN 0.3 0.3 0.3 0.3 0.3 0.4 0.3 0.3 0.3 0.3 0.3 0.3 MAX 0.3 1.3 0.9 0.3 1.5 2.4 0.3 0.3 0.3 0.3 0.3 0.3 MIN 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.34 MAX 2.39 MIN 0.33 FCDMC Annual Surface Water Report, Water Year 2020 Page 880 Tiger Wash, ID #27007 Site Data LOCATION Near Eagle Eye Road about 10 miles north of Salome Road DRAINAGE AREA 85 mi2 STREAM TYPE Natural Stream JURISDICTION Maricopa County, Arizona WATERSHED Lower Centennial SECTION/TOWNSHIP/RANGE S26 T5N R10W LATITUDE N 33° 44' 30.3" | +33.74175 LONGITUDE W 113° 16' 42.8" | ‐113.27855 STREAMGAGE INSTALLATION DATE 09/15/1999 ‐ WY 1999 AVAILABLE PERIOD OF RECORD (POR) 09/15/1999 ‐ Current LENGTH OF AVAILABLE POR DATA 21.05 Years | 7,687 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 4.73 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 6 (Continuous Slope Area type) ZERO GAGE HEIGHT ELEVATION 1,866.15 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 4,541 cfs | 9.28 feet | 07/14/2012 EXTREME OUTSIDE PERIOD OF RECORD 7,778 cfs | 10.07 feet | 09/26/1997 FCDMC Annual Surface Water Report, Water Year 2020 Page 881 Watershed Map Discharge (cfs) Tiger Wash - water year peaks 5,000 4,500 4,000 3,500 3,000 2,500 2,000 1,500 1,000 500 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 882 2015 2020 2025 WY2020 Events Date of Peak 11/29/2019 03/12/2020 03/18/2020 Peak Gage Height (feet) 7.22 6.04 5.12 Peak Discharge (cfs) 1,481 575 163 Hydrograph of peak WY 2020 flow event, 11/29/2019 Flood Flow Frequency Flood Flow Frequency N=48, HEC‐WRC computation (based on 48 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 1,160 2,800 4,060 5,290 6,840 7,930 NOTE: These results are based on limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 883 Tiger Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 63 13 125 --14 --15 16 17 18 6 19 75 20 21 22 23 24 25 26 27 28 29 204 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 204 0 0 0 269 0 0 0 0 0 0 MEAN 0 7 0 0 0 9 0 0 0 0 0 0 MAX 0 1481 0 0 0 575 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 404 0 0 0 533 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 473 MEAN 1 MAX 1481 MIN 0 AC_FT 937 FCDMC Annual Surface Water Report, Water Year 2020 Page 884 Twin Buttes Wash, ID #73207 Site Data LOCATION Located on Vistancia Blvd. about 2 miles northwest of the Loop 303 DRAINAGE AREA 7.1 mi2 STREAM TYPE Natural JURISDICTION Peoria, Arizona WATERSHED Lower Agua Fria SECTION/TOWNSHIP/RANGE S25 T5N R1W LATITUDE N 33° 44' 18.4" | +33.73843 LONGITUDE W 112° 19' 10.4" | ‐112.31956 STREAMGAGE INSTALLATION DATE 10/29/2015 ‐ WY 2016 AVAILABLE PERIOD OF RECORD (POR) 12/09/2015 ‐ Current LENGTH OF AVAILABLE POR DATA 4.81 Years | 1,758 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.75 feet Gage Height STAFF GAGES None CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,346.36 feet NAVD88 POINT OF ZERO FLOW 0.2 feet Gage Height EXTREME FOR PERIOD OF RECORD 714 cfs | 3.93 feet Gage Height | 08/12/2018 FCDMC Annual Surface Water Report, Water Year 2020 Page 885 Watershed Map Discharge (cfs) Twin Buttes Wash - water year peaks 1,000 900 800 700 600 500 400 300 200 100 0 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 886 2025 WY2020 Events Date of Peak 11/20/2019 11/20/2019 11/29/2019 12/24/2019 03/12/2020 03/18/2020 Peak Gage Height 1.03 1.04 0.96 0.85 1.29 1.24 Peak Discharge (cfs) 26 26 22 16 46 41 Hydrograph of peak WY 2020 flow event, 03/12/2020 Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 887 Twin Buttes Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 1 13 5 14 15 16 17 18 7 19 20 3 21 22 23 24 25 26 27 28 29 3 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 6 0 0 0 12 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 27 16 0 0 46 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 12 1 0 0 24 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 19 MEAN 0 MAX 46 MIN 0 AC_FT 37 FCDMC Annual Surface Water Report, Water Year 2020 Page 888 University Drive at 62nd Street Basin, ID #34607 Site Data LOCATION On University Drive east of Recker Road DRAINAGE AREA Undetermined STREAM TYPE Flood control basin JURISDICTION Mesa, Arizona WATERSHED Upper East Maricopa Floodway SECTION/TOWNSHIP/RANGE S13 T1N R6E LATITUDE N 33° 25' 23.6" | +33.42321 LONGITUDE W 111° 41' 47.3" | ‐111.69647 STREAMGAGE INSTALLATION DATE 12/22/2016 – WY2017 AVAILABLE PERIOD OF RECORD (POR) 12/22/2016 – Current LENGTH OF AVAILABLE POR DATA 3.78 Years | 1,379 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.25 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,392.00 feet NAVD88 POINT OF ZERO FLOW 0.2 feet Gage Height SPILLWAY CREST ELEVATION 12.0 feet Gage Height TOP OF BASIN ELEVATION 12.5 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 889 Watershed Map University Dr at 62nd St Basin - water year peaks Volume (acre-feet) 7 6 5 4 3 2 1 0 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 890 2025 WY2020 Events Date of Peak 11/20/2019 11/29/2019 12/09/2019 12/24/2019 12/25/2019 02/11/2020 02/23/2020 03/11/2020 03/13/2020 03/18/2020 08/29/2020 Peak Gage Height (feet) 2.24 1.62 0.69 1.29 2.91 0.69 1.86 1.42 0.69 1.39 1.42 Peak Volume (ac‐ft) 0.04 0.02 0.00 0.01 0.09 0.00 0.02 0.01 0.00 0.01 0.01 Hydrograph of peak WY 2020 impoundment event, 12/25/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 891 Percent Spillway Capacity 0.2 0.1 0.0 0.0 0.4 0.0 0.1 0.0 0.0 0.0 0.0 University Drive at 62nd Street Basin, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 21 1 22 23 1 24 25 1 26 27 1 28 29 1 30 1 --31 ---------------------------------------------------------------------------------------TOTAL 0 5 2 0 1 1 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 3 4 0 2 2 0 0 0 0 2 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 9 4 0 2 2 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 9 MEAN 0 MAX 4 MIN 0 AC_FT 17 FCDMC Annual Surface Water Report, Water Year 2020 Page 892 University Drive at 62nd Street Basin, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 0 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 893 University Drive at 62nd Street