ANNUAL HYDROLOGIC DATA REPORT VOLUME II SURFACE WATER DATA WATER YEAR 1997 PREFACE This publication is Volume II of a five volume report containing hydrologic data collected by the Flood Control District Of Maricopa County during Water Year 1997. The four other volumes are: Volume I – Precipitation Data, Volume III – Volunteer Observer Rainfall Data, Volume IV – Stormwater Quality Data, and Volume V – Weather Station Data and Alluvial Fan Watershed Data. Volume II 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, and La Paz Counties. The surface water data contained in this report was collected, compiled and edited by the Flood Warning and Data Collection Branch of the Engineering Division. Data includes 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. Also included starting in this year’s report are maximum discharges, pool levels, and storage volumes for flood events of interest at each site. Additionally, a few hydrographs from significant floods are also presented. Furthermore, flood flow frequency tables have been added at sites where information is available either from statistical analysis of gage records or from rainfall-runoff models. These estimates of flood flow frequency do not necessarily correspond to regulatory discharges for the channel reaches near the gage sites. Always refer to official regulatory documents such as the Flood Insurance Study, Maricopa County and Incorporated Areas published by the Federal Emergency Management Agency (FEMA) for such discharge information. The information contained herein is as accurate and complete as possible within the limitations of real-time data collection technology currently available. Wherever possible, footnotes have been included to identify questionable data. Reliance upon the accuracy, reliability, and authority of this information is solely the responsibility of the user. Revisions to any of these data for any reason will be published in the following years’ reports immediately following the data for the current year for the site where the revisions have been made. Additional copies of this report may be purchased from: Flood Control District of Maricopa County 2801 W. Durango Street Phoenix, Arizona 85009 (602) 506-1501 or downloaded from the World Wide Web at http://www.fcd.maricopa.gov/alert/alert.htm. i TABLE OF CONTENTS Preface..................................................................................................................... i Contents...................................................................................................................ii Introduction .............................................................................................................iii Definition of Terms ..................................................................................................vi Surface Water Gage Location Map ............................................................................ix List of Stations Sorted By Sensor ID#.........................................................................x List of Stations Sorted Alphabetically ....................................................................... xiii Summary of Significant Streamflow Events .............................................................. xvi Surface Water Streamflow Data ..........................................................................Tab 1 Pool Levels at Storage Facilities...........................................................................Tab 2 Storage Volumes at Storage Facilities ...................................................................Tab 3 Comment/Errata Sheet...................................................................................Appendix ii INTRODUCTION The Flood Control District of Maricopa County in cooperation with local, state, and federal agencies collects a large amount of data pertaining to surface water runoff in and around Maricopa County. These data provide a valuable resource for information not otherwise furnished by the traditional sources of this type of material. To make these data readily available to interested parties outside the Flood Control District, the data are published annually in this report entitled "FCDMC ALERT System Annual Surface Water Report." This report includes records on discharge at uncontrolled stream gages and at flood control storage structures, on depths at flood control storage structures, and on contents at flood control storage structures. Specifically it contains: (1) Discharge records at 43 stream gages and 33 flood control storage structures; (2) Depths of stored water at 35 flood control storage structures; and (3) Contents at 34 flood control storage structures where stage-storage relationships are available. Records included are only a small fraction of those obtained for each site during this water year. A number of streamflow gages collected by the FCDMC ALERT System are run cooperatively with the United States Geological Survey (USGS). Although real-time data for these sites are collected at the FCDMC for the purposes of flood event monitoring, quality control for the data at these gages lies with the USGS. The official records for these sites are published in the USGS Surface Water Data Reports each water year. The cooperative gages collected jointly for Water Year 1997 were: USGS Gage Name FCDMC ID USGS ID Gila River near Sacaton, AZ Gila River near Maricopa, AZ Salt River at Priest Drive Cave Cr. below Cottonwood Cr. Agua Fria River at El Mirage Skunk Creek near Phoenix, AZ New River near Glendale, AZ Gila River @ Estrella Parkway Hassayampa River nr Morristown Centennial Wash at SPRR 0783 0778 4523 4923 5503 5568 09478350 09479350 09512165 09512280 09513650 09513860 09513910 09514100 09516500 09517490 5508 6853 5223 5103 In addition to the continous cooperative stations, the FCDMC also cooperates with the USGS in the collection of peak discharges at a number of crest stage gage sites. The data for these crest stage gage sites are also published by the USGS in their Surface Water Data Reports each water year. iii The cooperative crest stage gage sites for Water Year 1997 were: Gage Site Name USGS ID Vekol Wash near Stanfield, AZ Tortilla Creek at Tortilla Flat Camp Creek near Sunflower Rock Creek near Sunflower Indian Bend Wash at Shea Blvd Agua Fria R. Trib. No. 2 Deadman Wash near New River Waterman Wash near Buckeye Hartman Wash near Wickenburg Ox Wash near Morristown Jackrabbit Wash near Tonapah Centennial Wash Trib. nr Wenden Tiger Wash near Aguila Rainbow Wash Trib. near Buckeye Bender Wash near Gila Bend Sauceda Wash near Gila Bend Military Wash near Sentinel Crater Range Wash near Ajo 09488650 09501300 09510170 09510180 09512090 09512700 09513820 09514200 09515800 09516600 09516800 09517200 09517280 09519600 09519750 09519760 09520100 09520230 This is the fourth 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. However, there are data resident in archives prior to water year 1994 that may have value to specific individuals. Data are available back to November 1987 for some streamflow sites. The data are collected as a depth of flow in feet (or stage). The discharge and/or contents is then obtained by applying the stage to a rating curve of stage versus discharge in cubic feet per second (cfs), or stage versus contents in acre-feet (ac-ft). The discharge rating curves have been developed at stream gages by using field surveyed cross sections in a HEC-2 or HECRAS step backwater computer model to obtain a range of stage versus discharge points to be plotted on a curve. These step backwater ratings are refined whenever possible using direct measurements made at or near the gage site. The discharge rating curves at flood control storage structures were developed by application of the Federal Highway Administration’s HY-8 computer model for culvert flow and U.S. Geological Survey methods for 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. The same is similarly true for storage facility contents. The minimum and maximum values are based on instantaneous readings and the volumes for discharge stations are based on accumulations of daily means. Those iv gages in section 2, Pool Levels at Storage Facilities, which show a continuous gage height during obvious periods of no storage, do so because the orifice to the pressure transducer is set at that gage height above or below 0.0' gage datum. All of the data in this report have been reviewed and edited in an attempt to provide the most accurate data possible. A blank or blanks within the data set is an indication that data was 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. WY1997: WY1994-95 means that the data for Water Years 1994-1995 were revised in the report for Water Year 1997). Comments about this report or errors discovered may be forwarded to the Flood Warning and Data Collection Branch using the comment/errata sheet found at the back of this document. Alternately, comments or errors may be sent via Internet e-mail from the FCDMC ALERT System Home Page or directly to twl@mail.maricopa.gov. An index of gage names, numbers, locations, and other descriptors is included following the Definition of Terms in this report. Additional or more detailed surface water data in hard copy or computer disk format is available for the gages listed in this report. Contact the Flood Control District, Engineering Division, Flood Warning and Data Collection Branch at (602) 506-1501. v DEFINITION OF TERMS Terms related to streamflow and other hydrologic data, as used in this report are defined below. Acre-foot (ac-ft) is 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. Contents is the volume of water in a reservoir or lake. Unless otherwise indicated, volume is computed on the basis of a level pool. Control designates a feature downstream from the gage that determines the stagedischarge relation at the gage. This feature may be a natural constriction of the channel, an artificial structure, or a uniform cross section over a long reach of the channel. Control structure as used in this report is a structure on a stream or canal that is used to regulate the flow or stage of the stream. Cubic foot per second (cfs) is the rate of discharge representing a volume of 1 cubic foot passing a given point during 1 second and is equivalent to approximately 7.48 gallons per second or 448.8 gallons per minute or 0.02832 cubic meters per second. Cubic foot per second-day is the volume of water represented by a flow of 1 cubic foot per second for 24 hours. It is equivalent to 86,400 cubic feet, approximately 1.9835 acrefeet, or about 646,000 gallons or 2,445 cubic meters. Daily mean discharge is the average discharge in cfs for a 24 hour period from midnight to midnight the following day. Discharge is the volume of water (or more broadly, total fluid plus suspended sediment), that passes a given point within a given period of time. Drainage area of a stream at a specified location is that 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. Drainage basin is a part of the surface of the Earth that is occupied by a drainage system, which consists of a surface stream or body of impounded surface water, together with all tributary surface streams and bodies of impounded surface water. Flood Elevation Frequency refers to the magnitude (in terms of depth or elevation) and probability of floods at a given flood control impoundment structure. The flood elevation frequency is usually given as a depth or elevatioin of impoundment associated with a given recurrence interval at a particular flood control impoundment structure. vi 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. Gage datum is 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 some given point such as a culvert invert elevation. Gage height is 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. Gaging station is a particular site on a stream, canal, lake, or reservoir where systematic observations of hydrologic data are obtained. Instantaneous discharge is the discharge at a particular instant of time. Maximum Level is the highest pool level recorded or observed at a particular gaging station at a flood control impoundment structure for a given event. Maximum Storage is the greatest volume of water stored behind or within a flood control impoundment structure for a given event. This occurs at the maximum pool level and is obtained from the stage-storage relation for that maximum level for a particular flood control impoundment structure. Mean discharge (MEAN) is the arithmetic mean of individual daily mean discharges during a specific period. National Geodetic Vertical Datum of 1929 (NGVD 1929) is 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. North American Vertical Datum of 1988 (NAVD 1988) is 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. vii Peak Discharge is the maximum instantaneous discharge for a given flood event. Period of Record 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 over the instrument. Recurrence interval is the reciprocal of the probability of a flood occurring in any given year. Thus, the flood having a 1% (1/100) 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) chance of occuring in any given year has a recurrence interval of 2 years and is referred to as the 2-year flood. Staff gage is a device located at the gaging station to provide a visual reference to the depth of water at a the gage in terms of gage height above the water level measuring instrument. Stage-discharge relation is the relation between gage height (stage) and the volume of water, per unit of time, flowing in a channel. Stage-storage relation is the relation between gage height (stage) and the volume of water stored behind or within a flood control impoundment structure. Streamflow 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. Water year 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 which includes 9 of the 12 months. Thus, the year ending September 30, 1997, is called the "1997 water year." viii ix Flood Control District of Maricopa County ALERT System Water Level Sensors WY 1997 ID # 778 783 788 793 798 4523 4563 4603 4613 4623 4638 4643 4648 4658 4668 4683 4748 4753 4803 4808 4813 4818 4823 4833 4903 4904 4918 4923 4938 5103 5113 Gage Name Gila @ Maricopa Rd Gila R. @ Olberg Santa Cruz @ SR 84 Greene Wash @ SR 84 Santa Rosa @ SR 84 Salt R. @ Priest Dr. Spookhill FRS IBW @ McKellips Rd. IBW @ Indian Bend Rd. IBW @ Interceptor Tatum Wash @ 40th St. IBW @ Sweetwater East Fork CC #1 East Fork CC #4 EFCC nr 7th Ave. East Fork CC #3 Old X-cut @ McDowell Old X-cut @ Thomas Dreamy Draw Dam ACDC @ 36th St. ACDC @ 14th St. 10th Street Wash Basin #1 ACDC @ 43rd Ave. Cave Creek @ Cactus Cave Buttes Outlet Cave Buttes Pool Cave Cr. nr Cave Cr. Cave Cr.