Basin, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 5 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 6 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 7 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 8 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 9 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 10 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 11 0.2 0.2 0.2 0.2 0.3 0.6 0.2 0.2 0.2 0.2 0.2 0.2 12 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 13 0.2 0.2 0.2 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 14 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 15 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 16 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 17 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 18 0.2 0.2 0.2 0.2 0.2 0.5 0.2 0.2 0.2 0.2 0.2 0.2 19 0.2 0.3 0.2 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 20 0.2 1.1 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 21 0.2 1.0 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 22 0.2 0.4 0.2 0.2 0.6 0.2 0.2 0.2 0.2 0.2 0.2 0.2 23 0.2 0.2 0.2 0.2 0.7 0.2 0.2 0.2 0.2 0.2 0.2 0.2 24 0.2 0.2 0.4 0.2 0.2 0.2 0.2 0.2 0.2 0.3 0.2 0.2 25 0.2 0.2 0.9 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 26 0.2 0.2 0.4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 27 0.2 0.2 0.8 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 28 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 29 0.2 1.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.4 0.2 30 0.2 0.8 0.2 0.2 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 31 0.2 --0.2 0.2 --0.2 --0.2 --0.2 0.2 -------------------------------------------------------------------------------MEAN 0.2 0.4 0.3 0.2 0.3 0.3 0.2 0.2 0.2 0.3 0.3 0.2 MAX 0.2 2.4 2.9 0.2 1.9 1.4 0.2 0.2 0.2 0.4 1.4 0.2 MIN 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.27 MAX 2.91 MIN 0.25 FCDMC Annual Surface Water Report, Water Year 2020 Page 894 Upper Trilby Wash, ID #73807 Site Data LOCATION Located about 3 miles north of Castle Hot Springs Road DRAINAGE AREA 3.0 mi2 STREAM TYPE Natural Stream JURISDICTION Yavapai County, Arizona WATERSHED Trilby SECTION/TOWNSHIP/RANGE S12 T7N R3W LATITUDE N 33° 57' 37.5" | +33.96042 LONGITUDE W 112° 31' 45.3" | ‐112.52925 STREAMGAGE INSTALLATION DATE 09/26/2001 ‐ WY 2001 AVAILABLE PERIOD OF RECORD (POR) 09/26/2001 ‐ Current LENGTH OF AVAILABLE POR DATA 19.01 Years | 6,945 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.90 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 3,030.53 feet NAVD88 POINT OF ZERO FLOW 1.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 412 cfs | 2.40 feet | 07/18/2015 FCDMC Annual Surface Water Report, Water Year 2020 Page 895 Watershed Map Upper Trilby Wash - water year peaks 450 Discharge (cfs) 400 350 300 250 200 150 100 50 0 2000 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 896 2020 2025 WY2020 Events Date of Peak 11/29/2019 03/12/2020 03/12/2020 03/12/2020 03/12/2020 03/18/2020 Peak Gage Height 1.11 1.41 1.24 1.06 1.36 1.01 Peak Discharge (cfs) 13 41 28 9 44 5 Hydrograph of peak WY 2020 flow event, 03/12/2020 Flood Flow Frequency Flood Flow Frequency N=19, HEC‐WRC computation (based on 19 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 23 108 238 453 927 1,480 NOTE: These results are based on very limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 897 Upper Trilby Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 --12 8 13 5 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 1 0 0 0 13 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 13 0 0 0 44 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 1 0 0 0 26 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 14 MEAN 0 MAX 44 MIN 0 AC_FT 27 FCDMC Annual Surface Water Report, Water Year 2020 Page 898 UPRR Underpass at First Avenue, ID #3107 Site Data LOCATION Near First Avenue and Jackson Street DRAINAGE AREA None STREAM TYPE Roadway Underpass JURISDICTION Phoenix, Arizona WATERSHED Lower Arizona Canal Diversion Channel SECTION/TOWNSHIP/RANGE S08 T1N R3E LATITUDE N 33° 26' 39.4" | +33.44429 LONGITUDE W 112° 04' 29.0" | ‐112.07472 STREAMGAGE INSTALLATION DATE 05/30/2017 – WY2017 AVAILABLE PERIOD OF RECORD (POR) 05/30/2017 – Current LENGTH OF AVAILABLE POR DATA 3.34 Years | 1,220 Days DATA GAPS IN POR None STAGE GAGE ELEVATION ‐9.83 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 0.00 feet Gage Height MINIMUM ROADWAY ELEVATION 0.0 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 899 Location Map UPRR Underpass at 1st Ave - water year peaks Stage (feet) 10 5 0 -5 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 900 2025 WY2020 Events Date of Peak 10/01/2019 06/18/2020 Peak Gage Height (feet) ‐0.82 2.05 Peak Volume (ac‐ft) 0.0 0.5 Hydrograph of peak WY 2020 impoundment event, June 2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 901 Percent Spillway Capacity UPRR Underpass at First Avenue, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 -0.9 -1.3 -0.8 -0.8 -1.1 -0.8 -1.3 -1.9 -2.3 -6.0 -3.1 -8.1 2 -0.8 -1.3 -0.8 -0.8 -1.1 -0.8 -1.3 -1.9 -2.3 -7.1 -3.2 -8.1 3 -0.8 -1.3 -0.8 -0.8 -1.1 -0.9 -1.3 -1.9 -2.3 -6.3 -2.8 -8.1 4 -0.9 -1.3 -0.8 -0.9 -1.1 -0.9 -1.3 -1.9 -2.3 -6.1 -2.5 -8.1 5 -0.8 -1.3 -0.9 -0.9 -1.2 -0.9 -1.3 -1.9 -2.3 -6.0 -2.6 -8.1 6 -0.8 -1.4 -0.9 -1.0 -1.2 -1.0 -1.4 -1.9 -2.3 -6.0 -2.7 -8.1 7 -0.8 -1.4 -1.0 -1.0 -1.2 -1.0 -1.4 -2.0 -2.3 -5.3 -5.8 -8.1 8 -0.9 -1.4 -0.8 -1.1 -1.2 -1.1 -1.4 -2.0 -2.3 -4.0 -8.0 -8.1 9 -0.9 -1.4 -0.8 -1.1 -1.2 -1.1 -1.4 -2.0 -2.3 -4.2 -8.1 -8.1 10 -0.9 -1.4 -0.8 -1.1 -1.2 -1.1 -1.5 -2.0 -2.4 -4.4 -8.1 -8.1 11 -0.9 -1.4 -0.8 -1.1 -0.8 -0.8 -1.5 -2.0 -2.4 -4.5 -8.1 -8.1 12 -0.9 -1.4 -0.8 -1.2 -0.8 -0.8 -1.5 -2.0 -2.4 -4.5 -8.1 -8.1 13 -0.9 -1.4 -0.8 -1.2 -0.8 -0.8 -1.6 -2.1 -2.4 -4.5 -8.1 -8.1 14 -1.0 -1.4 -0.9 -1.2 -0.8 -0.8 -1.6 -2.1 -2.4 -5.5 -8.1 -8.1 15 -1.0 -1.5 -0.9 -1.2 -0.8 -0.8 -1.6 -2.1 -2.4 -6.2 -8.1 -8.1 16 -1.0 -1.5 -1.0 -1.3 -0.8 -0.8 -1.6 -2.1 -2.4 -6.0 -8.1 -8.1 17 -1.0 -1.5 -1.1 -1.3 -0.8 -0.8 -1.7 -2.1 -1.6 -7.3 -8.1 -8.1 18 -1.0 -1.5 -1.1 -1.3 -0.9 -0.8 -1.7 -2.1 -2.8 -7.2 -8.1 -8.1 19 -1.1 -1.2 -1.2 -1.3 -0.9 -0.8 -1.7 -2.1 -6.0 -7.2 -8.1 -8.1 20 -1.1 -0.8 -1.2 -1.3 -1.0 -0.8 -1.7 -2.2 -6.0 -3.2 -8.1 -8.1 21 -1.1 -0.8 -1.2 -0.9 -1.1 -0.8 -1.7 -2.2 -6.0 -2.0 -8.1 -8.1 22 -1.1 -0.8 -1.2 -0.8 -0.9 -0.8 -1.7 -2.2 -6.0 -1.2 -8.1 -8.1 23 -1.1 -0.8 -1.2 -0.8 -0.8 -0.8 -1.7 -2.2 -6.0 -1.8 -8.1 -8.1 24 -1.1 -0.8 -0.9 -0.8 -0.8 -0.9 -1.8 -2.2 -6.0 -2.0 -8.1 -8.1 25 -1.1 -0.8 -0.8 -0.9 -0.8 -1.0 -1.8 -2.2 -6.0 -1.8 -8.1 -8.1 26 -1.2 -0.8 -0.8 -0.9 -0.8 -1.0 -1.8 -2.2 -6.0 -2.1 -8.1 -8.1 27 -1.2 -0.9 -0.8 -1.0 -0.8 -1.1 -1.7 -2.2 -6.0 -2.3 -8.1 -8.1 28 -1.2 -1.0 -0.8 -1.0 -0.8 -1.1 --- -2.2 -6.0 -2.4 -8.1 -8.1 29 -1.2 -0.8 -0.8 -1.0 -0.8 -1.1 --- -2.2 -6.0 -2.6 -8.1 -8.1 30 -1.2 -0.8 -0.8 -1.1 --- -1.2 -1.9 -2.2 -6.0 -2.8 -8.1 -8.1 31 -1.3 --- -0.8 -1.1 --- -1.2 --- -2.3 --- -3.0 -8.1 -------------------------------------------------------------------------------MEAN -1.0 -1.2 -0.9 -1.0 -1.0 -0.9 -1.6 -2.1 -3.8 -4.4 -7.0 -8.1 MAX -0.8 -0.7 -0.7 -0.7 -0.7 -0.7 -1.2 -1.9 2.0 0.8 -2.4 -8.1 MIN -1.3 -1.5 -1.2 -1.3 -1.2 -1.2 -1.9 -2.3 -7.0 -9.7 -9.3 -8.1 -----------------------------------------------------------------------------WTR YR 2020 MEAN -2.74 MAX 2.05 MIN -9.74 FCDMC Annual Surface Water Report, Water Year 2020 Page 902 UPRR Underpass at Central Avenue, ID #3207 Site Data LOCATION Near Central Avenue and Jackson Street DRAINAGE AREA None STREAM TYPE Roadway Underpass JURISDICTION Phoenix, Arizona WATERSHED Lower Arizona Canal Diversion Channel SECTION/TOWNSHIP/RANGE S08 T1N R3E LATITUDE N 33° 26' 38.9" | +33.44413 LONGITUDE W 112° 04' 25.5" | ‐112.07376 STREAMGAGE INSTALLATION DATE 05/30/2017 – WY2017 AVAILABLE PERIOD OF RECORD (POR) 05/30/2017 – Current LENGTH OF AVAILABLE POR DATA 3.34 Years | 1,220 Days DATA GAPS IN POR None STAGE GAGE ELEVATION ‐5.00 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 0.00 feet Gage Height MINIMUM ROADWAY ELEVATION 0.0 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 903 Location Map Stage (feet) UPRR Underpass at Central Ave - water year peaks 15 13 11 9 7 5 3 1 -1 -3 -5 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 904 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Volume (ac‐ft) 11/29/2019 ‐2.83 0.0 Hydrograph of peak WY 2020 impoundment event, 11/29/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 905 Percent Spillway Capacity UPRR Underpass at Central Avenue, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 -3.7 -4.7 -4.0 -4.0 -4.6 -4.3 -4.3 -4.8 -4.9 -5.0 -5.0 -5.0 2 -3.7 -4.7 -4.1 -4.1 -4.7 -4.4 -4.3 -4.8 -5.0 -5.0 -5.0 -5.0 3 -3.8 -4.7 -4.2 -4.2 -4.7 -4.4 -4.4 -4.8 -5.0 -5.0 -5.0 -5.0 4 -3.9 -4.7 -4.3 -4.3 -4.7 -4.5 -4.4 -4.8 -5.0 -5.0 -5.0 -5.0 5 -3.9 -4.7 -4.3 -4.3 -4.7 -4.5 -4.4 -4.8 -5.0 -5.0 -5.0 -5.0 6 -3.9 -4.7 -4.3 -4.4 -4.7 -4.5 -4.5 -4.8 -5.0 -5.0 -5.0 -5.0 7 -3.9 -4.8 -4.3 -4.4 -4.8 -4.6 -4.5 -4.8 -5.0 -5.0 -5.0 -5.0 8 -4.0 -4.8 -4.1 -4.5 -4.8 -4.6 -4.5 -4.8 -5.0 -5.0 -5.0 -5.0 9 -4.0 -4.8 -4.2 -4.5 -4.8 -4.6 -4.5 -4.8 -5.0 -5.0 -5.0 -5.0 10 -4.0 -4.8 -4.2 -4.5 -4.8 -4.5 -4.6 -4.8 -5.0 -5.0 -5.0 -5.0 11 -4.1 -4.8 -4.3 -4.6 -3.5 -3.5 -4.6 -4.9 -5.0 -5.0 -5.0 -5.0 12 -4.1 -4.8 -4.3 -4.6 -3.8 -3.5 -4.6 -4.8 -5.0 -5.0 -5.0 -5.0 13 -4.1 -4.8 -4.4 -4.7 -4.0 -3.5 -4.6 -4.8 -5.0 -5.0 -5.0 -5.0 14 -4.2 -4.8 -4.4 -4.7 -4.0 -3.4 -4.6 -4.8 -5.0 -5.0 -5.0 -5.0 15 -4.2 -4.8 -4.4 -4.7 -4.1 -3.7 -4.6 -4.9 -5.0 -5.0 -5.0 -5.0 16 -4.2 -4.8 -4.5 -4.7 -4.2 -3.9 -4.7 -4.9 -5.0 -5.0 -5.0 -5.0 17 -4.3 -4.8 -4.5 -4.7 -4.3 -4.0 -4.7 -4.9 -5.0 -5.0 -5.0 -5.0 18 -4.3 -4.8 -4.6 -4.7 -4.4 -3.8 -4.7 -4.9 -5.0 -5.0 -5.0 -5.0 19 -4.3 -4.5 -4.6 -4.7 -4.4 -3.6 -4.7 -4.9 -5.0 -5.0 -5.0 -5.0 20 -4.3 -3.5 -4.6 -4.7 -4.5 -3.8 -4.7 -4.9 -5.0 -5.0 -5.0 -5.0 21 -4.4 -3.6 -4.7 -4.3 -4.5 -3.9 -4.7 -4.9 -5.0 -5.0 -5.0 -5.0 22 -4.4 -3.7 -4.7 -4.3 -3.7 -4.0 -4.7 -4.9 -5.0 -5.0 -5.0 -5.0 23 -4.4 -3.8 -4.7 -4.3 -3.6 -4.0 -4.7 -4.9 -5.0 -5.0 -5.0 -5.0 24 -4.4 -3.9 -3.9 -4.4 -3.9 -4.1 -4.7 -4.9 -5.0 -4.9 -5.0 -5.0 25 -4.4 -4.0 -3.5 -4.4 -3.9 -4.1 -4.7 -4.9 -5.0 -4.5 -5.0 -5.0 26 -4.5 -4.1 -3.5 -4.4 -4.0 -4.1 -4.7 -4.9 -5.0 -4.6 -5.0 -5.0 27 -4.5 -4.1 -3.3 -4.5 -4.1 -4.2 -4.8 -4.9 -5.0 -4.6 -5.0 -5.0 28 -4.5 -4.2 -3.5 -4.5 -4.2 -4.2 -4.8 -4.9 -5.0 -4.8 -5.0 -5.0 29 -4.6 -3.8 -3.8 -4.5 -4.3 -4.2 -4.8 -4.9 -5.0 -5.0 -5.0 -5.0 30 -4.6 -3.9 -3.9 -4.5 --- -4.3 -4.8 -4.9 -5.0 -5.0 -5.0 -5.0 31 -4.7 --- -4.0 -4.6 --- -4.3 --- -4.9 --- -5.0 -5.0 -------------------------------------------------------------------------------MEAN -4.2 -4.4 -4.2 -4.5 -4.3 -4.1 -4.6 -4.9 -5.0 -4.9 -5.0 -5.0 MAX -3.7 -2.8 -2.9 -4.0 -2.9 -2.8 -3.8 -4.8 -4.9 -4.5 -5.0 -5.0 MIN -4.7 -4.8 -4.7 -4.8 -4.8 -4.7 -5.0 -5.0 -5.0 -5.0 -5.0 -5.0 -----------------------------------------------------------------------------WTR YR 2020 MEAN -4.59 MAX -2.83 MIN -5.00 FCDMC Annual Surface Water Report, Water Year 2020 Page 906 US60 at Gold Canyon, ID #36907 Site Data LOCATION Located near Superstition Mountain Drive and US60 in Gold Canyon DRAINAGE AREA 9.25 mi2 STREAM TYPE Natural wash flows at a culvert JURISDICTION Pinal County, Arizona WATERSHED Upper East Maricopa Floodway SECTION/TOWNSHIP/RANGE S07 T1S R9E LATITUDE N 33° 21' 53.5" | +33.36486 LONGITUDE W 111° 28' 32.8" | ‐111.47579 STREAMGAGE INSTALLATION DATE 05/11/2016 ‐ WY 2016 AVAILABLE PERIOD OF RECORD (POR) 05/11/2016 ‐ Current LENGTH OF AVAILABLE POR DATA 4.39 Years | 1,604 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.15 feet Gage Height STAFF GAGES None CREST STAGE GAGES One ZERO GAGE HEIGHT ELEVATION 1,739.03 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 1,258 cfs | 4.06 feet GH | 08/09/2016 FCDMC Annual Surface Water Report, Water Year 2020 Page 907 Watershed Map US60 at Gold Canyon - water year peaks 1,800 Discharge (cfs) 1,600 1,400 1,200 1,000 800 600 400 200 0 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 908 2025 WY2020 Events Date of Peak 11/20/2019 11/29/2019 Peak Gage Height 1.12 0.94 Peak Discharge (cfs) 70 31 Hydrograph of peak WY 2020 flow event, 11/20/2019 Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 909 US60 at Gold Canyon, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 --18 19 20 2 21 22 23 24 25 26 27 28 29 2 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 3 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 70 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 7 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 3 MEAN 0 MAX 70 MIN 0 AC_FT 7 FCDMC Annual Surface Water Report, Water Year 2020 Page 910 Vekol Wash, ID #74507 Site Data LOCATION Near I‐8 and Vekol Valley Road DRAINAGE AREA 147.7 mi2 STREAM TYPE Natural Stream JURISDICTION Maricopa County, Arizona WATERSHED Vekol SECTION/TOWNSHIP/RANGE S03 T7S R1E LATITUDE N 32° 50' 35.3" | +32.84313 LONGITUDE W 112° 15' 07.5" | ‐112.25207 STREAMGAGE INSTALLATION DATE 03/07/1990 ‐ WY 1990 AVAILABLE PERIOD OF RECORD (POR) 03/07/1990 ‐ Current LENGTH OF AVAILABLE POR DATA 30.57 Years | 11,166 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 4.95 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 2 (at gage cross section) ZERO GAGE HEIGHT ELEVATION 1,719.89 feet NAVD88 POINT OF ZERO FLOW 4.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 10,100 cfs | 10.10 feet | 08/27/2010 FCDMC Annual Surface Water Report, Water Year 2020 Page 911 Watershed Map Vekol Wash - water year peaks 12,000 Discharge (cfs) 10,000 8,000 6,000 4,000 2,000 0 1990 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 912 2015 2020 2025 WY2020 Events Date of Peak 03/14/2020 03/15/2020 03/16/2020 Peak Gage Height (feet) 5.26 5.31 5.26 Peak Discharge (cfs) 180 191 180 Hydrograph of peak WY 2020 flow event, 03/15/2020 Flood Flow Frequency Flood Flow Frequency N=31, HEC‐WRC computation (based on 31 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 954 2,640 4,370 6,520 10,100 13,400 NOTE: These results are based on limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 913 Vekol Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 --2 --3 --4 ----5 --6 --7 --8 9 10 --11 --12 --13 14 20 15 25 16 12 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 57 0 0 0 0 0 0 MEAN 0 0 0 0 0 2 0 0 0 0 0 0 MAX 0 0 0 0 0 191 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 114 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 57 MEAN 0 MAX 191 MIN 0 AC_FT 114 FCDMC Annual Surface Water Report, Water Year 2020 Page 914 Vineyard FRS, ID #37007 Site Data LOCATION Located south of Apache Junction east of Ironwood Road DRAINAGE AREA 53.7 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Pinal County, Arizona WATERSHED Upper East Maricopa Floodway SECTION/TOWNSHIP/RANGE S09 T1S R8E LATITUDE N 33° 21' 03.3" | +33.35091 LONGITUDE W 111° 32' 34.2" | ‐111.54282 STREAMGAGE INSTALLATION DATE 11/02/1983 ‐ WY 1984 AVAILABLE PERIOD OF RECORD (POR) 11/09/1987 ‐ Current LENGTH OF AVAILABLE POR DATA 32.90 Years | 12,015 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.20 feet Gage Height STAFF GAGES 5 ZERO GAGE HEIGHT ELEVATION 1,564.14 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY ELEVATION 11.3 feet Gage Height (South Spillway) TOP OF DAM ELEVATION 16.2 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 915 Watershed Map Vineyard FRS - water year peaks Volume (acre-feet) 3,500 3,000 2,500 2,000 1,500 1,000 500 0 1985 1990 1995 2000 2005 Axis Title FCDMC Annual Surface Water Report, Water Year 2020 Page 916 2010 2015 2020 2025 WY2020 Events* Date of Peak Peak Gage Height (feet) Peak Volume (ac‐ft) 11/21/2019 1.30 191.9 11/29/2019 1.90 310.4 *NOTE: Due to unfinished construction, peak volumes are greater than actual. Hydrograph of peak WY 2020 impoundment event, 11/29/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 917 Percent Spillway Capacity 4.4 6.9 Vineyard FRS, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 --17 18 19 20 21 6 22 2 23 24 25 26 27 28 29 12 30 4 --31 ---------------------------------------------------------------------------------------TOTAL 0 23 0 0 0 0 0 0 0 0 0 0 MEAN 0 1 0 0 0 0 0 0 0 0 0 0 MAX 0 23 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 46 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 23 MEAN 0 MAX 23 MIN 0 AC_FT 46 FCDMC Annual Surface Water Report, Water Year 2020 Page 918 Vineyard FRS, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 --17 18 19 20 21 93 22 32 23 24 25 26 27 28 29 168 30 63 --31 ---------------------------------------------------------------------------------------MEAN 0 12 0 0 0 0 0 0 0 0 0 0 MAX 0 310 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 1 MAX 310 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 919 Vineyard FRS, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 5 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 6 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 7 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 8 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 9 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 10 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 11 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 12 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 13 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 14 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 15 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 16 0.2 0.2 0.2 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 17 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 18 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 19 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 20 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 21 0.2 0.7 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 22 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 23 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 24 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 25 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 26 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 27 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 28 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 29 0.2 1.1 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 30 0.2 0.6 0.2 0.2 --0.2 0.2 0.2 0.2 0.2 0.2 0.2 31 0.2 --0.2 0.2 --0.2 --0.2 --0.2 0.2 -------------------------------------------------------------------------------MEAN 