@ Spur Cross Reata Pass Dam Centennial Railroad Saddleback FRS Sta. Type Rain/Stage Rain/Stage Rain/Stage Stage Rain/Stage Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Watershed Gila /Queen Ck Gila /Queen Ck Pinal Pinal Pinal C.Creek / Salt C.Creek / Salt C.Creek / Salt C.Creek / Salt C.Creek / Salt C.Creek / Salt C.Creek / Salt C.Creek / Salt C.Creek / Salt C.Creek / Salt C.Creek / Salt C.Creek / Salt C.Creek / Salt C.Creek / Salt C.Creek / Salt C.Creek / Salt C.Creek / Salt C.Creek / Salt C.Creek / Salt C.Creek / Salt C.Creek / Salt C.Creek / Salt C.Creek / Salt C.Creek / Salt Centennial Centennial Repeater Signal Peak Signal Peak Signal Peak Signal Peak Signal Peak Direct Thompson Pk Thompson Pk Thompson Pk Thompson Pk Thompson Pk Thompson Pk Direct Direct Direct Direct Direct Direct Direct Direct Direct Direct White Tanks Direct Direct Direct Thompson Pk White Tanks Mt. Ord White Tanks White Tanks Installed 4/9/95 4/12/95 3/16/94 3/23/94 3/16/94 12/7/93 3/13/84 5/21/85 9/28/83 4/21/94 6/3/94 12/27/90 3/2/94 1/18/94 5/21/97 9/13/94 7/27/94 7/26/94 1/24/84 2/24/94 2/9/94 11/26/96 11/14/90 6/27/91 1/25/84 1/25/84 5/27/94 6/16/93 2/25/93 2/9/90 12/16/88 x T-R-S 3S-3E-13 4S-6E-12 7S-5E-21 7S-4E-21 7S-4E-20 1N-4E-17 2N-7E-31 1N-4E-11 2N-4E-11 2N-4E-12 3N-4E-30 3N-3E-13 4N-3E-23 4N-3E-25 3N-3E-5 4N-3E-34 1N-4E-06 2N-5W-30 3N-3E-34 2N-3E-13 2N-3E-4 3N-3E-28 3N-2E-22 3N-2E-13 4N-3E-15 4N-3E-15 5N-3E-12 6N-4E-04 5N-5E-33 1S-6W-28 2N-10W-34 Latitude 33 10 16 33 06 50 32 52 55 32 52 48 32 52 39 33 26 00 33 28 01 33 26 58 33 32 00 33 31 57 33 34 16 33 36 15 33 40 05 33 38 31 33 37 43 33 38 44 33 27 55 33 29 17 33 33 45 33 30 09 33 32 31 33 34 47 33 35 03 33 35 56 33 42 58 33 42 58 33 47 30 33 53 05 33 44 06 33 18 35 33 27 55 Sorted by ID# Longitude Elev. Page #s 112 00 21 1120 1:1 111 41 15 1290 1:2 111 49 45 1311 1:3 111 56 03 1350 1:4 111 56 51 1305 1:5 111 57 43 1133 1:6 111 40 48 1595 1:7,2:1,3:1 111 54 58 1187 1:8 111 54 53 1071 1:9 111 53 55 1071 1:10 111 59 44 1300 1:11 112 00 18 1400 1:12 112 01 15 1515 1:13,2:2,3:2 112 01 01 1456 1:14,2:3,3:3 112 04 50 1325 1:15 112 02 24 1456 1:16,2:4,3:4 111 58 49 1250 1:17 111 54 52 1200 1:18 112 01 54 1407 1:19,2:5,3:5 112 00 00 1260 1:20 112 02 35 1230 1:21 112 03 16 1150 1:22,2:6,3:6 112 09 16 1225 1:23 112 07 01 1280 1:24 112 02 43 1649 1:25 112 02 43 1649 2:7,3:7 112 00 36 1800 1:26 111 57 17 2280 1:27 111 50 36 2600 2:8 112 52 56 850 1:28 113 04 21 1177 1:29,2:9,3:8 Flood Control District of Maricopa County ALERT System Water Level Sensors WY 1997 ID # 5128 5153 5203 5208 5223 5228 5233 5248 5283 5308 5353 5403 5408 5413 5418 5423 5438 5448 5503 5508 5523 5538 5539 5543 5568 5583 5598 5613 5614 5968 5973 5978 Gage Name Harquahala FRS Narrows Dam Buckeye FRS #1 Buckeye FRS #2 Hassy R. nr Morristown Hassy R. @ US 60 Sunset FRS Sunnycove FRS Hassy R. @ I-10 Hassy R. @ Box Canyon Hassy R. @ Wagoner Rd. Agua Fria @ Buckeye Colter @ El Mirage Dysart Drain @ LAFB White Tanks 3 Dysart Chnl @ El Mirage McMicken Floodway McMicken Dam Agua Fria @ Grand Ave. New River @ Glendale ACDC @ 67th Ave. Adobe Dam Outlet Adobe Dam Pool Scatter Wash Skunk Creek @ I-17 Skunk Cr. nr New R. New River @ Bell Rd. New River Outlet New River Pool Stoneridge Dam Sunridge Canyon Dam Golden Eagle Park Dam Sta. Type Rain/Stage Rain/Stage Rain/Stage Rain/Stage Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Stage Rain/Stage Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Stage Watershed Centennial Centennial Hassayampa Hassayampa Hassayampa Hassayampa Hassayampa Hassayampa Hassayampa Hassayampa Hassayampa Agua Fria Agua Fria Agua Fria Agua Fria Agua Fria Agua Fria Agua Fria Agua Fria Agua Fria Agua Fria Agua Fria Agua Fria Agua Fria Agua Fria Agua Fria Agua Fria Agua Fria Agua Fria Verde Verde Verde Repeater Installed T-R-S Burnt Mtn. 3/1/94 2N-8W-05 Harquahala Mtn. 9/1/94 4N-12W-04 White Tanks 7/26/83 1N-5W-3 White Tanks 11/11/92 1N-3W-07 White Tanks 5/7/96 6N-4W-03 White Tanks 3/14/94 7N-5W-12 Yarnell Hill 2/12/89 7N-5W-11 Yarnell Hill 7/31/86 7N-5W-11 Yarnell Hill 11/9/94 1N-5W-03 Towers Mtn. 11/17/83 8N-4W-7 Towers Mtn. 9/26/91 11N-3W-9 Direct 10/12/88 1N-1W-14 White Tanks 6/29/94 2N-1W-13 Direct 8/22/96 2N-1W-03 Direct 3/12/86 2N-2W-9 Direct 3/7/97 2N-1W-1 Direct 9/3/92 4N-1E-18 Direct 3/24/83 4N-2W-24 Direct 4/27/94 3N-1E-18 White Tanks 3/21/90 3N-1E-8 White Tanks 6/7/90 3N-1E-12 Thompson Pk 10/28/82 4N-2E-21 Thompson Pk 10/28/82 4N-2E-21 Thompson Pk 9/18/96 4N-2E-27 Direct 10/26/89 5N-2E-35 White Tanks 6/21/95 7N-3E-29 White Tanks 4/4/90 3N-1E-3 Direct 4/15/86 5N-1E-35 Direct 4/15/86 5N-1E-35 Thompson Pk 12/11/96 3N-6E-22 Mt. Ord 2/4/97 3N-6E-16 Thompson Pk 12/12/96 3N-6E-10 xi Latitude 33 32 54 33 43 29 33 29 24 33 26 26 33 53 06 33 58 22 33 57 50 33 57 25 33 27 33 33 58 11 34 18 38 33 26 05 33 30 38 33 32 38 33 32 01 33 32 38 33 41 04 33 40 38 33 36 25 33 32 14 33 37 26 33 40 37 33 40 37 33 40 20 33 43 47 33 55 36 33 38 18 33 44 09 33 44 09 33 35 41 33 16 18 33 37 07 Sorted by ID# Longitude Elev. Page #s 113 05 52 1420 1:30,2:10,3:9 113 30 45 1960 1:31 112 44 02 1097 1:32,2:11,3:10 112 35 47 1150 1:33,2:12,3:11 112 39 41 1830 1:34 112 43 40 2035 1:35 112 44 33 2100 1:36,2:13,3:12 112 44 24 2200 1:37,2:14,3:13 112 45 46 1035 1:38 112 43 38 2245 1:39-41 112 34 05 3785 1:42 112 19 55 940 1:43 112 19 32 1025 1:44 112 20 57 1090 1:45 112 28 14 1190 1:46,2:15,3:14 112 19 11 1023 1:47 112 24 33 1337 1:48 112 25 23 1361 1:49,2:16,3:15 112 18 16 1125 1:50 112 17 00 1050 1:51 112 12 10 1220 1:52 112 09 12 1413 1:53 112 09 12 1413 2:17,3:16 112 08 30 1340 1:54 112 07 21 1475 1:55 112 04 57 1854 1:56 112 14 27 1200 1:57 112 13 31 1498 1:58 112 13 31 1498 2:18,3:17 111 44 01 1710 1:59,2:19,3:18 111 45 06 1932 1:60,2:20,3:19 111 44 07 1722 1:61,2:21,3:20 Flood Control District of Maricopa County ALERT System Water Level Sensors WY 1997 ID # 5983 5988 5993 6503 6563 6573 6583 6598 6608 6623 6628 6673 6683 6688 6703 6713 6813 6823 6853 6893 6923 6983 7013 7043 7063 7083 7093 7113 7133 Gage Name North Heights Dam Aspen Dam Hesperus Dam Guadalupe FRS South Mountain Fan EMF @ Broadway EMF @ Queen Creek Rd. EMF @ Arizona Ave. Freestone Park Basin Crossroads Park Basin Signal Butte FRS Apache Junction FRS Powerline FRS Vineyard FRS Rittenhouse FRS Queen Ck @ Rittenhouse Buckeye FRS #3 White Tanks 4 Gila @ Estrella Pkwy. Estrella Fan Sauceda Wash Vekol Wash Martinez Creek Sols Wash nr Matthie Hartman Wash Flying E Wash Casandro Wash Powder House Wash Casandro Dam Sta. Type Rain/Stage Stage Rain/Stage Rain/Stage Weather Rain/Stage Rain/Stage Rain/Stage Rain/Stage Weather Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Stage Weather Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Watershed Verde Verde Verde Gila /Queen Ck Gila /Queen Ck Gila /Queen Ck Gila /Queen Ck Gila /Queen Ck Gila/Queen Ck Gila/Queen Ck Gila /Queen Ck Gila /Queen Ck Gila /Queen Ck Gila /Queen Ck Gila /Queen Ck Gila /Queen Ck Wtrmn/Sauceda Wtrmn/Sauceda Wtrmn/Sauceda Wtrmn/Sauceda Wtrmn/Sauceda Wtrmn/Sauceda Hassayampa Hassayampa Hassayampa Hassayampa Hassayampa Hassayampa Hassayampa Repeater Thompson Pk Thompson Pk Thompson Pk Direct White Tanks Thompson Pk Thompson Pk Kings Ranch Thompson Pk Thompson Pk Kings Ranch Kings Ranch Kings Ranch Thompson Pk Thompson Pk Kings Ranch White Tanks White Tanks White Tanks Waterman White Tanks White Tanks Yarnell Hill Yarnell Hill Yarnell Hill Yarnell Hill Yarnell Hill Yarnell Hill Yarnell Hill Installed 10/11/96 1/2/97 12/18/96 6/29/89 6/9/93 8/10/89 1/18/89 2/10/89 12/19/95 12/18/95 11/10/87 12/16/81 12/3/92 11/2/83 9/27/88 9/14/93 11/23/92 1/9/86 12/2/92 4/30/93 2/28/90 3/7/90 11/23/94 8/4/95 7/6/94 7/12/94 7/12/94 5/18/95 8/15/96 xii T-R-S 3N-6E-9 3N-6E-4 3N-6E-4 1S-4E-5 1S-2E-26 1N-6E-26 2S-6E-15 3S-5E-15 1S-6E-8 1S-6E-21 1N-7E-12 1N-8E-8 1S-8E-9 1S-8E-9 2S-8E-2 2S-7E-25 1N-3W-10 1N-2W-5 1N-1W-31 2S-1W-12 6S-5W-4 7S-1E-3 8N-5W-17 8N-5W-32 7N-5W-12 7N-5W-09 7N-5W-10 7N-4W-06 7N-5W-11 Latitude 33 37 21 33 37 34 33 38 14 33 22 16 33 18 57 33 24 21 33 15 50 33 10 53 33 21 29 33 19 40 33 26 25 33 26 28 33 21 06 33 21 06 33 17 22 33 13 50 33 26 49 33 27 04 33 23 19 33 16 08 32 52 27 32 50 30 34 01 44 33 59 14 33 57 47 33 57 44 33 57 44 33 59 00 33 58 04 Sorted by ID# Longitude Elev. Page #s 111 44 54 1819 1:62,2:22,3:21 111 44 48 1840 1:63,2:23,3:22 111 44 47 1894 1:64,2:24,3:23 111 58 10 1250 1:65,2:25,3:24 112 08 05 1420 1:66 111 42 42 1349 1:67 111 43 35 1317 1:68 111 51 50 1214 1:69 111 46 21 1450 2:26,3:25 111 44 49 1270 2:27,3:26 111 35 25 1650 1:70,2:28,3:27 111 33 07 1989 1:71,2:29,3:28 111 32 34 1580 1:72,2:30,3:29 111 32 34 1582 1:73,2:31,3:30 111 30 26 1580 1:74,2:32,3:31 111 35 41 1400 1:75 112 33 20 1200 1:76,2:33,3:32 112 29 40 1044 1:77,2:34,3:33 112 23 33 900 1:78 112 19 15 1425 1:79 112 44 57 726 1:80 112 14 58 1720 1:81 112 47 30 2300 1:82 112 47 36 2220 1:83 112 49 40 2488 1:84 112 46 49 2302 1:85 112 45 53 2240 1:86 112 42 45 2120 1:87 112 44 49 2163 1:88,2:35,3:34 Flood Control District of Maricopa County ALERT System Water Level Sensors WY 1997 ID # 4813 4808 4823 5523 5538 5539 5403 5503 6673 5988 5203 5208 6813 7133 7093 4903 4904 4918 4923 4833 5103 5408 6623 5423 4803 5413 4648 4683 4658 4668 6598 Gage Name ACDC @ 14th St. ACDC @ 36th St. ACDC @ 43rd Ave. ACDC @ 67th Ave. Adobe Dam Outlet Adobe Dam Pool Agua Fria @ Buckeye Agua Fria @ Grand Ave. Apache Junction FRS Aspen Dam Buckeye FRS #1 Buckeye FRS #2 Buckeye FRS #3 Casandro Dam Casandro Wash Cave Buttes Outlet Cave Buttes Pool Cave Cr. nr Cave Cr. Cave Cr.@ Spur Cross Cave Creek @ Cactus Centennial Railroad Colter @ El Mirage Crossroads Park Basin Dysart Chnl @ El Mirage Dreamy Draw Dam Dysart Drain @ LAFB East Fork CC #1 East Fork CC #3 East Fork CC #4 EFCC near 7th Ave. EMF @ Arizona Ave. Sta. Type Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Weather Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Watershed C.Creek / Salt C.Creek / Salt C.Creek / Salt Agua Fria Agua Fria Agua Fria Agua Fria Agua Fria Gila /Queen Ck Verde Hassayampa Hassayampa Wtrmn/Sauceda Hassayampa Hassayampa C.Creek / Salt C.Creek / Salt C.Creek / Salt C.Creek / Salt C.Creek / Salt Centennial Agua Fria Gila/Queen Ck Agua Fria C.Creek / Salt Agua Fria C.Creek / Salt C.Creek / Salt C.Creek / Salt C.Creek / Salt Gila /Queen Ck Repeater Direct Direct White Tanks White Tanks Thompson Pk Thompson Pk Direct Direct Kings Ranch Thompson Pk White Tanks White Tanks White Tanks Yarnell Hill Yarnell Hill Direct Direct Thompson Pk White Tanks Direct White Tanks White Tanks Thompson Pk Direct Direct Direct Direct Direct Direct Direct Kings Ranch Installed 2/9/94 2/24/94 11/14/90 6/7/90 10/28/82 10/28/82 10/12/88 4/27/94 12/16/81 1/2/97 7/26/83 11/11/92 11/23/92 8/15/96 7/12/94 1/25/84 1/25/84 5/27/94 6/16/93 6/27/91 2/9/90 6/29/94 12/18/95 3/7/97 1/24/84 8/22/96 3/2/94 9/13/94 1/18/94 5/21/97 2/10/89 xiii T-R-S 2N-3E-4 2N-3E-13 3N-2E-22 3N-1E-12 4N-2E-21 4N-2E-21 1N-1W-14 3N-1E-18 1N-8E-8 3N-6E-4 1N-5W-3 1N-3W-07 1N-3W-10 7N-5W-11 7N-5W-10 4N-3E-15 4N-3E-15 5N-3E-12 6N-4E-04 3N-2E-13 1S-6W-28 2N-1W-13 1S-6E-21 2N-1W-1 3N-3E-34 2N-1W-03 4N-3E-23 4N-3E-34 4N-3E-25 3N-3E-5 3S-5E-15 Latitude 33 32 31 33 30 09 33 35 03 33 37 26 33 40 37 33 40 37 33 26 05 33 36 25 33 26 28 33 37 34 33 29 24 33 26 26 33 26 49 33 58 04 33 57 44 33 42 58 33 42 58 33 47 30 33 53 05 33 35 56 33 18 35 33 30 38 33 19 40 33 32 38 33 33 45 33 32 38 33 40 05 33 38 44 33 38 31 33 37 43 33 10 53 Sorted by Name Longitude Elev. Page #s 112 02 35 1230 1:21 112 00 00 1260 1:20 112 09 16 1225 1:23 112 12 10 1220 1:52 112 09 12 1413 1:53 112 09 12 1413 2:17,3:16 112 19 55 940 1:43 112 18 16 1125 1:50 111 33 07 1989 1:71,2:29,3:28 111 44 48 1840 1:63,2:23,3:22 112 44 02 1097 1:32,2:11,3:10 112 35 47 1150 1:33,2:12,3:11 112 33 20 1200 1:76,2:33,3:32 112 44 49 2163 1:88,2:35,3:34 112 45 53 2240 1:86 112 02 43 1649 1:25 112 02 43 1649 2:7,3:7 112 00 36 1800 1:26 111 57 17 2280 1:27 112 07 01 1280 1:24 112 52 56 850 1:28 112 19 32 1025 1:44 111 44 49 1270 2:27,3:26 112 19 11 1023 1:47 112 01 54 1407 1:19,2:5,3:5 112 20 57 1090 1:45 112 01 15 1515 1:13,2:2,3:2 112 02 24 1456 1:16,2:4,3:4 112 01 01 1456 1:14,2:3,3:3 112 04 50 1325 1:15 111 51 50 1214 1:69 Flood Control District of Maricopa County ALERT System Water Level Sensors WY 1997 ID # 6573 6583 6893 7083 6608 6853 778 783 5978 793 6503 5128 7063 5308 5283 5228 5353 5223 5993 4613 4623 4603 4643 7013 5448 5438 5153 5598 5508 5613 5614 5983 Gage Name EMF @ Broadway EMF @ Queen Creek Rd. Estrella Fan Flying E Wash Freestone Park Basin Gila @ Estrella Pkwy. Gila @ Maricopa Rd Gila R. @ Olberg Golden Eagle Park Dam Greene Wash @ SR 84 Guadalupe FRS Harquahala FRS Hartman Wash Hassy R. @ Box Canyon Hassy R. @ I-10 Hassy R. @ US 60 Hassy R. @ Wagoner Rd. Hassy R. nr Morristown Hesperus Dam IBW @ Indian Bend Rd. IBW @ Interceptor IBW @ McKellips Rd. IBW @ Sweetwater Martinez Creek McMicken Dam McMicken Floodway Narrows Dam New River @ Bell Rd. New River @ Glendale New River Outlet New River Pool North Heights Dam Sta. Type Rain/Stage Rain/Stage Weather Rain/Stage Rain/Stage Stage Rain/Stage Rain/Stage Stage Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Watershed Gila /Queen Ck Gila /Queen Ck Wtrmn/Sauceda Hassayampa Gila/Queen Ck Wtrmn/Sauceda Gila /Queen Ck Gila /Queen Ck Verde Pinal Gila /Queen Ck Centennial Hassayampa Hassayampa Hassayampa Hassayampa Hassayampa Hassayampa Verde C.Creek / Salt C.Creek / Salt C.Creek / Salt C.Creek / Salt Hassayampa Agua Fria Agua Fria Centennial Agua Fria Agua Fria Agua Fria Agua Fria Verde Repeater Installed T-R-S Thompson Pk 8/10/89 1N-6E-26 Thompson Pk 1/18/89 2S-6E-15 Waterman 4/30/93 2S-1W-12 Yarnell Hill 7/12/94 7N-5W-09 Thompson Pk 12/19/95 1S-6E-08 White Tanks 12/2/92 1N-1W-31 Signal Peak 4/9/95 3S-3E-13 Signal Peak 4/12/95 4S-6E-12 Thompson Pk 12/12/96 3N-6E-10 Signal Peak 3/23/94 7S-4E-21 Direct 6/29/89 1S-4E-5 Burnt Mtn. 3/1/94 2N-8W-05 Yarnell Hill 7/6/94 7N-5W-12 Towers Mtn. 11/17/83 8N-4W-7 Yarnell Hill 11/9/94 1N-5W-03 White Tanks 3/14/94 7N-5W-12 Towers Mtn. 9/26/91 11N-3W-9 White Tanks 5/7/96 6N-4W-03 Thompson Pk 12/18/96 3N-6E-4 Thompson Pk 9/28/83 2N-4E-11 Thompson Pk 4/21/94 2N-4E-12 Thompson Pk 5/21/85 1N-4E-11 Thompson Pk 12/27/90 3N-3E-13 Yarnell Hill 11/23/94 8N-5W-17 Direct 3/24/83 4N-2W-24 Direct 9/3/92 4N-1E-18 Harquahala Mtn. 9/1/94 4N-12W-04 White Tanks 4/4/90 3N-1E-3 White Tanks 3/21/90 3N-1E-8 Direct 4/15/86 5N-1E-35 Direct 4/15/86 5N-1E-35 Thompson Pk 10/11/96 3N-6E-09 xiv Latitude 33 24 21 33 15 50 33 16 08 33 57 44 33 21 29 33 23 19 33 10 16 33 06 50 33 37 07 32 52 48 33 22 16 33 32 54 33 57 47 33 58 11 33 27 33 33 58 22 34 18 38 33 53 06 33 38 14 33 32 00 33 31 57 33 26 58 33 36 15 34 01 44 33 40 38 33 41 04 33 43 29 33 38 18 33 32 14 33 44 09 33 44 09 33 37 21 Sorted by Name Longitude Elev. Page #s 111 42 42 1349 1:67 111 43 35 1317 1:68 112 19 15 1425 1:79 112 46 49 2302 1:85 111 46 21 1450 2:26,3:25 112 23 33 900 1:78 112 00 21 1120 1:1 111 41 15 1290 1:2 111 44 07 1722 1:61,2:21,3:20 111 56 03 1350 1:4 111 58 10 1250 1:65,2:25,3:24 113 05 52 1420 1:30,2:10,3:9 112 49 40 2488 1:84 112 43 38 2245 1:39-41 112 45 46 1035 1:38 112 43 40 2035 1:35 112 34 05 3785 1:42 112 39 41 1830 1:34 111 44 47 1894 1:64,2:24,3:23 111 54 53 1071 1:9 111 53 55 1071 1:10 111 54 58 1187 1:8 112 00 18 1400 1:12 112 47 30 2300 1:82 112 25 23 1361 1:49,2:16,3:15 112 24 33 1337 1:48 113 30 45 1960 1:31 112 14 27 1200 1:57 112 17 00 1050 1:51 112 13 31 1498 1:58 112 13 31 1498 2:18,3:17 111 44 54 1819 1:62,2:22,3:21 Flood Control District of Maricopa County ALERT System Water Level Sensors WY 1997 ID # 4748 4753 7113 6683 6713 4938 6703 5113 4523 788 798 6923 5543 6628 5583 5568 7043 6563 4563 5968 5248 5973 5233 4638 4818 6983 6688 5418 6823 Gage Name Old X-cut @ McDowell Old X-cut @ Thomas Powder House Wash Powerline FRS Queen Ck @ Rittenhouse Reata Pass Dam Rittenhouse FRS Saddleback FRS Salt R. @ Priest Dr. Santa Cruz @ SR 84 Santa Rosa @ SR 84 Sauceda Wash Scatter Wash Signal Butte FRS Skunk Cr. nr New R. Skunk Creek @ I-17 Sols Wash