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 MAX 0.2 1.9 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 MIN 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0.21 MAX 1.90 MIN 0.20 FCDMC Annual Surface Water Report, Water Year 2020 Page 920 Vulture Mine Road, ID #47007 Site Data LOCATION At Vulture Mine Road and Steinway Drive DRAINAGE AREA 0.13 mi2 STREAM TYPE Culvert ‐ Natural Stream JURISDICTION Wickenburg, Arizona WATERSHED Lower Hassayampa SECTION/TOWNSHIP/RANGE S15 T7N R5W LATITUDE N 33° 57' 08.4" | +33.95233 LONGITUDE W 112° 46' 18.4" | ‐112.77179 STREAMGAGE INSTALLATION DATE 10/25/2005 ‐ WY 2006 AVAILABLE PERIOD OF RECORD (POR) 10/25/2005 ‐ Current LENGTH OF AVAILABLE POR DATA 14.93 Years | 5,455 Days DATA GAPS IN POR None STAGE GAGE TYPE Pressure Transducer STAGE GAGE ELEVATION 0.70 feet Gage Height STAFF GAGES 1 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 2,311.45 feet NAVD88 POINT OF ZERO FLOW 1.53 feet Gage Height EXTREME FOR PERIOD OF RECORD 159 cfs | 3.58 feet | 08/03/2014 FCDMC Annual Surface Water Report, Water Year 2020 Page 921 Watershed Map Vulture Mine Road - water year peaks 180 Discharge (cfs) 160 140 120 100 80 60 40 20 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 922 2020 2025 WY2020 Events Date of Peak 11/20/2019 02/11/2020 03/12/2020 03/12/2020 03/13/2020 03/13/2020 03/18/2020 Peak Gage Height 1.17 1.07 0.92 0.90 1.05 1.02 0.95 Peak Discharge (cfs) 10 8 6 6 8 8 7 Hydrograph of peak WY 2020 flow event, 11/20/2019 Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 923 Vulture Mine Road, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 --2 --3 --4 5 6 --7 --8 --9 10 11 1 12 --1 13 --1 14 15 16 17 18 --1 19 20 1 21 22 23 24 25 26 --27 --28 --29 --30 ----31 ---------------------------------------------------------------------------------------TOTAL 0 1 0 0 1 4 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 10 0 0 8 8 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 2 0 0 1 7 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 5 MEAN 0 MAX 10 MIN 0 AC_FT 11 FCDMC Annual Surface Water Report, Water Year 2020 Page 924 Wagner Wash at Sun Valley Parkway, ID #44707 Site Data LOCATION On Sun Valley Parkway near the Bell Road alignment DRAINAGE AREA 27.7 mi2 STREAM TYPE Culvert ‐ Natural Stream JURISDICTION Buckeye, Arizona WATERSHED Lower Hassayampa SECTION/TOWNSHIP/RANGE S05 T3N R4W LATITUDE N 33° 38' 07.0" | +33.63527 LONGITUDE W 112° 41' 25.9" | ‐112.69053 STREAMGAGE INSTALLATION DATE 02/16/2017 – WY2017 AVAILABLE PERIOD OF RECORD (POR) 02/16/2017 – Current LENGTH OF AVAILABLE POR DATA 3.62 Years | 1,323 Days DATA GAPS IN POR None STAGE GAGE TYPE Pressure Transducer STAGE GAGE ELEVATION 0.05 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,434.80 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 1,358 cfs | 2.97 feet Gage Height | 08/16/2018 FCDMC Annual Surface Water Report, Water Year 2020 Page 925 Watershed Map Discharge (cfs) Wagner Wash at SVP - water year peaks 2000 1800 1600 1400 1200 1000 800 600 400 200 0 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 926 2025 WY2020 Events Date of Peak Peak Gage Height 03/13/2020 0.65 Peak Discharge (cfs) ` 2 Hydrograph of peak WY 2020 flow event, 03/13/2020 Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 927 Wagner Wash at Sun Valley Parkway, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 2 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 2 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 928 Waterman Wash at Rainbow Valley Road, ID #83307 Site Data LOCATION At Rainbow Valley Road and Queen Creek Road DRAINAGE AREA 362 mi2 STREAM TYPE Natural Stream JURISDICTION Goodyear, Arizona WATERSHED Waterman SECTION/TOWNSHIP/RANGE S10 T2S R2W LATITUDE N 33° 15' 42.2" | +33.26173 LONGITUDE W 112° 26' 38.5" | ‐112.44404 STREAMGAGE INSTALLATION DATE 03/18/1999 ‐ WY 1999 AVAIALBLE PERIOD OF RECORD 03/18/1999 ‐ Current LENGTH OF AVAILABLE POR DATA 21.54 Years | 7,868 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 1.00 feet Gage Height STAFF GAGES 1 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,009.85 feet NAVD88 POINT OF ZERO FLOW 0.0 feet Gage Height EXTREME FOR PERIOD OF RECORD 5,713 cfs | 10.82 feet | 07/30/2016 FCDMC Annual Surface Water Report, Water Year 2020 Page 929 Watershed Map Waterman Wash at Rainbow Valley Road - water year peaks 6,000 Discharge (cfs) 5,000 4,000 3,000 2,000 1,000 0 1995 2000 2005 2010 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 930 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Discharge (cfs) None Hydrograph of peak WY 2020 flow event, No runoff recorded in Water Year 2020. Flood Flow Frequency Flood Flow Frequency N=22, HEC‐WRC computation (based on 22 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 661 2,190 3,500 4,820 6,450 7,550 NOTE: These results are based on very limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 931 Waterman Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 --6 --7 --8 --9 --10 11 --12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 932 Weekes Wash at Baseline Road, ID #39207 Site Data LOCATION Baseline Road between Idaho and Tomahawk Roads DRAINAGE AREA 11.9 mi2 STREAM TYPE Engineered channel of natural stream JURISDICTION Apache Junction, Arizona WATERSHED Upper East Maricopa Floodway SECTION/TOWNSHIP/RANGE S04 T1S R8E LATITUDE N 33° 22' 43.7" | +33.37881 LONGITUDE W 111° 32' 15.1" | ‐111.53752 STREAMGAGE INSTALLATION DATE 05/27/2008 ‐ WY 2008 AVAILABLE PERIOD OF RECORD (POR) 05/27/2008 ‐ Current LENGTH OF AVAILABLE POR DATA 12.35 Years | 4,510 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.20 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,620.36 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height EXTREME FOR PERIOD OF RECORD 1,624 cfs | 7.24 feet Gage Height | 07/24/2017 FCDMC Annual Surface Water Report, Water Year 2020 Page 933 Watershed Map Weekes Wash at Baseline Road - water year peaks 1,800 Discharge (cfs) 1,600 1,400 1,200 1,000 800 600 400 200 0 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 934 2020 2025 WY2020 Events