nr Matthie South Mountain Fan Spookhill FRS Stoneridge Dam Sunnycove FRS Sunridge Canyon Dam Sunset FRS Tatum Wash @ 40th St. 10th Street Wash Basin #1 Vekol Wash Vineyard FRS White Tanks 3 White Tanks 4 Sta. Type Rain/Stage Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Stage Rain/Stage Rain/Stage Rain/Stage Stage Rain/Stage Stage Rain/Stage Rain/Stage Weather Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Rain/Stage Watershed C.Creek / Salt C.Creek / Salt Hassayampa Gila /Queen Ck Gila /Queen Ck C.Creek / Salt Gila /Queen Ck Centennial C.Creek / Salt Pinal Pinal Wtrmn/Sauceda Agua Fria Gila /Queen Ck Agua Fria Agua Fria Hassayampa Gila /Queen Ck C.Creek / Salt Verde Hassayampa Verde Hassayampa C.Creek / Salt C.Creek / Salt Wtrmn/Sauceda Gila /Queen Ck Agua Fria Wtrmn/Sauceda Repeater Direct Direct Yarnell Hill Kings Ranch Kings Ranch Mt. Ord Thompson Pk White Tanks Direct Signal Peak Signal Peak White Tanks Thompson Pk Kings Ranch White Tanks Direct Yarnell Hill White Tanks Thompson Pk Thompson Pk Yarnell Hill Mt. Ord Yarnell Hill Thompson Pk Direct White Tanks Thompson Pk Direct White Tanks Installed 7/27/94 7/26/94 5/18/95 12/3/92 9/14/93 2/25/93 9/27/88 12/16/88 12/7/93 3/16/94 3/16/94 2/28/90 9/18/96 11/10/87 6/21/95 10/26/89 8/4/95 6/9/93 3/13/84 12/11/96 7/31/86 2/4/97 2/12/89 6/3/94 11/26/96 3/7/90 11/2/83 3/12/86 1/9/86 xv T-R-S 1N-4E-06 2N-5W-30 7N-4W-06 1S 8E 09 2S-7E-25 5N-5E-33 2S-8E-2 2N-10W-34 1N-4E-17 7S-5E-21 7S-4E-20 6S-5W-04 4N-2E-27 1N-7E-12 7N-3E-29 5N-2E-35 8N-5W-32 1S-2E-26 2N-7E-31 3N-6E-22 7N-5W-11 3N-6E-16 7N-5W-11 3N-4E-30 3N-3E-28 7S-1E-3 1S-8E-9 2N-2W-9 1N-2W-5 Latitude 33 27 55 33 29 17 33 59 00 33 21 06 33 13 50 33 44 06 33 17 22 33 27 55 33 26 00 32 52 55 32 52 39 32 52 27 33 40 20 33 26 25 33 55 36 33 43 47 33 59 14 33 18 57 33 28 01 33 35 41 33 57 25 33 16 18 33 57 50 33 34 16 33 34 47 32 50 30 33 21 06 33 32 01 33 27 04 Sorted by Name Longitude Elev. Page #s 111 58 49 1250 1:17 111 54 52 1200 1:18 112 42 45 2120 1:87 111 32 34 1580 1:72,2:30,3:29 111 35 41 1400 1:75 111 50 36 2600 2:8 111 30 26 1580 1:74,2:32,3:31 113 04 21 1177 1:29,2:9,3:8 111 57 43 1133 1:6 111 49 45 1311 1:3 111 56 51 1305 1:5 112 44 57 726 1:80 112 08 30 1340 1:54 111 35 25 1650 1:70,2:28,3:27 112 04 57 1854 1:56 112 07 21 1475 1:55 112 47 36 2220 1:83 112 08 05 1420 1:66 111 40 48 1595 1:7,2:1,3:1 111 44 01 1710 1:59,2:19,3:18 112 44 24 2200 1:37,2:14,3:13 111 45 06 1932 1:60,2:20,3:19 112 44 33 2100 1:36,2:13,3:12 111 59 44 1300 1:11 112 03 16 1150 1:22,2:6,3:6 112 14 58 1720 1:81 111 32 34 1582 1:73,2:31,3:30 112 28 14 1190 1:46,2:15,3:14 112 29 40 1044 1:77,2:34,3:33 SUMMARY OF SIGNIFICANT STREAMFLOW EVENTS Water Year 1997 though drier than average over much of Maricopa County did see a few significant runoff events. The winter season saw two runoff producing events. The first occurred on January 13th-14th and the second on February 28th. The January 13th-14th event resulted in the maximum flow for the year on the Indian Bend Wash gages. Near Indian Bend Road 350 cfs was recorded while near McKellips Road 55 cfs were recorded. Cave Creek near Cave Creek also recorded the annual maximum runoff of 280 cfs during this event which was matched during the runoff event of February 28th. The summer runoff season saw considerably more runoff activity than the winter season. The west and especially the northwest portions of Maricopa County experienced most of the big runoff events. The largest and most significant runoff producing event occurred almost at water year’s end on September 25th and 26th when the remnants of Hurricane Nora crossed western Maricopa County. Many of the washes in these areas experienced flows around the 10-year recurrance interval. Centennial Wash had a peak discharge of 8,100 cfs near Salome, Arizona which overtopped the Narrow Dam emergency spillways and eventually caused the dam to breach in two locations. In and around Wickenburg, Arizona, Hartman Wash saw 1,250 cfs, Flying E Wash 1,145 cfs, Casandro Wash 180 cfs, Sols Wash near Matthie 8,000 cfs, Martinez Creek 10,300 cfs, and the Hassayampa River at US 60 peaked at 15,400 cfs. The three dams in Wickenburg also experienced relatively large impoundments. Casandro Dam filled to 45% of its spillway capacity while Sunset Dam filled to almost 40% and Sunnycove Dam to 14%. September 11th was the big runoff producing event in the metropolitan area when the ACDC and Tatum Wash experienced their annual maximum runoff events of 940 cfs and 90 cfs respectively. The USGS also recorded several significant events in August and September at several of the cooperative continuous and crest stage gage stations including, Centennial Wash near Arlington, Hassayampa River near Morristown and near Arlington, Tiger Wash, and Jackrabbit Wash. These events will be reported by the USGS in their Water Data Report for Water Year 1997. The significant flows and/or impoundments recorded by the FCDMC for Water Year 1997 are summarized in the following table. The hydrographs for a number of stations for the Hurricane Nora flood event are shown on the page following the summary table. Summary Page xvi FCDMC Annual Surface Water Report Water Year 1997 Maximum Flows and Impoundments for Water Year 1997 at Selected FCDMC Water Level Sensor Locations Location ACDC @ 14th Street ACDC @ 43rd Ave ACDC @ 67th Ave Buckeye FRS #1 Casandro Dam Casandro Wash Cave Creek near Cave Creek Flying E Wash Greene Wash Harquahala FRS Hartman Wash Hassayampa River @ I-10 Hassayampa River at Box Canyon Hassayampa River at US 60 Hassayampa River at Wagoner Road Indian Bend Wash near Indian Bend Road Indian Bend Wash near McKellips Road Martinez Creek Narrows Dam Powder House Wash Saddleback FRS Sauceda Wash Signal Butte FRS Skunk Creek near New River Road Sols Wash near Matthie Sunnycove FRS Sunset FRS Tatum Wash at 40th Street Centennial Wash near Salome, AZ * Discharge (cfs) 60 890 940 95 19 180* 280 1,145 480 290 1250 7,440* 3,550 15,400 215 350 130 10,300 2,610* 390* 65 700 0 110 8,000 44 43 90 Stage (feet) Contents (ac-ft) Date (%full) 1.3 11.3 48* 65 0.6 45 18.4 151* 1.7 20.7 Unknown > 100 1.5 86 1.3 5.6 39 2.3 17.2 12.3 30 34 13.9 39.5 Miscellaneous Flows Recorded by FCDMC during Water Year 1997 8,100 Based on Slope-Conveyance Survey 9/11/97 9/11/97 9/11/97 8/8/97 9/26/97 9/26/97 1/14/97 & 2/28/97 9/26/97 9/6/97 8/8/97 9/26/97 9/26/97 9/26/97 9/26/97 9/26/97 1/13/97 8/26/97 9/26/97 9/26/97 9/26/97 8/8/97 9/6/97 8/10/97 9/11/97 9/26/97 9/26/97 9/26/97 9/11/97 9/26/97 Refer to individual station pages for notes on these sites. Summary Page xvii FCDMC Annual Surface Water Report Water Year 1997 Flood of September 26, 1997 15 Minute Maximum Discharges 16000 Hassayampa River @ Box Canyon 15000 Martinez Creek 14000 Sols Wash near Matthie 13000 Hartman Wash 12000 Flying E Wash Powder House Wash 11000 Hassayampa River @ US60 Discharge (cfs) 10000 9000 8000 7000 6000 5000 4000 3000 2000 1000 0 3:00 Summary Page xviii 4:00 5:00 6:00 7:00 8:00 9:00 10:00 11:00 Time on Sept. 26, 1997 12:00 13:00 14:00 15:00 16:00 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 778 Name: Gila @ Maricopa Rd USGS Gage: Gila River near Maricopa, AZ, ID# 09479350 Drainage Area: 19,915 mi 2 See USGS Water-Data Report AZ-97-1 for data for this site. Surface Water Streamflow Data Page 1 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 783 Name: Gila R. @ Olberg USGS Gage: Gila River near Sacaton, AZ, ID# 09478350 Drainage Area: 18,674 mi 2 See USGS Water-Data Report AZ-97-1 for data for this site. Surface Water Streamflow Data Page 2 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 788 Name: Santa Cruz @ SR 84 Period of Record: 03/16/94 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Dec. 3 Mar. 3 Sept. 3 Sept. 28 Peak flows of interest during Water Year 1997: Peak Discharge (cfs) Day Peak Discharge (cfs) 40 57 73 42 Jan. 4 Aug. 8 Sept. 6 78 40 56 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 12 1 2 4 40 3 14 2 25 64 4 42 1 1 67 5 20 6 1 21 7 6 5 8 2 9 2 24 10 1 11 12 6 5 13 14 15 16 2 17 9 18 8 19 14 20 10 21 13 22 23 2 24 25 4 26 3 27 1 2 28 2 25 29 2 30 31 -----------------------------------------------------------------------------TOTAL 0 0 51 60 0 33 1 3 0 6 53 255 MEAN 0 0 2 2 0 1 0 0 0 0 2 8 MAX 0 0 40 78 0 57 6 21 0 12 40 73 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 102 120 0 65 2 7 0 13 104 505 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 463 MEAN 1 MAX 78 MIN 0 AC_FT 918 Surface Water Streamflow Data Page 3 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Note: Many flows due to irrigation return water. Surface Water Streamflow Data Page 4 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 793 Name: Greene Wash @ SR 84 Period of Record: 03/23/94 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Sept. 6 Peak flows of interest during Water Year 1997: Minimum flow recorded by gage is about 40 cfs at 0.1 ft gage height. Peak Discharge (cfs) 482 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 101 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 0 101 MEAN 0 0 0 0 0 0 0 0 0 0 0 3 MAX 0 0 0 0 0 0 0 0 0 0 0 482 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 0 199 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 101 MEAN 0 MAX 482 MIN 0 AC_FT 199 Surface Water Streamflow Data Page 5 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 798 Name: Santa Rosa @ SR 84 Period of Record: 03/16/94 to current year Discharge, in cfs, Water Year October 1996 to September 1997 No flow above gage during Water Year 1997. Minimum flow recorded by gage is about 325 cfs at -0.14 ft gage height. Day Peak Discharge (cfs) Sept. 5 or 6 45* OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 45* 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 1997 TOTAL 0 MEAN 0 MAX 45* MIN 0 AC_FT 0 * Estimated from high water marks below instrument at –1.42 ft gage height. Therefore, no volume (ac-ft) or mean flow data available. Surface Water Streamflow Data Page 6 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 4523 Name: Salt R. @ Priest Dr. USGS Gage: Salt River at Priest Drive, ID# 09512165 Drainage Area: 13,223 mi 2 See USGS Water-Data Report AZ-97-1 for data for this site. Flood Flow Frequency (source: Table 2-4 from Study for Modified Roosevelt Dam) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 5-year 10-year 20-year 50-year 100-year 20,500 55,000 90,000 140,000 169,000 Surface Water Streamflow Data Page 7 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 4563 Name: Spookhill FRS Drainage Area: 13.6 mi 2 Period of Record: Nov. 1987 to current year Discharge, in cfs, Water Year October 1996 to September 1997 No outflow during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 8 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 4603 Name: IBW @ McKellips Rd. Drainage Area: 101 mi 2 Period of Record: Nov. 1987 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Peak flows of interest during Water Year 1997: Peak Discharge (cfs) Day Peak Discharge (cfs) Day Jan. 14 Aug. 26 55 128 Feb. 27 38 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 12 2 2 3 1 4 1 5 6 7 8 2 9 3 10 1 11 1 12 1 13 15 14 22 15 16 17 18 19 20 21 22 23 24 25 26 44 27 5 11 28 15 1 29 30 31 1 -----------------------------------------------------------------------------TOTAL 1 0 0 37 20 14 0 0 0 1 61 1 MEAN 0 0 0 1 1 0 0 0 0 0 2 0 MAX 1 3 0 55 38 18 1 0 0 16 128 9 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 2 1 0 74 40 28 0 0 0 1 121 3 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 137 MEAN 0 MAX 128 MIN 0 AC_FT 271 Surface Water Streamflow Data Page 9 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow See also the USGS Water-Data Report for Indian Bend Wash @ Curry Road, USGS gage ID# 09512162, located approximately 1/2 mile downstream. Flood Flow Frequency (FEMA 9/95) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 10-year 50-year 100-year 4,000 14,000 20,000 Surface Water Streamflow Data Page 10 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 4613 Name: IBW @ Indian Bend Drainage Area: approximately 88 mi 2 Period of Record: USGS -- 1961-1984; FCDMC -- Nov. 1987 to current water year Discharge, in cfs, Water Year October 1996 to September 1997 Day Jan. 13 Peak flows of interest during Water Year 1997: Peak Discharge (cfs) Day Peak Discharge (cfs) 346 Feb. 28 243 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 59 14 16 15 16 17 18 19 20 21 22 23 24 25 26 27 2 28 60 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 0 74 62 7 0 0 0 0 0 0 MEAN 0 0 0 2 2 0 0 0 0 0 0 0 MAX 0 0 0 346 243 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 148 123 15 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 144 MEAN 0 MAX 346 MIN 0 AC_FT 285 Flood Flow Frequency (FEMA 9/95) Magnitude and Probability of Instantaneous Peak Flow Surface Water Streamflow Data Page 11 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow 10-year 3,500 Discharge, in cfs, for Indicated Recurrence Interval 50-year 100-year 12,000 17,000 Station Number: 4623 Name: IBW Interceptor Drainage Area: 35 mi2 Period of Record: 04/21/94 to current year Discharge, in cfs, Water Year October 1996 to September 1997 No flow during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 Flood Flow Frequency (HEC-1 for IBW FDS 1997) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 100-year 8,000 Surface Water Streamflow Data Page 12 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 4638 Name: Tatum Wash @ 40th Drainage Area: 1.82 mi 2 Period of Record: 06/03/94 to current year Revised Records: WY1996: WY1995 Discharge, in cfs, Water Year October 1996 to September 1997 Day Nov. 22 Peak flows of interest during Water Year 1997: Day Peak Discharge (cfs) Peak Discharge (cfs) 22 Sept. 11 89 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 4 13 14 15 16 17 18 19 20 21 22 9 23 7 24 25 26 27 28 29 30 31 -----------------------------------------------------------------------------TOTAL 0 15 0 0 0 0 0 0 0 0 0 7 MEAN 0 1 0 0 0 0 0 0 0 0 0 0 MAX 0 22 0 0 0 0 0 0 0 0 0 89 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 31 0 0 0 0 0 0 0 0 0 14 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 22 MEAN 0 MAX 89 MIN 0 AC_FT 44 Flood Flow Frequency (HEC-1 for Tatum Wash Detention Basin Analysis, 1995) Surface Water Streamflow Data Page 13 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 100-year 2,200 Surface Water Streamflow Data Page 14 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 4643 Name: IBW @ Sweetwater Drainage Area: 9.2 mi 2 Period of Record: 12/27/90 to current year* Discharge, in cfs, Water Year October 1996 to September 1997 Day Jan. 13 Peak flows of interest during Water Year 1997: Peak Discharge (cfs) 50 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------TOTAL 0 0 0 4 0 0 0 ----------MEAN 0 0 0 0 0 0 0 ----------MAX 0 0 0 50 0 0 0 ----------MIN 0 0 0 0 0 0 0 ----------AC_FT 0 0 0 8 0 0 0 ---------------------------------------------------------------------------------------WTR YR 1997 TOTAL 4 MEAN 0 MAX 50 MIN 0 AC_FT 8 Note: Gage removed due to bridge and roadway construction on 04/25/1997. Site to be reinstalled as soon as construction allows. Flood Flow Frequency (FEMA 9/95) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 10-year 50-year 100-year 2,000 3,500 6,000 Surface Water Streamflow Data Page 15 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 4648 Name: E.Fork CC #1 Drainage Area: 1.18 mi 2 Period of Record: 03/02/94 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Aug. 3 No outflows during Water Year 1997 except on following days: Day Peak Discharge (cfs) Peak Discharge (cfs) 2 Sept. 11 7 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 2 7 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 1 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 0 MEAN 0 MAX 7 MIN 0 AC_FT 1 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 16 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 4658 Name: E.Fork CC #4 Drainage Area: 0.68 mi 2 Period of Record: 01/18/94 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Jan. 13 Aug. 3 Peak outflows greater than 10 cfs during Water Year 1997: Day Peak Discharge (cfs) Peak Discharge (cfs) 17 12 Feb. 27 Sept. 11 19 37 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------TOTAL 1 0 0 9 7 1 3 0 0 0 10 4 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 7 0 0 17 19 0 7 0 0 0 12 37 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 2 0 0 19 14 2 6 0 0 0 19 9 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 36 MEAN 0 MAX 37 MIN 0 AC_FT 71 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 17 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 4668 Name: EFCC nr 7thAve Drainage Area: 14.1 mi 2 Period of Record: 05/21/97 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Maximum flow during Water Year 1997: Peak Discharge (cfs) Day Sept. 11 133* OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 0 133* 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 1997 TOTAL 0 MEAN 0 MAX 133* MIN 0 AC_FT 0 * Maximum from high water marks on crest stage gage. Gage discovered not functioning on 12/08/97. Assumed not functioning properly since installation. Therefore, many other days of flow less than 9/11/97 maximum may have been missed. Also, therefore no mean daily flows or volumes reported for Water Year 1997. Flood Flow Frequency (FEMA 9/95) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 10-year 50-year 100-year 2,300 6,300 8,900 Surface Water Streamflow Data Page 18 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 4683 Name: E.Fork CC #3 Drainage Area: 3.52 mi 2 (1.86 mi 2 controlled by EFCC #1 and EFCC #4) Period of Record: 07/27/94 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Peak outflows greater than 10 cfs during Water Year 1997: Peak Discharge (cfs) Day Sept. 11 14* OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 14* 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 1 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 0 MEAN 0 MAX 14* MIN 0 AC_FT 1 * Flows up to about the 2-year are passed beneath the detention basin via storm drains. Also, the 9/11/97 event appears to have been caused by local flow from the area immediate to the gage. See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 19 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 4748 Name: Old Xcut @ McDowell Period of Record: 07/27/94 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Jan. 13 Aug. 3 Aug. 26 Peak flows of interest during Water Year 1997: Peak Discharge (cfs) Day Peak Discharge (cfs) 57 68 78 July 31 Aug. 8 Sept. 11 66 63 89 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 27 2 29 14 3 30 5 13 4 30 5 5 30 1 6 17 7 12 8 8 9 5 10 11 14 12 18 13 8 14 15 16 17 18 19 20 21 22 23 24 25 26 15 27 8 28 10 13 29 10 30 26 31 4 -----------------------------------------------------------------------------TOTAL 0 0 0 8 18 0 49 174 0 4 34 65 MEAN 0 0 0 0 1 0 2 6 0 0 1 2 MAX 0 0 0 57 33 0 26 30 0 66 78 89 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 17 36 0 96 345 0 8 67 128 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 352 MEAN 1 MAX 89 MIN 0 AC_FT 697 Surface Water Streamflow Data Page 20 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 4753 Name: Old Xcut @ Thomas Period of Record: 07/26/94 to 06/18/97* Revised Records: WY1996: WY1995 Discharge, in cfs, Water Year October 1996 to September 1997 Day Jan. 13 Peak discharges of interest greater than 50 cfs during Water Year 1997: Peak Discharge (cfs) 104 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 1 1 1 1 39 79 3 2 2 1 1 1 1 1 24 107 3 3 2 1 1 2 1 14 59 83 3 4 2 1 1 1 1 42 51 60 3 5 2 1 2 1 1 25 67 54 3 6 2 2 3 1 1 39 92 89 3 7 2 2 3 1 1 34 76 21 3 8 2 2 2 1 1 38 60 141 3 9 2 1 1 2 1 40 51 141 3 10 2 1 1 2 1 83 22 63 3 11 1 1 1 2 1 27 54 62 3 12 2 1 2 2 1 23 57 96 3 13 2 1 2 29 1 41 56 27 3 14 2 1 2 2 23 60 2 3 15 1 2 2 1 44 48 3 3 16 1 2 2 1 43 76 2 3 17 2 2 2 1 71 81 1 3 18 2 2 1 1 48 97 1 3 19 2 2 2 1 23 61 2 20 2 2 1 1 74 77 1 21 2 1 1 1 25 39 143 2 22 2 1 1 1 21 51 109 2 23 2 1 1 1 38 87 74 2 24 2 1 1 1 24 44 43 3 25 2 1 2 1 16 25 37 3 26 3 1 1 1 29 28 52 3 27 2 1 1 1 51 11 39 3 28 2 1 1 1 1 32 91 3 29 2 2 1 1 50 41 3 30 1 1 1 1 51 89 3 31 1 1 1 69 3 -----------------------------------------------------------------------------TOTAL 59 46 50 74 219 1221 1926 1062 76 ------MEAN 2 2 2 2 8 39 64 34 3 ------MAX 17 8 3 104 254 173 225 225 3 ------MIN 1 1 1 1 0 0 2 1 3 ------AC_FT 117 91 99 147 435 2422 3820 2107 150 -----------------------------------------------------------------------------------WTR YR 1997 TOTAL 4734 MEAN 14 MAX 254 MIN 0 AC_FT 9390 Note: High daily mean values shown for late Feb., March, April, and early May due to presence of a temporary construction dam across the channel which caused backwater onto the gage. Surface Water Streamflow Data Page 21 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow * Gage discontinued 06/18/97. Surface Water Streamflow Data Page 22 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 4803 Name: Dreamy Draw Dam Drainage Area: 1.3 mi 2 Period of Record: Nov. 1987 to current year Revised Records: WY1996: WY1995 Discharge, in cfs, Water Year October 1996 to September 1997 Day Sept. 11 Peak outflows occurred on following days during Water Year 1997: Peak Discharge (cfs) 17 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 1 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 17 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 1 0 0 0 0 0 0 2 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 1 MEAN 0 MAX 17 MIN 0 AC_FT 2 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 23 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 4808 Name: ACDC @ 36 St Drainage Area: 4.82 mi 2 Period of Record: 02/24/94 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Jan. 13 Peak flows of interest during Water Year 1997: Day Peak Discharge (cfs) Peak Discharge (cfs) 5 Sept. 12 7 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 1 12 2 13 1 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 -----------------------------------------------------------------------------TOTAL 1 0 0 1 1 0 1 0 0 0 1 3 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 3 0 0 5 3 0 2 0 0 0 2 7 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 2 0 0 2 2 0 1 0 0 0 3 5 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 8 MEAN 0 MAX 7 MIN 0 AC_FT 15 Flood Flow Frequency (HEC-1 for ACDC ADMS) Magnitude and Probability of Instantaneous Peak Flow Surface Water Streamflow Data Page 24 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow 2-year 590 Surface Water Streamflow Data Page 25 Discharge, in cfs, for Indicated Recurrence Interval 10-year 100-year 2,510 5,410 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 4813 Name: ACDC @ 14 St Drainage Area: 10.2 mi 2 Period of Record: 02/09/94 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Jan. 4 Sept. 11 Peak flows of interest during Water Year 1997: Day Peak Discharge (cfs) Peak Discharge (cfs) 21 58 Jan. 13 21 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 1 5 6 7 8 9 10 11 11 12 10 13 1 22 14 20 15 1 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 0 3 0 0 0 0 0 0 0 64 MEAN 0 0 0 0 0 0 0 0 0 0 0 2 MAX 0 0 0 21 0 0 0 0 0 0 0 58 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 5 0 0 0 0 0 0 0 127 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 66 MEAN 0 MAX 58 MIN 0 AC_FT 132 Note: Flows on Sept. 12-15, 1997 from water treatment plant releases upstream. Flow on Sept. 11, 1997 storm generated. Surface Water Streamflow Data Page 26 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Surface Water Streamflow Data Page 27 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 4818 Name: 10 St.Wash Basin #1 Drainage Area: 1.21 mi 2 Period of Record: 11/26/96 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Sept. 11 Peak flows of interest during Water Year 1997: Peak Discharge (cfs) 12 Daily Mean Values OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------TOTAL --0 0 0 0 0 0 0 0 0 0 2 MEAN --0 0 0 0 0 0 0 0 0 0 0 MAX --0 0 1 3 0 2 0 0 0 0 12 MIN --0 0 0 0 0 0 0 0 0 0 0 AC_FT --0 0 0 0 0 0 0 0 0 0 4 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 3 MEAN 0 MAX 12 MIN 0 AC_FT 5 Note: Gage installed 11/26/96. Also, about 300 cfs bypasses the basin in Tenth Street Wash. Surface Water Streamflow Data Page 28 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 4823 Name: ACDC @ 43 Av Drainage Area: 56 mi2 below Cave Buttes Dam Period of Record: 12/17/91 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Feb. 27 Peak flows of interest during Water Year 1997: Peak Discharge (cfs) Day Peak Discharge (cfs) 497 Sept. 11 886 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 11 237 12 26 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 85 28 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 0 0 85 0 0 0 0 0 0 262 MEAN 0 0 0 0 3 0 0 0 0 0 0 9 MAX 0 0 0 0 497 0 0 0 0 0 0 886 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 168 0 0 0 0 0 0 520 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 347 MEAN 1 MAX 886 MIN 0 AC_FT 688 Surface Water Streamflow Data Page 29 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 4833 Name: Cave Creek @ Cactus Drainage Area: 33.6 mi 2 below Cave Buttes Dam Period of Record: 06/21/91 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Jan. 15 Sept. 11 Peak flows of interest during Water Year 1997: Day Peak Discharge (cfs) Peak Discharge (cfs) 151 194 Mar. 1 160 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 142 2 31 3 1 4 5 6 7 8 9 10 11 69 12 53 13 20 6 14 21 2 15 136 16 74 17 34 18 15 19 6 20 2 21 22 23 24 25 26 27 9 28 116 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 0 308 125 174 0 0 0 0 0 130 MEAN 0 0 0 10 4 6 0 0 0 0 0 4 MAX 0 0 0 151 139 160 0 0 0 0 0 194 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 611 248 345 0 0 0 0 0 257 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 737 MEAN 2 MAX 194 MIN 0 AC_FT 1462 Note: Receeding limbs of hydrographs greatly affected by clogging of outlet orifice. Therefore, low flows for falling hydrographs may be unrealistically high. See downstream stations 4823 and 5523 for a better representation of the falling limbs. Flood Flow Frequency (HEC-1 for ACDC ADMS) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 2-year 10-year 100-year 2,225 5,750 14,240 Surface Water Streamflow Data Page 30 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 4903 Name: Cave Buttes Outlet Drainage Area: 191 mi 2 at Cave Buttes Dam Period of Record: Nov. 1987 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Jan. 14 Sept. 12 Peak flows of interest during Water Year 1997: Peak Discharge (cfs) Day Peak Discharge (cfs) 160 76 Feb. 28 155 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 53 2 3 7 4 5 7 6 7 8 9 10 11 12 25 13 14 89 15 28 16 17 18 19 20 21 22 23 24 25 26 27 1 28 103 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 0 132 104 53 0 0 0 0 0 25 MEAN 0 0 0 4 4 2 0 0 0 0 0 1 MAX 0 0 0 160 155 135 0 0 0 0 0 76 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 261 206 106 0 0 0 0 0 49 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 313 MEAN 1 MAX 160 MIN 0 AC_FT 621 Note: This is the outflow from Cave Buttes Dam. See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 31 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 4918 Name: Cave Cr nr Cave Cr Drainage Area: 121 mi 2 Period of Record: USGS ID# 09512300 -- 05/17/58 to 09/30/67; 1968-1994 (annual peaks only) FCDMC -- 05/27/94 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Peak flows of interest during Water Year 1997: Day Peak Discharge (cfs) Peak Discharge (cfs) Day Jan. 14 Sept. 11 279 162 Feb. 28 279 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 129 2 1 11 12 13 14 15 14 1 132 138 27 28 5 169 -----------------------------------------------------------------------------TOTAL 0 0 0 271 174 130 0 0 0 0 0 14 MEAN 0 0 0 9 6 4 0 0 0 0 0 0 MAX 0 0 0 279 279 129 0 0 0 0 0 162 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 537 345 258 0 0 0 0 0 29 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 589 MEAN 2 MAX 279 MIN 0 AC_FT 1168 2-year 1,420 Flood Flow Frequency (based on HECWRC implementation of Bulletin 17B, n = 38) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 5-year 10-year 20-year 50-year 4,420 7,670 11,900 18,900 Surface Water Streamflow Data Page 32 100-year 25,600 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 4923 Name: Cave Cr.