Date of Peak 11/19/2019 11/20/2019 11/21/2019 11/21/2019 11/29/2019 12/25/2019 12/27/2019 03/11/2020 03/13/2020 03/18/2020 08/20/2020 08/29/2020 Peak Gage Height 0.49 0.84 0.74 0.92 0.97 0.84 0.39 0.52 0.44 0.47 0.57 0.44 Peak Discharge (cfs) 16 52 41 60 65 52 8 19 12 14 23 12 Hydrograph of peak WY 2020 flow event, 11/29/2019 Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 935 Weekes Wash at Baseline Road, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 2 12 13 1 14 15 16 17 18 3 19 1 20 5 1 21 9 22 23 24 25 6 26 27 1 28 29 11 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 25 7 0 0 5 0 0 0 0 2 0 MEAN 0 1 0 0 0 0 0 0 0 0 0 0 MAX 0 65 52 0 0 19 0 0 0 0 23 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 50 14 0 0 11 0 0 0 0 3 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 39 MEAN 0 MAX 65 MIN 0 AC_FT 77 FCDMC Annual Surface Water Report, Water Year 2020 Page 936 White Tanks FRS #3, ID #87307 Site Data LOCATION Located on the eastern foothills of the White Tank Mountains, north of Northern Avenue DRAINAGE AREA 20.5 mi2 STREAM TYPE Impounding of natural drainage JURISDICTION Maricopa County, Arizona WATERSHED White Tanks B SECTION/TOWNSHIP/RANGE S09 T2N R2W LATITUDE N 33° 31' 56.0" | +33.53322 LONGITUDE W 112° 28' 19.2" | ‐112.47199 STREAMGAGE INSTALLATION DATE 03/12/1986 ‐ WY 1986 AVAIALBLE PERIOD OF RECORD 01/01/1988 ‐ Current LENGTH OF AVAILABLE POR DATA 32.75 Years | 11,962 Days DATA GAPS IN POR 12/14/2005 ‐ 06/18/2008 STAGE GAGE ELEVATION 1.50 feet Gage Height STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,191.00 feet NAVD88 POINT OF ZERO FLOW (CONTROLLED) 0.00 feet Gage Height POINT OF ZERO FLOW (CONTROLLED BYPASS OUTLET) 6.0 feet Gage Height POINT OF ZERO FLOW (UNCONTROLLED) 9.0 feet Gage Height (currently blocked) SPILLWAY ELEVATION 21.0 feet Gage Height TOP OF DAM ELEVATION 27.0 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 937 Watershed Map White Tanks FRS #3 - water year peaks Volume (acre-feet) 700 600 500 400 300 200 100 0 1985 1990 1995 2000 2005 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 938 2010 2015 2020 2025 WY2020 Events Date of Peak Peak Gage Height (feet) Peak Volume (ac‐ft) Percent Spillway Capacity 11/20/2019 2.04 119.0 3.5 Hydrograph of peak WY 2020 impoundment event, 11/20/2019 FCDMC Annual Surface Water Report, Water Year 2020 Page 939 White Tanks FRS #3, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 --6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 --23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 940 White Tanks FRS #3, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 --6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 97 21 106 22 --23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 7 0 0 0 0 0 0 0 0 0 0 MAX 0 119 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 1 MAX 119 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 941 White Tanks FRS #3, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 2 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 3 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 4 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 --1.5 1.5 6 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 7 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 8 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 9 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 10 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 11 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 12 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 13 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 14 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 15 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 16 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 17 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 18 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 19 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 20 1.5 1.7 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 21 1.5 1.7 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 22 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 --1.5 1.5 23 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 24 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 25 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 26 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 27 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 28 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 29 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 30 1.5 1.5 1.5 1.5 --1.5 1.5 1.5 1.5 1.5 1.5 1.5 31 1.5 --1.5 1.5 --1.5 --1.5 --1.5 1.5 -------------------------------------------------------------------------------MEAN 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 MAX 1.5 2.0 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 MIN 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 -----------------------------------------------------------------------------WTR YR 2020 MEAN 1.50 MAX 2.04 MIN 1.50 FCDMC Annual Surface Water Report, Water Year 2020 Page 942 White Tanks FRS #4, ID #87807 Site Data LOCATION Located south of I‐10 and west of Jackrabbit Trail DRAINAGE AREA 18.6 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Buckeye, Arizona WATERSHED White Tanks B SECTION/TOWNSHIP/RANGE S05 T1N R2W LATITUDE N 33° 27' 05.2" | +33.45145 LONGITUDE W 112° 29' 57.6" | ‐112.48268 STREAMGAGE INSTALLATION DATE 01/09/1986 ‐ WY 1986 AVAILABLE PERIOD OF RECORD (POR) 10/01/1987 ‐ Current LENGTH OF AVAILABLE POR DATA 33.00 Years | 12,054 Days DATA GAPS IN POR 06/01/2011 ‐ 11/16/2011 STAFF GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,030.00 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height (gated outlet) SPILLWAY ELEVATION 1,053.00 feet NAVD88 TOP OF DAM ELEVATION 1,059.00 feet NAVD88 FCDMC Annual Surface Water Report, Water Year 2020 Page 943 Watershed Map White Tanks FRS #4 - water year peaks Volume (acre-feet) 700 600 500 400 300 200 100 0 1985 1990 1995 2000 2005 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 944 2010 2015 2020 2025 WY2020 Events Date of Peak 11/20/2019 