@ SpurCross USGS Gage: Cave Creek below Cottonwood Creek, ID# 09512280 Drainage Area: 82.7 mi 2 See USGS Water-Data Report AZ-97-1 for data for this site. 2-year 970 Flood Flow Frequency (based on HECWRC implementation of Bulletin 17B, n = 18) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 5-year 10-year 20-year 50-year 2,970 5,260 8,370 14,000 Surface Water Streamflow Data Page 33 100-year 19,700 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5103 Name: Centennial Railroad USGS Gage: Centennial Wash at SPRR, near Arlington, ID# 09517490 Drainage Area: 1,817 mi 2 See USGS Water-Data Report AZ-97-1 for data for this site. 2-year 830 Flood Flow Frequency (based on HECWRC implementation of Bulletin 17B, n = 12) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 5-year 10-year 20-year 50-year 4,510 10,600 21,200 45,200 Surface Water Streamflow Data Page 34 100-year 74,400 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5113 Name: Saddleback FRS Drainage Area: 29.6 mi 2 excluding area brought in from Harquahala FRS Period of Record: 12/16/88 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Aug. 8 Peak outflows of interest occurred on following days during Water Year 1997: Day Peak Discharge (cfs) Peak Discharge (cfs) 64 Sept. 25 47 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 5 9 5 10 11 9 12 13 14 15 16 17 3 18 2 19 20 21 22 23 24 25 6 26 27 3 28 3 29 30 1 31 6 -----------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 23 22 MEAN 0 0 0 0 0 0 0 0 0 0 1 1 MAX 0 0 0 0 0 0 0 0 0 0 64 47 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 45 43 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 44 MEAN 0 MAX 64 MIN 0 AC_FT 88 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 35 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5128 Name: Harquahala FRS Drainage Area: 102.3 mi 2 Period of Record: 03/01/94 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Aug. 8 Peak outflow occurred on the following day during Water Year 1997: Peak Discharge (cfs) 292 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 16 9 31 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 47 0 MEAN 0 0 0 0 0 0 0 --0 0 2 0 MAX 0 0 0 0 0 0 0 --0 0 292 0 MIN 0 0 0 0 0 0 0 --0 0 0 0 AC_FT 0 0 0 0 0 0 0 --0 0 93 0 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 47 MEAN 0 MAX 292 MIN 0 AC_FT 93 Gage out of service 04/23/97 to 06/18/97 due to instrument failure. No outflows missed. See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 36 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5153 Name: Narrows Dam Drainage Area: 684 mi 2 Period of Record: 09/01/94 to 05/09/96; 04/29/97 to current year* Discharge, in cfs, Water Year October 1996 to September 1997 Peak outflows of interest during Water Year 1997: Day Peak Discharge (cfs) Peak Discharge (cfs) Day Aug. 18 Sept. 26 152 2,610** Aug. 31 262 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 166 2 93 18 19 20 129 128 41 25 26 27 28 61 970 342 16 31 129 -----------------------------------------------------------------------------TOTAL ------------0 0 0 0 426 1648 MEAN ------------0 0 0 0 14 55 MAX ------------0 0 0 0 262 2610 MIN ------------0 0 0 0 0 0 AC_FT ------------0 0 0 0 845 3269 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 2074 MEAN 6 MAX 2610 MIN 0 AC_FT 4115 Flood of September 25-27, 1997 on Centennial Wash at Narrows Dam 15 Minute Maximum Discharges** Discharge (cfs)** 3000 Approximate Time of Dam Breach 2500 2000 1500 1000 500 0 9/25/97 12:00 9/26/97 0:00 9/26/97 12:00 9/27/97 0:00 9/27/97 12:00 9/28/97 0:00 Date and Time * Gage down from 05/09/96 to 04/29/97 due to construction. Gage reinstalled on principle outlet 04/29/97. ** Outflow shown for maximum stage over emergency spillway before dam failure on 09/26/97. Actual peak outflow may have been higher during dam failure. Maximum inflow estimated at 8,100 cfs based on slopeconveyance survey upstream of dam near Salome, AZ. Surface Water Streamflow Data Page 37 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5203 Name: Buckeye FRS #1 Drainage Area: 74 mi2 without area from Buckeye FRS #2 and #3 Period of Record: Nov. 1987 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Aug. 8 Sept. 2 Peak outflows of interest during Water Year 1997: Day Peak Discharge (cfs) Peak Discharge (cfs) 94 15 Aug. 17 Sept. 11 59 6 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 2 11 3 3 4 5 6 7 8 8 9 35 10 5 11 1 12 13 14 15 16 17 13 18 14 19 2 20 21 22 23 24 25 26 27 28 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 78 17 MEAN 0 0 0 0 0 0 0 0 0 0 3 1 MAX 0 0 0 0 0 0 0 0 0 0 94 15 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 0 0 0 0 0 0 154 34 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 95 MEAN 0 MAX 94 MIN 0 AC_FT 188 Note: Because of local drawdown effects at the gage on the principle outlet, discharges for stages below about 1 foot gage height are approximate. See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 38 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5208 Name: Buckeye FRS #2 Drainage Area: 5.7 mi 2 without area from Buckeye FRS #3 Period of Record: 11/11/92 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Aug. 8 Peak outflows of interest during Water Year 1997: Day Peak Discharge (cfs) Peak Discharge (cfs) 19 Aug. 30 20 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 1 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 2 30 1 31 1 -----------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 6 1 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 20 4 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 12 1 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 7 MEAN 0 MAX 20 MIN 0 AC_FT 13 Note: Because of local drawdown effects at the gage on the principle outlet, discharges for stages below about 1 foot gage height are approximate. See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 39 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5223 Name: Hassy nr Morristown USGS Gage: Hassayampa River near Morristown, ID# 09516500 Drainage Area: 796 mi 2 See USGS Water-Data Report AZ-97-1 for data for this site. 2-year 2,920 Flood Flow Frequency (based on HECWRC implementation of Bulletin 17B, n = 44, expected probability show as it plots closer to observed data) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 5-year 10-year 20-year 50-year 10,200 18,400 29,200 47,500 Surface Water Streamflow Data Page 40 100-year 64,700 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5228 Name: Hassayampa @ US 60 Drainage Area: 711 mi 2 Period of Record: 03/14/94 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Peak flows of interest during Water Year 1997: Peak Discharge (cfs) Day Sept. 26 15,376 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------26 2181 -----------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 2181 MEAN 0 0 0 0 0 0 0 0 0 0 0 73 MAX 0 0 0 0 0 0 0 0 0 0 17 15376 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 4326 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 2181 MEAN 6 MAX 15376 MIN 0 AC_FT 4327 Discharge (cfs) 16000 14000 Flood of September 26, 1997 on the Hassayampa River @ US 60 15 Minute Maximum Discharges 12000 10000 8000 6000 4000 2000 0 0:00 2:00 4:00 6:00 8:00 10:00 12:00 14:00 16:00 Time on Sept. 26, 1997 Note: This gage location is a wide mobile sand bed channel. Therefore, data reliability is considered poor. See also gage 5308 upstream and USGS gage Hassayampa River near Morristown, 09516500, downstream for additional data and comparative flood flow frequency for this site. Surface Water Streamflow Data Page 41 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5233 Name: Sunset FRS Drainage Area: 0.95 mi 2 (from Wickenburg ADMS) Period of Record: 02/12/89 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Feb. 28 Sept. 5 Peak outflows of interest during Water Year 1997 assumming outlet gate fully open: Peak Discharge (cfs) Day Peak Discharge (cfs) 14 18 Aug. 9 Sept. 26 14 43 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 13 2 12 3 12 7 4 11 11 5 11 10 4 2 6 10 9 12 17 7 9 6 11 16 8 3 11 15 9 14 15 10 12 14 11 12 14 12 11 13 13 11 10 13 14 12 10 12 15 11 9 11 16 11 6 3 17 10 18 7 19 2 20 21 22 23 7 24 9 25 9 26 2 33 27 8 27 28 14 25 29 24 30 23 31 -----------------------------------------------------------------------------TOTAL 0 0 0 64 24 81 44 0 0 0 122 298 MEAN 0 0 0 2 1 3 1 0 0 0 4 10 MAX 0 0 0 12 14 13 11 0 0 0 14 43 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 126 48 160 87 0 0 0 242 591 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 632 MEAN 2 MAX 43 MIN 0 AC_FT 1254 Surface Water Streamflow Data Page 42 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Note: Outflow based on assumption that the outlet gate is fully open. See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 43 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5248 Name: Sunnycove FRS Drainage Area: 0.98 mi 2 (from Wickenburg ADMS) Period of Record: Nov. 1987 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Sept. 26 Peak outflows of interest during Water Year 1997 assumming outlet gate fully open: Peak Discharge (cfs) 44* Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 1 2 6 19 7 18 8 18 9 18 10 18 11 18 12 18 13 17 14 15 15 16 17 18 19 20 21 22 23 24 25 4 26 39 27 10 28 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 1 214 MEAN 0 0 0 0 0 0 0 0 0 0 0 7 MAX 0 0 0 0 0 0 0 0 0 0 18 44* 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 2 424 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 215 MEAN 1 MAX 44* MIN 0 AC_FT 426 Note: Outflow based on assumption that the outlet gate is fully open. See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 44 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow * Maximum based on high water marks for 9/26/97 event. Due to gage failure during this event, mean values should be considered estimates. Surface Water Streamflow Data Page 45 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5283 Name: Hassayampa R @ I-10 Drainage Area: approximately 1,450 mi 2 Period of Record: 11/09/94 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Peak flows of interest during Water Year 1997: Peak Discharge (cfs) Day Sept. 26 7,440* OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 7440* 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 1997 TOTAL 14797 MEAN 41 MAX 7440 MIN 0 AC_FT 29349 * Peak flow estimated from high water marks. Gage failed to operate during multiple events in August and September 1997. Therefore, no volumes or mean values are reported. See also USGS gages, 09517000, Hassayampa River near Arlington, 09516500, Hassayampa River near Morristown, and 09516800, Jackrabbit Wash near Tonapah, for additional data on volumes and August and September 1997 peak flows. Note: This location has a mobile sand bed with multiple channels. Therefore, data reliability should be considered poor. Flood Flow Frequency (from R.W. Cruff analysis of 1995 based on shape of Hassayampa near Arlington relation) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 2-year 5-year 10-year 25-year 50-year 100-year 2,500 8,000 15,000 32,000 51,000 75,000 Surface Water Streamflow Data Page 46 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5308 Name: Hassy @ Box Canyon Drainage Area: 416 mi 2 Period of Record: USGS ID# 09515500 -- 1925, 1927, 1937, 1938 (annual peaks only); 1946-1982; FCDMC -- Nov. 1987 to current year Revised Records: WY1996: WY1994-95. WY1997: WY1996 Discharge, in cfs, Water Year October 1996 to September 1997 Peak flows of interest during Water Year 1997: Day Peak Discharge (cfs) Peak Discharge (cfs) Day Jan. 14 Feb. 28 * 525* 453 Jan. 27 Sept. 26 158 3,549* From high water marks in stilling well. Flood of September 26, 1997 on the Hassayampa River at Box Canyon 15 Minute Maximum Discharges Discharge (cfs) 4000 3000 2000 1000 0 0:00 2:00 4:00 6:00 8:00 10:00 Time on Sept. 26, 1997 12:00 14:00 16:00 Flood Flow Frequency (based on HECWRC implementation of Bulletin 17B, n = 46) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 2-year 5-year 10-year 20-year 50-year 100-year 4,020 12,200 21,200 32,900 53,000 72,200 Continued on following page. Surface Water Streamflow Data Page 47 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5308 Name: Hassy @ Box Canyon (cont.) Drainage Area: 416 mi 2 Period of Record: USGS ID# 09515500 -- 1925, 1927, 1937, 1938 (annual peaks only); 1946-1982; FCDMC -- Nov. 1987 to current year Revised Records: WY1996: WY1994-95. WY1997: WY1996 Discharge, in cfs, Water Year October 1996 to September 1997 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 5 2 2 3 5 63 2 5 2 2 3 5 30 3 5 4 3 3 5 21 5 4 5 2 3 2 5 15 14 5 6 2 2 2 5 11 23 6 5 2 3 1 5 12 19 7 5 2 2 2 5 11 13 8 3 2 3 1 5 11 9 9 3 2 2 1 5 12 9 10 3 2 2 1 5 11 8 11 3 2 2 1 5 10 8 7 12 3 2 1 1 5 10 8 7 13 3 2 1 45 5 9 7 14 4 2 1 175 5 9 6 15 2 3 1 123 5 8 6 16 3 3 1 123 4 7 5 17 3 2 1 74 4 6 5 18 2 3 1 6 4 6 5 19 2 5 1 6 4 6 4 20 2 4 2 6 4 5 21 2 3 3 6 4 5 22 2 2 3 5 4 5 23 2 2 4 5 4 5 24 2 2 3 5 4 5 25 2 2 5 5 4 5 1 26 3 2 4 6 4 5 1002 27 2 2 5 114 4 4 64 28 2 2 4 82 133 4 29 2 2 3 18 4 30 2 2 3 7 4 31 2 3 6 1 -----------------------------------------------------------------------------TOTAL 89 68 74 838 257 321 156 0 0 0 1 1081 MEAN 3 2 2 27 9 10 5 0 0 0 0 36 MAX 6 5 6 525* 453 80 24 0 0 0 6 3549* MIN 2 2 1 1 4 0 0 0 0 0 0 0 AC_FT 177 135 146 1662 510 636 310 0 0 0 1 2144 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 2885 MEAN 8 MAX 3549* MIN 0 AC_FT 5722 * From high water marks in stilling well. Surface Water Streamflow Data Page 48 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5308 Name: Hassy @ Box Canyon Drainage Area: 416 mi 2 Period of Record: USGS ID# 09515500 -- 1925, 1927, 1937, 1938 (annual peaks only); 1946-1982; FCDMC -- Nov. 1987 to current year Revised Records: WY1996: WY1994-95. WY1997: WY1996 Discharge, in cfs, Water Year October 1995 to September 1996 -- REVISED Day July 25 Sept. 5 Peak flows of interest during Water Year 1996: Day Peak Discharge (cfs) Peak Discharge (cfs) 7,548 256 Aug. 19 Sept. 7 192 164 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 6 28 2 6 8 3 5 5 4 5 4 5 5 68 6 5 43 7 5 95 8 5 8 9 5 7 10 5 7 11 5 7 12 5 7 13 5 7 14 5 6 15 5 6 16 5 6 17 5 6 18 5 6 19 48 5 20 6 6 21 5 6 22 5 5 23 5 6 24 5 5 25 230 5 5 26 23 5 5 27 6 5 5 28 6 5 5 29 6 5 5 30 6 5 5 31 6 5 -----------------------------------------------------------------------------TOTAL 0 0 5 8 7 8 8 8 8 288 192 398 MEAN 0 0 0 0 0 0 0 0 0 9 6 13 MAX 0 0 0 0 0 0 0 0 0 7548 192 256 MIN 0 0 0 0 0 0 0 0 0 0 5 3 AC_FT 0 0 10 16 15 16 15 16 15 571 380 789 -----------------------------------------------------------------------------WTR YR 1996 TOTAL 928 MEAN 3 MAX 7548 MIN 0 AC_FT 1841 Surface Water Streamflow Data Page 49 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow WY 1996 revision based on reevaluation of elevation of instrument diaphragm. Surface Water Streamflow Data Page 50 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5353 Name: Hassy @ Wagoner Rd Drainage Area: 78 mi2 Period of Record: 09/26/91 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Feb. 27 Sept. 26 Peak flows of interest during Water Year 1997: Peak Discharge (cfs) Day Peak Discharge (cfs) 70 214 Aug. 30 109 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 1 45 9 12 11 18 6 2 1 33 14 11 11 18 7 3 1 33 17 12 11 18 5 4 1 31 20 12 11 18 2 5 1 25 14 12 11 18 2 6 1 23 7 12 12 18 1 7 1 25 5 12 12 19 4 1 8 1 1 24 3 12 12 20 2 1 9 2 2 20 5 12 12 20 8 10 2 1 17 10 12 12 20 4 11 2 1 18 10 12 12 20 3 12 1 1 19 11 12 12 20 4 13 8 15 11 12 13 20 1 3 14 3 1 19 11 12 14 17 1 3 15 2 1 18 11 12 14 17 1 3 16 2 1 17 11 12 16 7 2 4 17 2 1 14 11 11 16 2 4 18 2 1 8 11 12 16 3 6 19 2 1 7 11 11 16 3 8 20 1 1 7 12 13 16 3 8 21 2 1 7 12 14 16 2 7 22 1 1 8 12 12 16 2 8 23 2 1 10 14 12 17 2 10 24 2 1 10 14 12 18 2 10 25 1 1 8 14 12 18 3 17 26 2 4 7 11 12 17 5 125 27 3 35 8 11 12 18 6 32 28 2 67 8 11 11 18 7 17 29 2 7 11 12 18 8 15 30 2 6 12 12 18 19 14 31 1 6 11 9 -----------------------------------------------------------------------------TOTAL 0 0 0 50 133 503 331 368 431 288 86 334 MEAN 0 0 0 2 5 16 11 12 14 9 3 11 MAX 0 0 0 20 70 49 20 20 18 20 109 214 MIN 0 0 0 0 0 1 1 11 11 0 0 0 AC_FT 0 0 0 100 265 999 657 730 856 571 170 663 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 2526 MEAN 7 MAX 214 MIN 0 AC_FT 5011 Note: The pressure transducer at this location is often buried by sand and separated from the normal low base flow. Typically this base flow is on the order of 1-2 cfs. However, with the instrument under wet sand due to the high water table it frequently reads a high for low stages. Therefore, the mean daily flows shown here may be overreported for many days. Flood Flow Frequency (based on HECWRC implementation of Bulletin 17B, n = 12) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval Surface Water Streamflow Data Page 51 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow 2-year 595 Surface Water Streamflow Data Page 52 5-year 1,590 10-year 2,580 20-year 3,780 50-year 5,730 100-year 7,490 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5403 Name: Agua Fria @ Buckeye Drainage Area: 2241 mi 2, 1459 mi 2 controlled by New Waddell Dam, 191 mi 2 by Cave Buttes Dam, 90 mi 2 by Adobe Dam, and 164 mi 2by New River Dam, 247 mi 2 by McMicken Dam Period of Record: 10/12/88 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Sept. 11 Peak flows of interest occurred on following day during Water Year 1997: Peak Discharge (cfs) 856 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 11 122 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 0 122 MEAN 0 0 0 0 0 0 0 0 0 0 0 4 MAX 0 0 0 0 0 39 0 0 0 0 0 