11/29/2019 03/16/2020 03/19/2020 07/23/2020 Peak Gage Height (feet) 0.19 0.22 1.65 6.41 0.70 Peak Volume (ac‐ft) 0.0 0.0 4.6 66.6 0.2 Hydrograph of peak WY 2020 flow event, 03/19/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 945 Percent Spillway Capacity 0.0 0.0 0.4 4.5 0.1 White Tanks FRS #4, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 946 White Tanks FRS #4, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 2 17 3 18 15 19 62 20 48 21 37 22 28 23 20 24 14 25 9 26 6 27 4 28 2 29 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 8 0 0 0 0 0 0 MAX 0 0 0 0 0 67 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 1 MAX 67 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 947 White Tanks FRS #4, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 -0.6 -0.6 -0.4 -0.6 -0.6 -0.6 0.0 -0.6 -0.6 -0.6 -0.6 -0.6 2 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.2 -0.6 -0.6 -0.6 -0.6 -0.6 3 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.3 -0.6 -0.6 -0.6 -0.6 -0.6 4 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.4 -0.6 -0.6 -0.6 -0.6 -0.6 5 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.4 -0.6 -0.6 -0.6 -0.6 -0.6 6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.5 -0.6 -0.6 -0.6 -0.6 -0.6 7 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.5 -0.6 -0.6 -0.6 -0.6 -0.6 8 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.5 -0.6 -0.6 -0.6 -0.6 -0.6 9 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 10 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 11 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 12 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 13 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 14 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 15 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 16 -0.6 -0.6 -0.6 -0.6 -0.6 0.5 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 17 -0.6 -0.6 -0.6 -0.6 -0.6 1.3 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 18 -0.6 -0.6 -0.6 -0.6 -0.6 2.2 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 19 -0.6 -0.6 -0.6 -0.6 -0.6 6.2 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 20 -0.6 -0.1 -0.6 -0.6 -0.6 5.5 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 21 -0.6 -0.1 -0.6 -0.6 -0.6 4.8 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 22 -0.6 -0.5 -0.6 -0.6 -0.6 4.1 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 23 -0.6 -0.6 -0.6 -0.6 -0.6 3.4 -0.6 -0.6 -0.6 -0.3 -0.6 -0.6 24 -0.6 -0.6 -0.6 -0.6 -0.6 2.9 -0.6 -0.6 -0.6 0.3 -0.6 -0.6 25 -0.6 -0.6 -0.6 -0.6 -0.6 2.3 -0.6 -0.6 -0.6 -0.2 -0.6 -0.6 26 -0.6 -0.6 -0.6 -0.6 -0.6 1.9 -0.6 -0.6 -0.6 -0.5 -0.6 -0.6 27 -0.6 -0.6 -0.6 -0.6 -0.6 1.4 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 28 -0.6 -0.6 -0.6 -0.6 -0.6 1.1 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 29 -0.6 -0.0 -0.6 -0.6 -0.6 0.8 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 30 -0.6 -0.0 -0.6 -0.6 --0.5 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 31 -0.6 --- -0.6 -0.6 --0.2 --- -0.6 --- -0.6 -0.6 -------------------------------------------------------------------------------MEAN -0.6 -0.5 -0.6 -0.6 -0.6 1.0 -0.5 -0.6 -0.6 -0.5 -0.6 -0.6 MAX -0.6 0.2 -0.3 -0.6 -0.6 6.4 0.1 -0.6 -0.6 0.7 -0.6 -0.6 MIN -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -0.6 -----------------------------------------------------------------------------WTR YR 2020 MEAN -0.45 MAX 6.41 MIN -0.60 FCDMC Annual Surface Water Report, Water Year 2020 Page 948 White Tank Outfall Channel, ID #87407 Site Data LOCATION At Jackrabbit Trail and Indian School Road DRAINAGE AREA 26.8 mi2 STREAM TYPE Engineered Channel JURISDICTION Buckeye, Arizona WATERSHED White Tanks B SECTION/TOWNSHIP/RANGE S20 T2N R2W LATITUDE N 33° 29' 38.0" | +33.49389 LONGITUDE W 112° 28' 45.4" | ‐112.47929 STREAMGAGE INSTALLATION DATE 12/07/2016 – WY2017 AVAIALBLE PERIOD OF RECORD 12/07/2016 ‐ Current LENGTH OF AVAILABLE POR DATA 3.82 Years | 1,394 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 2.10 feet Gage Height STAFF GAGES 1 CREST STAGE GAGES 0 ZERO GAGE HEIGHT ELEVATION 1,151.71 feet NAVD88 POINT OF ZERO FLOW 1.70 feet Gage Height EXTREME FOR PERIOD OF RECORD 425 cfs | 2.06 feet | 07/23/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 949 Watershed Map Discharge (cfs) White Tanks Outlet Channel - water year peaks 500 450 400 350 300 250 200 150 100 50 0 2015 2020 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 950 2025 WY2020 Events Date of Peak 11/29/2019 03/12/2020 03/12/2020 03/13/2020 03/13/2020 03/18/2020 07/23/2020 Peak Gage Height (feet) 1.36 1.18 1.78 2.04 1.41 2.01 2.06 Peak Discharge (cfs) 9 5 23 38 10 36 425 Hydrograph of peak WY 2020 flow event, 07/23/2020 Flood Flow Frequency There is not enough data to compute a flood flow frequency for this gage station. FCDMC Annual Surface Water Report, Water Year 2020 Page 951 White Tank Outfall Channel, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 37 4 37 5 6 7 8 9 10 11 1 12 121 13 128 14 15 16 17 18 87 19 32 20 21 22 23 71 24 25 26 27 28 29 53 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 53 0 0 74 369 0 0 0 71 0 0 MEAN 0 2 0 0 3 12 0 0 0 2 0 0 MAX 0 239 0 0 148 420 0 0 0 425 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 104 0 0 147 731 0 0 0 142 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 567 MEAN 2 MAX 425 MIN 0 AC_FT 1124 FCDMC Annual Surface Water Report, Water Year 2020 Page 952 Whitlow Ranch Dam, ID #63307 Site Data LOCATION East of Apache Junction near Queen Valley DRAINAGE AREA 143 mi2 STREAM TYPE Dam of natural drainage JURISDICTION Pinal County, Arizona WATERSHED Queen Creek SECTION/TOWNSHIP/RANGE S36 T1S R10E LATITUDE N 33° 17' 56.6" | +33.29906 LONGITUDE W 111° 16' 32.8" | ‐111.27579 STREAMGAGE INSTALLATION DATE 08/02/2000 ‐ WY 2000 AVAILABLE PERIOD OF RECORD (POR) 08/02/2000 ‐ Current LENGTH OF AVAILABLE POR DATA 20.16 Years | 7,365 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 11.70 feet Gage Height STAFF GAGES 25 ZERO GAGE HEIGHT ELEVATION 2,057.75 feet NAVD88 POINT OF ZERO FLOW 0.00 feet Gage Height SPILLWAY ELEVATION 110.4 feet Gage Height TOP OF DAM ELEVATION 143.0 feet Gage Height FCDMC Annual Surface Water Report, Water Year 2020 Page 953 Watershed Map Whitlow Ranch Dam - water year peaks Volume (acre-feet) 8,000 7,000 6,000 5,000 4,000 3,000 2,000 1,000 0 2000 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 954 2020 2025 WY2020 Events Date of Peak 11/29/2019 12/27/2019 03/19/2020 Peak Gage Height (feet) 12.34 12.45 14.14 Peak Volume (ac‐ft) 20.0 20.0 33.0 Hydrograph of peak WY 2020 impoundment event, 03/19/2020 FCDMC Annual Surface Water Report, Water Year 2020 Page 955 Percent Spillway Capacity 0.0 0.0 0.3 Whitlow Ranch Dam, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 --5 --6 --7 --8 --9 --10 11 12 13 14 15 16 17 18 2 19 311 20 21 22 23 24 25 26 27 62 28 103 29 98 30 --31 ---------------------------------------------------------------------------------------TOTAL 0 98 165 0 0 313 0 0 0 0 0 0 MEAN 0 3 5 0 0 10 0 0 0 0 0 0 MAX 0 288 292 0 0 347 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 194 327 0 0 620 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 575 MEAN 2 MAX 347 MIN 0 AC_FT 1141 FCDMC Annual Surface Water Report, Water Year 2020 Page 956 Whitlow Ranch Dam, volume data Volume, in acre-feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 --5 --6 --7 --8 --9 --10 11 12 13 14 15 16 17 18 19 24 20 21 22 23 24 25 26 27 4 28 7 29 6 30 --31 ---------------------------------------------------------------------------------------MEAN 0 0 0 0 0 1 0 0 0 0 0 0 MAX 0 20 20 0 0 33 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 2020 MEAN 0 MAX 33 MIN 0 FCDMC Annual Surface Water Report, Water Year 2020 Page 957 Whitlow Ranch Dam, stage data Depth, in feet, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 2 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 3 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 4 11.7 11.7 11.7 11.7 11.7 --- 11.7 11.7 11.7 11.7 11.7 11.7 5 11.7 11.7 11.7 11.7 11.7 --- 11.7 11.7 11.7 11.7 11.7 11.7 6 11.7 11.7 11.7 11.7 11.7 --- 11.7 11.7 11.7 11.7 11.7 11.7 7 11.7 11.7 11.7 11.7 11.7 --- 11.7 11.7 11.7 11.7 11.7 11.7 8 11.7 11.7 11.7 11.7 11.7 --- 11.7 11.7 11.7 11.7 11.7 11.7 9 11.7 11.7 11.7 11.7 11.7 --- 11.7 11.7 11.7 11.7 11.7 11.7 10 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 12 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 13 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 14 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 15 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 16 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 17 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 18 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 19 11.7 11.7 11.7 11.7 11.7 13.0 11.7 11.7 11.7 11.7 11.7 11.7 20 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 21 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 22 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 23 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 24 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 25 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 26 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 27 11.7 11.7 11.8 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 28 11.7 11.7 11.8 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 29 11.7 11.8 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 30 11.7 11.7 11.7 11.7 --- 11.7 11.7 11.7 11.7 11.7 11.7 11.7 31 11.7 --- 11.7 11.7 --- 11.7 --- 11.7 --- 11.7 11.7 -------------------------------------------------------------------------------MEAN 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 MAX 11.7 12.3 12.5 11.7 11.7 14.1 11.7 11.7 11.7 11.7 11.7 11.7 MIN 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 -----------------------------------------------------------------------------WTR YR 2020 MEAN 11.70 MAX 14.14 MIN 11.70 FCDMC Annual Surface Water Report, Water Year 2020 Page 958 Winters Wash, ID #25507 Site Data LOCATION Located north of Camelback Road and west of 395th Avenue DRAINAGE AREA 27.8 mi2 STREAM TYPE Natural Stream JURISDICTION Maricopa County, Arizona WATERSHED Lower Centennial SECTION/TOWNSHIP/RANGE S18 T2N R6W LATITUDE N 33° 30' 31.5" | +33.50876 LONGITUDE W 112° 54' 44.0" | ‐112.91222 STREAMGAGE INSTALLATION DATE 07/11/2000 ‐ WY 2000 AVAILABLE PERIOD OF RECORD (POR) 07/11/2000 ‐ Current LENGTH OF AVAILABLE POR DATA 20.22 Years | 7,387 Days DATA GAPS IN POR None STAGE GAGE ELEVATION 0.51 feet Gage Height STAFF GAGES 0 CREST STAGE GAGES 1 ZERO GAGE HEIGHT ELEVATION 1,120.00 feet NAVD88 POINT OF ZERO FLOW 0.2 feet Gage Height EXTREME FOR PERIOD OF RECORD 510 cfs | 3.30 feet | 07/29/2003 FCDMC Annual Surface Water Report, Water Year 2020 Page 959 Watershed Map Winters Wash - water year peaks 600 Discharge (cfs) 500 400 300 200 100 0 2000 2005 2010 2015 Water Year FCDMC Annual Surface Water Report, Water Year 2020 Page 960 2020 2025 WY2020 Events Date of Peak 03/12/2020 03/12/2020 08/30/2020 Peak Gage Height (feet) 1.10 1.80 1.85 Peak Discharge (cfs) 86 279 296 Hydrograph of peak WY 2020 flow event, 08/30/2020 Flood Flow Frequency Flood Flow Frequency N=21, HEC‐WRC computation (based on 21 years of data) 2‐year 5‐year 10‐year 20‐year 50‐year 100‐year 182 362 498 634 817 955 NOTE: These results are based on very limited data. FCDMC Annual Surface Water Report, Water Year 2020 Page 961 Winters Wash, runoff data Discharge, in cfs, Water Year October 2019 to September 2020 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 --3 4 5 6 7 8 --9 10 11 --4 12 --21 13 --16 14 15 16 17 18 --19 20 --21 22 23 24 25 26 27 28 29 5 30 --27 31 --------4 -------------------------------------------------------------------------------TOTAL 0 5 0 0 4 36 0 0 0 0 31 0 MEAN 0 0 0 0 0 1 0 0 0 0 1 0 MAX 0 28 0 0 34 279 0 0 0 0 296 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 10 0 0 8 72 0 0 0 0 61 0 -----------------------------------------------------------------------------WTR YR 2020 TOTAL 76 MEAN 0 MAX 296 MIN 0 AC_FT 151 FCDMC Annual Surface Water Report, Water Year 2020 Page 962 End of Report FCDMC Annual Surface Water Report, Water Year 2020 Page 963