856 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 0 242 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 122 MEAN 0 MAX 856 MIN 0 AC_FT 242 Surface Water Streamflow Data Page 53 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Note: Severe drop due to rocks along the downstream side of the Buckeye Road bridge as well as two channels for lower flows introduce considerable error into the rating for flows less than about 3,500 cfs. The multiple channels also mean some lower flows are missed by the gage. Surface Water Streamflow Data Page 54 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5408 Name: Colter @ El Mirage Drainage Area: 3.48 mi 2 Period of Record: 06/29/94 to current year Discharge, in cfs, Water Year October 1996 to September 1997 No flow occurred during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 Flood Flow Frequency (HEC-1 for Colter Channel Design Analysis) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 100-year 1,040 Surface Water Streamflow Data Page 55 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5413 Name: Dysart Drain @ LAFB Drainage Area: 52 mi2 Period of Record: 08/22/96 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Jan. 13 Peak flows of interest during Water Year 1997: Day Peak Discharge (cfs) Peak Discharge (cfs) 10 Feb. 27 26 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 2 2 1 3 1 4 2 5 1 1 1 1 1 6 1 1 7 1 1 1 1 8 5 2 1 9 4 1 1 1 10 2 1 11 1 1 1 2 12 1 1 13 2 1 14 15 1 1 16 17 1 18 1 1 19 1 1 20 2 1 21 1 22 1 23 1 1 24 1 25 1 1 26 1 2 27 6 28 6 1 29 1 30 1 1 31 -----------------------------------------------------------------------------TOTAL 0 0 0 20 29 0 7 20 17 7 0 0 MEAN 0 0 0 1 1 0 0 1 1 0 0 0 MAX 0 0 0 10 26 0 1 5 3 2 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 40 57 1 14 39 33 14 0 0 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 99 MEAN 0 MAX 26 MIN 0 AC_FT 197 Note: Many days of positive mean daily flows due to irrigation tailwater. Flood Flow Frequency (HEC-1 for White Tanks ADMS modified for Dysart Channel Design Analysis) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 100-year 2,340 Surface Water Streamflow Data Page 56 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5418 Name: White Tanks #3 FRS Drainage Area: 20.5 mi 2 (White Tanks ADMS) Period of Record: Nov. 1987 to current year Discharge, in cfs, Water Year October 1996 to September 1997 No outflow during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 57 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5423 Name: Dysart Chnl@ El Mir Drainage Area: 58.2 mi 2 Period of Record: 06/23/94 to 12/26/95;03/07/97 to current year.* Discharge, in cfs, Water Year October 1996 to September 1997 No flow since date of installation during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------TOTAL ----------0 0 0 0 0 0 0 MEAN ----------0 0 0 0 0 0 0 MAX ----------0 0 0 0 0 0 0 MIN ----------0 0 0 0 0 0 0 AC_FT ----------0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 * Gage reinstalled 03/07/19997 on new Dysart Channel. Previously on old Dysart Drain about 1,000 feet upstream of El Mirage Road. Flood Flow Frequency (HEC-1 for White Tanks ADMS modified for Dysart Channel Design Analysis) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 100-year 4,020 Surface Water Streamflow Data Page 58 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5438 Name: McMicken Floodway Drainage Area: approximately 305 mi 2 Period of Record: 09/03/92 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Sept. 25 No flow except on following day during Water Year 1997: Peak Discharge (cfs) 6 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 4 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 6 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 8 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 4 MEAN 0 MAX 6 MIN 0 AC_FT 8 Note: Flows during Water Year 1997 generated below McMicken Dam. No outflow occurred from McMicken Dam into the floodway during Water Year 1997. See also gage ID# 5448. Flood Flow Frequency (FEMA 9/95, “at confluence with McMicken Dam”) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 10-year 50-year 100-year 2,610 4,280 5,090 Surface Water Streamflow Data Page 59 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5448 Name: McMicken Dam Drainage Area: 247 mi 2 Period of Record: Nov. 1987 to current year Discharge, in cfs, Water Year October 1996 to September 1997 No outflow during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 60 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5503 Name: Agua Fria @ Grand USGS Gage: Agua Fria at El Mirage, ID# 09513650 Drainage Area: 1,628 mi 2 of which 1,433 mi 2 is controlled by New Waddel Dam See USGS Water-Data Report AZ-97-1 for data for this site. Surface Water Streamflow Data Page 61 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5508 Name: NewRiver @ Glendale USGS Gage: New River near Glendale, AZ, ID# 09513910 Drainage Area: 600 mi 2 of which 191 mi 2 is controlled by Cave Buttes Dam, 164 mi 2 by New River Dam, and 90 mi 2 by Adobe Dam See USGS Water-Data Report AZ-97-1 for data for this site. Surface Water Streamflow Data Page 62 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5523 Name: ACDC @ 67 Av Drainage Area: 86 mi2 at confluence with Skunk Creek Period of Record: 06/07/90 to current year Revised Records: WY1996: WY1994-95. Discharge, in cfs, Water Year October 1996 to September 1997 Peak flows of interest during Water Year 1997: Day Peak Discharge (cfs) Peak Discharge (cfs) Day Jan. 13 Sept. 11 180 939 Feb. 27 390 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 3 108 2 1 55 3 3 2 2 8 11 24 4 13 14 5 5 1 6 8 7 1 1 8 5 2 9 6 23 10 2 11 278 12 4 90 13 87 14 14 1 4 24 7 15 8 3 53 2 16 3 33 17 5 14 18 10 19 6 20 21 22 4 2 23 3 24 5 25 5 26 10 2 3 27 6 5 56 28 5 197 29 3 30 5 31 -----------------------------------------------------------------------------TOTAL 29 30 27 255 256 171 30 0 5 2 55 397 MEAN 1 1 1 8 9 6 1 0 0 0 2 13 MAX 8 21 21 180 390 120 27 0 11 9 88 939 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 58 60 53 506 507 340 60 0 10 4 110 787 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 1258 MEAN 3 MAX 939 MIN 0 AC_FT 2495 2-year 1,900 Flood Flow Frequency Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 5-year 10-year 25-year 50-year 4,500 7,700 13,500 20,600 Surface Water Streamflow Data Page 63 100-year 29,000 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5538 Name: Adobe Dam Outlet Drainage Area: 89.6 mi 2 at Adobe Dam Period of Record: Nov. 1987 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Jan. 14 Peak flows of interest during Water Year 1997: Day Peak Discharge (cfs) Peak Discharge (cfs) 31 Sept. 12 33 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 10 13 14 13 15 7 16 1 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 0 22 0 0 0 0 0 0 0 12 MEAN 0 0 0 1 0 0 0 0 0 0 0 0 MAX 0 0 0 31 0 0 0 0 0 0 0 33 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 44 0 0 0 0 0 0 0 23 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 34 MEAN 0 MAX 33 MIN 0 AC_FT 67 Surface Water Streamflow Data Page 64 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5543 Name: Scatter Wash Drainage Area: 18.1 mi 2 Period of Record: 09/18/96 to current year Discharge, in cfs, Water Year October 1996 to September 1997 No flow except on following day during Water Year 1997: Peak Discharge (cfs) Day Sept. 11 87* OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 87* 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 1997 TOTAL 30 MEAN 0 MAX 87 MIN 0 AC_FT 59 * Maximum discharge from high water marks. Gage failed to operate during event due to instrument failure. Therefore, no daily mean flow or volume is given for September 1997. Flood Flow Frequency (Channel Design Analysis) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 100-year 6,100 Surface Water Streamflow Data Page 65 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5568 Name: Skunk Creek @ I-17 USGS Gage: Skunk Creek near Phoenix, AZ, ID# 09513860 Drainage Area: 64.9 mi 2 See USGS Water-Data Report AZ-97-1 for data for this site. 2-year 1,070 Flood Flow Frequency (based on HECWRC implementation of Bulletin 17B, n = 38, station skew used based on examination of observed data plots) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 5-year 10-year 20-year 50-year 3,960 7,100 11,000 17,300 Surface Water Streamflow Data Page 66 100-year 22,800 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5583 Name: Skunk Cr. nr New R. Drainage Area: approximately 4 mi 2 Period of Record: 06/21/95 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Jan. 13 Sept. 11 Peak flows of interest during Water Year 1997: Day Peak Discharge (cfs) Peak Discharge (cfs) 91 109 Jan. 26 56 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 13 3 14 1 15 16 17 18 19 20 21 22 23 24 25 26 2 27 1 28 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 0 7 0 0 0 0 0 0 0 4 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 91 0 0 0 0 0 0 0 109 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 13 0 0 0 0 0 0 0 7 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 10 MEAN 0 MAX 109 MIN 0 AC_FT 20 Flood Flow Frequency (FEMA 9/95) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 10-year 50-year 100-year 1,730 2,500 3,650 Surface Water Streamflow Data Page 67 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5598 Name: New River @ Bell Drainage Area: 185 mi 2 of which 164 mi 2 are controlled by New River Dam Period of Record: 04/04/90 to current year* Revised Records: WY1996: WY1995 Discharge, in cfs, Water Year October 1996 to September 1997 No flow occurred during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 * USGS period of record: water years 1963, 1965-67 (annual maximums only), 1968-1984, June 1990Sept. 1993. Also, FCDMC gage out from 10/01/93 to 05/12/94 during construction of new bridge. 2-year 1,920 Flood Flow Frequency (based on R. W. Cruff analysis, 1995) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 5-year 10-year 25-year 50-year 6,510 11,700 21,200 30,500 Surface Water Streamflow Data Page 68 100-year 41,800 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5613 Name: New River Outlet Drainage Area: 164 mi 2 at New River Dam Period of Record: Nov. 1987 to current year Discharge, in cfs, Water Year October 1996 to September 1997 No flow during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 69 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5968 Name: StoneRidge Dam Drainage Area: 0.86 mi 2 Period of Record: 12/11/96 to current year Discharge, in cfs, Water Year October 1996 to September 1997 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 3 14 3 15 1 16 1 17 18 19 20 21 22 23 24 25 26 2 27 28 29 30 31 -----------------------------------------------------------------------------TOTAL ----0 8 2 0 0 0 0 0 0 0 MEAN ----0 0 0 0 0 0 0 0 0 0 MAX ----0 4 4 0 0 0 0 0 5 5 MIN ----0 0 0 0 0 0 0 0 0 0 AC_FT ----0 16 4 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 10 MEAN 0 MAX 5 MIN 0 AC_FT 20 Note: Gage installed on 12/11/1996. Surface Water Streamflow Data Page 70 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5973 Name: SunRidge Canyon Dam Drainage Area: 1.6 mi 2 Period of Record: 02/04/97 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Aug. 3 Peak outflows of interest during Water Year 1997: Peak Discharge (cfs) 18 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 12 4 6 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 18 0 MEAN --------0 0 0 0 0 0 1 0 MAX --------0 0 0 0 0 0 18 0 MIN --------0 0 0 0 0 0 0 0 AC_FT --------0 0 0 0 0 0 36 0 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 18 MEAN 0 MAX 18 MIN 0 AC_FT 36 Note: Gage installed on 02/04/1997. Surface Water Streamflow Data Page 71 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5978 Name: GoldenEaglePark Dam Drainage Area: 7.13 mi 2 of which 2.02 mi 2, 2.13 mi 2, and 1.6 mi 2 are controlled by Aspen, North Heights, and Sunridge Canyon Dams respectively Period of Record: 12/12/96 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Jan. 13 Sept. 11 Peak outflows above 1 foot gage height during Water Year 1997: Day Peak Discharge (cfs) Peak Discharge (cfs) 29 41 Aug. 26 33 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 5 1 4 5 6 7 8 2 9 10 11 5 12 1 13 5 14 9 15 5 16 17 18 19 20 21 22 23 24 25 26 1 3 27 4 6 28 8 29 30 31 -----------------------------------------------------------------------------TOTAL ----0 24 14 5 0 0 0 0 6 6 MEAN ----0 1 1 0 0 0 0 0 0 0 MAX ----0 29 24 10 0 0 0 0 33 41 MIN ----0 0 0 0 0 0 0 0 0 0 AC_FT ----0 47 28 10 0 0 0 0 11 12 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 55 MEAN 0 MAX 41 MIN 0 AC_FT 109 Surface Water Streamflow Data Page 72 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Note: Gage installed on 12/12/1996. Surface Water Streamflow Data Page 73 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5983 Name: North Heights Dam Drainage Area: 2.13 mi 2 Period of Record: 10/11/96 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Feb. 27 Peak outflows of interest during Water Year 1997: Day Peak Discharge (cfs) Peak Discharge (cfs) 11 Sept. 11 14 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 3 4 2 5 2 6 7 8 9 3 10 11 1 12 2 13 3 14 2 15 16 17 18 19 20 21 22 23 24 25 26 27 1 2 28 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 0 5 1 0 0 0 0 0 11 2 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 5 11 0 0 0 0 0 4 14 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 9 3 0 0 0 0 0 21 5 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 19 MEAN 0 MAX 14 MIN 0 AC_FT 38 Note: Gage installed on 10/11/1996. Surface Water Streamflow Data Page 74 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5988 Name: Aspen Dam Drainage Area: 2.02 mi 2 Period of Record: 01/02/97 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Sept. 11 Peak outflows of interest during Water Year 1997: Peak Discharge (cfs) 13 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 1 5 6 7 8 9 10 11 1 12 13 4 14 3 15 16 17 18 19 20 21 22 23 24 25 26 27 2 28 2 29 30 31 -----------------------------------------------------------------------------TOTAL ------7 4 0 1 0 0 0 0 1 MEAN ------0 0 0 0 0 0 0 0 0 MAX ------6 6 0 2 0 0 0 0 13 MIN ------0 0 0 0 0 0 0 0 0 AC_FT ------14 7 0 2 0 0 0 0 3 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 13 MEAN 0 MAX 13 MIN 0 AC_FT 26 Note: Gage installed on 01/02/1997. Surface Water Streamflow Data Page 75 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 5993 Name: Hesperus Dam Drainage Area: 2.91 mi 2 Period of Record: 12/18/96 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 5 4 1 5 6 7 8 9 10 11 12 13 14 2 15 4 16 17 18 19 20 21 22 23 24 25 26 27 4 28 9 29 30 31 -----------------------------------------------------------------------------TOTAL ----0 6 12 0 6 0 0 0 0 0 MEAN ----0 0 0 0 0 0 0 0 0 0 MAX ----0 12 12 0 12 0 0 0 0 0 MIN ----0 0 0 0 0 0 0 0 0 0 AC_FT ----0 12 24 0 12 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 24 MEAN 0 MAX 12 MIN 0 AC_FT 48 Note: Gage installed on 12/18/1996. Surface Water Streamflow Data Page 76 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 6503 Name: Guadalupe FRS Drainage Area: 1.87 mi 2 Period of Record: 06/29/89 to current year Discharge, in cfs, Water Year October 1996 to September 1997 No flow during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 77 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 6563 Name: South Mountain Fan Drainage Area: 1.98 mi 2 Period of Record: 06/09/93 to current year Revised Records: WY1996: WY1995 Discharge, in cfs, Water Year October 1996 to September 1997 No flow during Water Year 1997: OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 2-year 300 Flood Flow Frequency (based on HEC-1 analysis, 1997) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 5-year 10-year 25-year 50-year 650 990 1,500 2,000 Surface Water Streamflow Data Page 78 100-year 2,400 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 6573 Name: EMF @ Broadway Period of Record: 08/10/89 to current year Discharge, in cfs, Water Year October 1996 to September 1997 No flow during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 Surface Water Streamflow Data Page 79 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 6583 Name: EMF @ Queen Creek Period of Record: 01/18/89 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Jan. 14 Only peak flows during Water Year 1997: Peak Discharge (cfs) Day Peak Discharge (cfs) 8 Aug. 8 4 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 6 15 4 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 0 10 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 8 0 0 0 0 0 0 4 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 20 0 0 0 0 0 0 1 0 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 10 MEAN 0 MAX 8 MIN 0 AC_FT 21 Surface Water Streamflow Data Page 80 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 6598 Name: EMF @ Arizona Ave. Period of Record: 02/10/89 to current year Discharge, in cfs, Water Year October 1996 to September 1997 No flows during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 Surface Water Streamflow Data Page 81 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 6628 Name: Signal Butte FRS Drainage Area: 16.4 mi 2 not including area from Apache Junction FRS Period of Record: 11/10/87 to current year Discharge, in cfs, Water Year October 1996 to September 1997 No outflow during Water Year 1997.* OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 * No outflow through the principle outlet. However, some impoundment was experienced druing Water Year 1997. See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 82 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 6673 Name: Apache Jct. FRS Drainage Area: 5.8 mi 2 Period of Record: Nov. 1987 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Jan. 13 Peak outflows of interest during Water Year 1997: Peak Discharge (cfs) 10 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 3 14 2 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 0 4 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 10 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 9 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 4 MEAN 0 MAX 10 MIN 0 AC_FT 9 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 83 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 6683 Name: Powerline FRS Drainage Area: 49.9 mi 2 Period of Record: 12/03/92 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Nov. 23 Feb. 28 Peak outflows of interest during Water Year 1997: Peak Discharge (cfs) Day Peak Discharge (cfs) 2 3 Jan. 13 3 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 1 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 0 1 1 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 2 0 3 3 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 1 2 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 2 MEAN 0 MAX 3 MIN 0 AC_FT 4 Surface Water Streamflow Data Page 84 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Note: Outflows from Vineyard FRS backup through the Powerline outlet pipe and record on gage. Therefore, some “outflows” may represent backwater from Vineyard FRS outflows. See data for Station 6688. See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 85 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 6688 Name: Vineyard FRS Drainage Area: 57.8 mi 2 Period of Record: Nov. 1987 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Jan. 13 Peak outflows of interest during Water Year 1997: Peak Discharge (cfs) 5 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 3 15 1 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 0 6 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 5 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 12 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 6 MEAN 0 MAX 5 MIN 0 AC_FT 12 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 86 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 6703 Name: Rittenhouse FRS Drainage Area: 51.3 mi 2 Period of Record: 09/27/88 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Aug. 9 Peak outflows of interest during Water Year 1997: Peak Discharge (cfs) Day Peak Discharge (cfs) 31 Aug. 31 41 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 2 3 1 3 3 4 5 6 7 8 9 9 8 10 1 11 12 13 14 15 3 16 1 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 16 -----------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 42 3 MEAN 0 0 0 0 0 0 0 0 0 0 1 0 MAX 0 0 0 0 0 0 0 0 0 0 41 2 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 83 6 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 45 MEAN 0 MAX 41 MIN 0 AC_FT 89 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 87 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 6707* Name: Queen Ck.@ Rittenhouse Period of Record: 09/14/93 to current year Discharge, in cfs, Water Year October 1996 to September 1997 No flow above gage during Water Year 1997. Minimum flow recorded by gage is about 105 cfs at 1.4 ft gage height. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 * Gage ID number changed during Water Year 1997 from 6713 to 6707 to mitigate radio interference problems. Surface Water Streamflow Data Page 88 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 6813 Name: Buckeye FRS #3 Drainage Area: 9.3 mi 2 Period of Record: 11/23/92 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Aug. 8 Peak outflows of interest during Water Year 1997: Day Peak Discharge (cfs) Peak Discharge (cfs) 5 Sept. 1 8 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 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 1 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 5 8 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 1 1 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 1 MEAN 0 MAX 8 MIN 0 AC_FT 2 Note: Because of local drawdown effects at the gage on the principle outlet, discharges for stages below about 1 foot gage height are approximate. See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 89 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 6823 Name: White Tanks #4 FRS Drainage Area: 18.6 mi 2 (White Tanks ADMS) Period of Record: Nov. 1987 to current year Discharge, in cfs, Water Year October 1996 to September 1997 No outflow during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 90 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 6853 Name: Gila @ Estrella Pky USGS Gage: Gila River at Estrella Parkway, ID# 09514100 Drainage Area: 45,585 mi 2 See USGS Water-Data Report AZ-97-1 for data for this site. Flood Flow Frequency (source: Table 2-4 from Study for Modified Roosevelt Dam) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 5-year 10-year 20-year 50-year 100-year 20,000 50,000 84,000 170,000 217,000 Surface Water Streamflow Data Page 91 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 6893 Name: Estrella Fan Drainage Area: 1.0 mi 2 Period of Record: 04/30/93 to current year Revised Records: WY1997: WY 1996 Discharge, in cfs, Water Year October 1996 to September 1997 No flow during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 2-year 310 Flood Flow Frequency (HEC-1 analysis, 1997) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 5-year 10-year 25-year 50-year 860 1,280 1,800 2,250 100-year 2,710 Station Number: 6893 Name: Estrella Fan Drainage Area: 1.0 mi 2 Period of Record: 04/30/93 to current year Discharge, in cfs, Water Year October 1995 to September 1996 -- REVISED Day Sept. 13 Peak flows of interest during Water Year 1996: Peak Discharge (cfs) 10 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 10 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 1996 TOTAL 0 MEAN 0 MAX 10 MIN 0 AC_FT 0 Note: Mean daily flow for 09/13/96 rounds to zero acre-feet. Revised due to computer database error for this sensor during Water Year 1996 which was discovered during Water Year 1997. Previously no flow was reported for 1996. Surface Water Streamflow Data Page 92 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 6923 Name: Sauceda Wash Drainage Area: 126 mi 2 Period of Record: 02/28/90 to current year* Discharge, in cfs, Water Year October 1996 to September 1997 Peak flows of interest during Water Year 1997.** Day Peak Discharge (cfs) Peak Discharge (cfs) Day Jan. 13 Sept. 6 149 696 Aug. 17 304 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------6 31 7 3 13 6 17 18 18 1 -----------------------------------------------------------------------------TOTAL 0 0 0 6 0 0 0 0 0 0 20 34 MEAN 0 0 0 0 0 0 0 0 0 0 1 1 MAX 0 0 0 149 0 0 0 0 0 0 304 696 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 11 0 0 0 0 0 0 39 68 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 60 MEAN 0 MAX 696 MIN 0 AC_FT 118 Discharge (cfs) Flood of September 6, 1997 on Sauceda Wash 15 Minute Maximum Discharges 800 700 600 500 400 300 200 100 0 5:00 6:00 7:00 8:00 9:00 Time on Sept. 6, 1997 * USGS maintained a crest stage gage at this location from 11/27/63 to 09/30/79. In 1990 a joint USGS/FCDMC continuous station was installed. The USGS continuous station was discontinued 10/01/94. Since Water Year 1995, the continuous station has been operated by FCDMC and the crest stage gage by the USGS. ** See also USGS crest stage gage, 09519760, data for this site. Flood Flow Frequency (based on HECWRC implementation of Bulletin 17B, n = 25, station skew used based on examination of observed data plots) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval Surface Water Streamflow Data Page 93 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow 2-year 530 5-year 1,640 10-year 2,610 20-year 3,640 50-year 5,020 100-year 6,040 Station Number: 6983 Name: Vekol Wash 2 Drainage Area: 150 mi Period of Record: USGS ID# 09488650 -- 1990-1996; USGS continuous station discontinued Sept. 1996; FCDMC -- continuous station 03/07/90 to current year* Discharge, in cfs, Water Year October 1996 to September 1997 Peak flows of interest during Water Year 1997:* Day Peak Discharge (cfs) Peak Discharge (cfs) Day Oct. 14 147 Aug. 17 165 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------6 1 14 18 17 12 -----------------------------------------------------------------------------TOTAL 18 0 0 0 0 0 0 0 0 0 14 1 MEAN 1 0 0 0 0 0 0 0 0 0 0 0 MAX 147 0 0 0 0 0 0 0 0 0 165 4 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 35 0 0 0 0 0 0 0 0 0 27 2 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 33 MEAN 0 MAX 165 MIN 0 AC_FT 65 * See also USGS crest stage gage, 09488650, Oct. 1996 to current year. Flood Flow Frequency (based on regional equations for Region 13 as shown in USGS WSP 2433) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 2-year 5-year 10-year 25-year 50-year 100-year 1,600 3,660 5,700 9,030 12,000 15,600 Surface Water Streamflow Data Page 94 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 7013 Name: Martinez Creek Drainage Area: 109 mi 2 Period of Record: 11/23/94 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Peak flows of interest during Water Year 1997: Peak Discharge (cfs) Day Peak Discharge (cfs) Day Jan. 26 284 Sept. 26 10,272 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------25 8 26 17 718 -----------------------------------------------------------------------------TOTAL 0 0 0 17 0 0 0 0 0 0 0 726 MEAN 0 0 0 1 0 0 0 0 0 0 0 24 MAX 0 0 0 284 0 0 0 0 0 0 0 10272 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 34 0 0 0 0 0 0 0 1441 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 744 MEAN 2 MAX 10272 MIN 0 AC_FT 1475 Flood of September 26, 1997 on Martinez Creek 15 Minute Maximum Discharges 12000 Discharge (cfs) 10000 8000 6000 4000 2000 0 0:00 2:00 4:00 6:00 8:00 Time on Sept. 26, 1997 10:00 12:00 14:00 Note: Flows below 3,000 cfs are considered approximate at best due to multiple channel configuration of Martinez Creek in this area. Even above 3,000 cfs the rating is stll considered poor due to the expanding downstream reach, mobile bed conditions, and the angle of attack of flow at the gage. Flood Flow Frequency (based on R. W. Cruff analysis, 1995 combining FEMA, 1994 and Box Canyon relation shape) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 2-year 5-year 10-year 25-year 50-year 100-year 1,520 5,000 9,220 18,000 27,400 32,000 Surface Water Streamflow Data Page 95 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 7043 Name: Sols Wsh nr Matthie Drainage Area: 121 mi 2 Period of Record: 08/04/95 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Peak flows of interest during Water Year 1997: Day Peak Discharge (cfs) Peak Discharge (cfs) Day Aug. 29 52 Sept. 26 7,978 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------25 18 26 1108 27 1 29 19 30 3 -----------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 22 1127 MEAN 0 0 0 0 0 0 0 0 0 0 1 38 MAX 0 0 0 0 0 0 0 0 0 0 52 7978 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 44 2236 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 1150 MEAN 3 MAX 7978 MIN 0 AC_FT 2280 Discharge (cfs) Flood of September 26, 1997 on Sols Wash near Matthie 15 Minute Maximum Discharges 9000 8000 7000 6000 5000 4000 3000 2000 1000 0 0:00 2:00 4:00 6:00 8:00 10:00 Time on Sept. 26, 1997 12:00 14:00 16:00 Flood Flow Frequency (FEMA 9/95) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 10-year 50-year 100-year 4,800 9,800 12,250 Surface Water Streamflow Data Page 96 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 7063 Name: Hartman Wash Drainage Area: 5.4 mi 2 Period of Record: 07/06/94 to current year Revised Records: WY1996: WY1995 Discharge, in cfs, Water Year October 1996 to September 1997 Peak flows of interest during Water Year 1997: Peak Discharge (cfs) Day Sept. 26 1,253 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------11 2 25 26 1 67 -----------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 69 MEAN 0 0 0 0 0 0 0 0 0 0 0 2 MAX 0 0 0 0 0 0 0 0 0 0 0 1253 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 0 138 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 69 MEAN 0 MAX 1253 MIN 0 AC_FT 138 Flood of September 26, 1997 on Hartman Wash 15 Minute Maximum Discharges 1400 Discharge (cfs) 1200 1000 800 600 400 200 0 0:00 2:00 4:00 6:00 8:00 10:00 Time on Sept. 26, 1997 See also USGS crest stage gage, 09515800, data at this location. Period of record for USGS crest gage: Water Years 1964-1979 and 1992 to current year. Flood Flow Frequency (based on HECWRC implementation of Bulletin 17B, n = 24, station skew used based on examination of observed data plots ) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval Surface Water Streamflow Data Page 97 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow 2-year 200 5-year 1,020 10-year 1,890 20-year 2,840 50-year 4,110 100-year 4,990 Station Number: 7083 Name: Flying E Wash 2 2 Drainage Area: 8.5 mi (4 mi partially controlled by 3 stock tanks) Period of Record: 07/12/94 to present year Revised Records: WY1996: WY1994-95 Discharge, in cfs, Water Year October 1996 to September 1997 Peak flows of interest during Water Year 1997: Day Peak Discharge (cfs) Peak Discharge (cfs) Day Aug. 30 Sept. 11 260 37 Sept. 6 Sept. 26 92 1,145 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------5 1 6 6 11 1 25 26 14 39 29 2 30 7 -----------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 7 62 MEAN 0 0 0 0 0 0 0 0 0 0 0 2 MAX 0 0 0 0 0 0 0 0 0 0 260 1145 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 15 124 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 70 MEAN 0 MAX 1145 MIN 0 AC_FT 138 Flood of September 26, 1997 on Flying E Wash 15 Minute Maximum Discharges 1200 Discharge (cfs) 1000 800 600 400 200 0 0:00 2:00 4:00 6:00 8:00 10:00 12:00 14:00 16:00 Time on Sept. 26, 1997 Flood Flow Frequency (based on Wickenburg ADMS HEC-1 and R. W. Cruff, 1995 graphical extension) Magnitude and Probability of Instantaneous Peak Flow Surface Water Streamflow Data Page 98 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow 2-year 890 Discharge, in cfs, for Indicated Recurrence Interval 5-year 10-year 25-year 50-year 2,200 3,490 4,770 5,860 100-year 6,940 Station Number: 7093 Name: Casandro Wash 2 Drainage Area: 0.61 mi Period of Record: 07/12/94 to current year Discharge, in cfs, Water Year October 1996 to September 1997 No flow except on following days during Water Year 1997: Day Peak Discharge (cfs) Peak Discharge (cfs) Day Sept. 6 19 Sept. 26 177* Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------6 3 26 13 -----------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 17 MEAN 0 0 0 0 0 0 0 0 0 0 0 1 MAX 0 0 0 0 0 0 0 0 0 0 0 177* 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 33 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 17 MEAN 0 MAX 177* MIN 0 AC_FT 33 * Estimated from high water marks at the gage. 2-year 5 Flood Flow Frequency (based on FEMA, 9/95 and R. W. Cruff, 1995 graphical extension ) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 5-year 10-year 25-year 50-year 100-year 20 50 200 500 800 Surface Water Streamflow Data Page 99 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 7113 Name: Powder House Wash Drainage Area: 1.8 mi 2 Period of Record: 05/18/95 to current year Discharge, in cfs, Water Year October 1996 to September 1997 No flow except on following day during Water Year 1997: Peak Discharge (cfs) Day Sept. 26 387* Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------26 42 -----------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 42 MEAN 0 0 0 0 0 0 0 0 0 0 0 1 MAX 0 0 0 0 0 0 0 0 0 0 0 387 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 84 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 42 MEAN 0 MAX 387 MIN 0 AC_FT 84 * Estimated from high water marks at gage. Flood of September 26, 1997 on Powder House Wash 15 Minute Maximum Discharges Discharge (cfs) 400 300 200 100 0 0:00 2:00 4:00 6:00 8:00 10:00 12:00 14:00 16:00 Time on Sept. 26, 1997 10-year 300 Flood Flow Frequency (FEMA, 9/95) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 50-year 100-year 1,300 1,900 Surface Water Streamflow Data Page 100 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: 7133 Name: Casandro Dam Drainage Area: 1.3 mi 2 Period of Record: 08/15/96 to current year Discharge, in cfs, Water Year October 1996 to September 1997 Day Sept. 26 Peak outflow occurred on the following day during Water Year 1997: Peak Discharge (cfs) 19 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 14 27 3 28 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 0 18 MEAN 0 0 0 0 0 0 0 0 0 0 0 1 MAX 0 0 0 0 0 0 0 0 0 0 0 19 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 35 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 18 MEAN 0 MAX 19 MIN 0 AC_FT 35 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 101 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 4563 Name: Spookhill FRS 2 Drainage Area: 13.6 mi Period of Record: Nov. 1987 to current year Depth, in feet, Water Year October 1996 to September 1997 No impoundment during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------MEAN 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 MAX 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 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 1997 MEAN 0.59 MAX 0.59 MIN 0.59 See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 1 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 4648 Name: E.Fork CC #1 2 Drainage Area: 1.18 mi Period of Record: 03/02/94 to current year Depth, in feet, Water Year October 1996 to September 1997 Day Sept. 11 Maximum impoundments of interest during Water Year 1997: Maximum Level (ft) 0.75 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.2 0.8 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 1997 MEAN 0.10 MAX 0.75 MIN 0.10 See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 2 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 4658 Name: E.Fork CC #4 2 Drainage Area: 0.68 mi Period of Record: 01/18/94 to current year Depth, in feet, Water Year October 1996 to September 1997 Day Jan. 13 Aug. 3 Maximum impoundments of interest during Water Year 1997: Maximum Level (ft) Day Maximum Level (ft) 1.38 1.05 Feb. 27 Sept. 11 1.45 2.40 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 0.1 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 0.1 0.0 0.0 0.0 0.0 0.0 3 0.0 0.0 0.0 0.1 0.0 0.0 0.1 0.0 0.0 0.0 0.3 0.0 4 0.0 0.0 0.0 0.1 0.0 0.0 0.1 0.0 0.0 0.0 0.2 0.0 5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.2 0.0 6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 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 0.2 0.0 10 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 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 0.3 12 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 13 0.0 0.0 0.0 0.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 14 0.1 0.0 0.0 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 15 0.0 0.0 0.0 0.1 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 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 28 0.0 0.0 0.0 0.0 0.4 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 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 0.6 0.0 0.0 1.4 1.5 0.0 0.7 0.0 0.0 0.0 1.0 2.4 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 1997 MEAN 0.01 MAX 2.40 MIN 0.00 See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 3 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 4683 Name: E.Fork CC #3 2 2 Drainage Area: 3.52 mi (1.86 mi controlled by EFCC #1 and EFCC #4) Period of Record: 09/13/94 to current year Depth, in feet, Water Year October 1996 to September 1997 Impoundment occurred on following day during Water Year 1997:* Maximum Level (ft) Day Sept. 11 0.45 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.5 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 1997 MEAN 0.15 MAX 0.45 MIN 0.15 * Flows up to about the 2-year are passed beneath the detention basin via storm drains. Also, the 9/11/97 event appears to have been caused by local flow from the area immediate to the gage. See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 4 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 4803 Name: Dreamy Draw Dam Period of Record: Nov. 1987 to current year Revised Records: WY1996: WY1995 Drainage Area: 1.3 mi 2 Depth, in feet, Water Year October 1996 to September 1997 Day Feb. 28 Maximum impoundments of interest during Water Year 1997: Day Maximum Level (ft) Maximum Level (ft) 0.39 Sept. 11 1.66 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 0.1 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 0.1 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 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 0.4 0.0 0.0 0.0 0.0 0.0 0.0 1.7 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 1997 MEAN 0.00 MAX 1.66 MIN 0.00 See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 5 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 4818 Name: 10 St.Wash Basin #1 Period of Record: 11/26/96 to current year Depth, in feet, Water Year October 1996 to September 1997 Day Jan. 13 Apr. 3 Impoundment occurred on following days during Water Year 1997: Maximum Level (ft) Day Maximum Level (ft) 0.50 0.60 Feb. 27 Sept. 11 0.73 1.63 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------MEAN --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 0.5 0.7 0.3 0.6 0.3 0.3 0.3 0.3 1.6 MIN --0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 -----------------------------------------------------------------------------WTR YR 1997 MEAN 0.30 MAX 1.63 MIN 0.30 Note: Gage installed 11/26/96. Pool Level Data Page 6 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 4904 Name: Cave Buttes Dam Period of Record: Nov. 1987 to current year Drainage Area: 191 mi 2 Depth, in feet, Water Year October 1996 to September 1997 Day Jan. 14 Maximum impoundments of interest during Water Year 1997: Maximum Level (ft) Day Maximum Level (ft) 9.22 Feb. 28 9.41 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 4.2 2.0 2.0 1.9 1.9 1.9 1.9 2 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.9 1.9 1.9 1.9 3 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.9 1.9 1.9 1.9 4 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.9 1.9 1.9 1.9 5 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.9 1.9 1.9 1.9 6 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.9 1.9 1.9 1.9 7 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.9 1.9 1.9 1.9 8 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.9 1.9 1.9 1.9 1.9 9 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.9 1.9 1.9 1.9 1.9 10 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.9 1.9 1.9 1.9 1.9 11 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.9 1.9 1.9 1.9 1.9 12 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.9 1.9 1.9 1.9 2.3 13 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.9 1.9 1.9 1.9 1.9 14 2.0 2.0 2.0 6.4 2.0 2.0 2.0 1.9 1.9 1.9 1.9 1.9 15 2.0 2.0 2.0 2.6 2.0 2.0 2.0 1.9 1.9 1.9 1.9 1.9 16 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.9 1.9 1.9 1.9 1.9 17 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.9 1.9 1.9 1.9 1.9 18 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.9 1.9 1.9 1.9 1.9 19 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.9 1.9 1.9 1.9 1.9 20 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.9 1.9 1.9 1.9 1.9 21 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.9 1.9 1.9 1.9 1.9 22 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.9 1.9 1.9 1.9 1.9 23 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.9 1.9 1.9 1.9 1.9 24 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.9 1.9 1.9 1.9 1.9 25 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.9 1.9 1.9 1.9 1.9 26 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.9 1.9 1.9 1.9 1.9 27 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.9 1.9 1.9 1.9 1.9 28 2.0 2.0 2.0 2.0 6.9 2.0 2.0 1.9 1.9 1.9 1.9 1.9 29 2.0 2.0 2.0 2.0 --2.0 2.0 1.9 1.9 1.9 1.9 1.9 30 2.0 2.0 2.0 2.0 --2.0 2.0 1.9 1.9 1.9 1.9 1.9 31 2.0 --2.0 2.0 --2.0 --1.9 --1.9 1.9 -------------------------------------------------------------------------------MEAN 2.0 2.0 2.0 2.2 2.2 2.1 2.0 1.9 1.9 1.9 1.9 1.9 MAX 2.0 2.0 2.0 9.2 9.4 8.3 2.0 2.0 1.9 1.9 1.9 3.9 MIN 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.9 1.9 1.9 1.9 1.9 -----------------------------------------------------------------------------WTR YR 1997 MEAN 1.99 MAX 9.41 MIN 1.90 Note: Instrument lowered to 1.90 ft from 1.99 ft on 05/08/1997. See also Storage Volume Data. Pool Level Data Page 7 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 4938 Name: Reata Pass Dam Period of Record: 02/25/93 to current year Depth, in feet, Water Year October 1996 to September 1997 No significant impoundment during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 0.1 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 1997 MEAN 0.00 MAX 0.05 MIN 0.00 Pool Level Data Page 8 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 5113 Name: Saddleback FRS Period of Record: 12/16/88 to current year Drainage Area: 29.6 mi 2 excluding area brought in from Harquahala FRS Depth, in feet, Water Year October 1996 to September 1997 Day Aug. 8 Maximum impoundments of interest during Water Year 1997: Maximum Level (ft) Day Maximum Level (ft) 1.48 Sept. 25 1.00 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1.5 1.0 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 1997 MEAN 0.30 MAX 1.48 MIN 0.30 See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 9 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 5128 Name: Harquahala FRS Period of Record: 03/01/94 to current year Drainage Area: 102.3 mi 2 Depth, in feet, Water Year October 1996 to September 1997 Day Aug. 8 Maximum impoundments of interest during Water Year 1997: Maximum Level (ft) Day Maximum Level (ft) 18.35 Sept. 25 6.24 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.5 0.4 0.4 0.4 0.4 0.4 0.4 ----0.4 0.4 2.6 2 0.4 0.4 0.4 0.4 0.4 0.4 0.4 ----0.4 0.4 2.5 3 0.4 0.4 0.4 0.4 0.4 0.4 0.4 ----0.4 0.4 2.4 4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 ----0.4 0.4 2.2 5 0.4 0.4 0.4 0.4 0.4 0.4 0.4 ----0.4 0.4 2.2 6 0.4 0.4 0.4 0.4 0.4 0.4 0.4 ----0.4 0.4 2.1 7 0.4 0.4 0.4 0.4 0.4 0.4 0.4 ----0.4 0.4 2.0 8 0.4 0.4 0.4 0.4 0.4 0.4 0.4 ----0.4 1.8 1.9 9 0.4 0.4 0.4 0.4 0.4 0.4 0.4 ----0.4 14.6 1.9 10 0.4 0.4 0.4 0.4 0.4 0.4 0.4 ----0.4 13.3 1.8 11 0.4 0.4 0.4 0.4 0.4 0.4 0.4 ----0.4 12.2 1.6 12 0.4 0.4 0.4 0.4 0.4 0.4 0.4 ----0.4 11.3 1.7 13 0.4 0.4 0.4 0.4 0.4 0.4 0.4 ----0.4 10.3 1.5 14 0.4 0.4 0.4 0.4 0.4 0.4 0.4 ----0.4 9.2 1.5 15 0.4 0.4 0.4 0.4 0.4 0.4 0.4 ----0.4 8.2 1.4 16 0.4 0.4 0.4 0.4 0.4 0.4 0.4 ----0.4 7.3 1.3 17 0.4 0.4 0.4 0.4 0.4 0.4 0.4 ----0.4 6.5 1.2 18 0.4 0.4 0.4 0.4 0.4 0.4 0.4 ----0.4 5.8 1.0 19 0.4 0.4 0.4 0.4 0.4 0.4 0.4 --0.4 0.4 5.3 0.6 20 0.4 0.4 0.4 0.4 0.4 0.4 0.4 --0.4 0.4 4.8 0.4 21 0.4 0.4 0.4 0.4 0.4 0.4 0.4 --0.4 0.4 4.6 0.4 22 0.4 0.4 0.4 0.4 0.4 0.4 0.4 --0.4 0.4 4.3 0.4 23 0.4 0.4 0.4 0.4 0.4 0.4 ----0.4 0.4 4.0 0.4 24 0.4 0.4 0.4 0.4 0.4 0.4 ----0.4 0.4 3.7 0.4 25 0.4 0.4 0.4 0.4 0.4 0.4 ----0.4 0.4 3.5 1.9 26 0.4 0.4 0.4 0.4 0.4 0.4 ----0.4 0.4 3.3 5.0 27 0.4 0.4 0.4 0.4 0.4 0.4 ----0.4 0.4 3.2 3.8 28 0.4 0.4 0.4 0.4 0.4 0.4 ----0.4 0.4 3.0 3.1 29 0.4 0.4 0.4 0.4 --0.4 ----0.4 0.4 2.8 2.7 30 0.4 0.4 0.4 0.4 --0.4 ----0.4 0.4 2.7 2.3 31 0.4 --0.4 0.4 --0.4 ------0.4 2.7 -------------------------------------------------------------------------------MEAN 0.4 0.4 0.4 0.4 0.4 0.4 0.4 --0.4 0.4 4.9 1.8 MAX 0.4 0.4 0.4 0.4 0.4 0.4 0.4 --0.4 0.4 18.3 6.2 MIN 0.4 0.4 0.4 0.4 0.4 0.4 0.4 --0.4 0.4 0.4 0.4 -----------------------------------------------------------------------------WTR YR 1997 MEAN 0.88 MAX 18.35 MIN 0.38 Gage out of service 04/23/97 to 06/18/97 due to instrument failure. No impoundments missed. See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 10 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 5203 Name: Buckeye FRS #1 Period of Record: Nov. 1987 to current year Drainage Area: 74 mi2 without area from Buckeye FRS #2 and #3 Depth, in feet, Water Year October 1996 to September 1997 Day Aug. 8 Sept. 2 Maximum impoundments of interest during Water Year 1997: Maximum Level (ft) Day Maximum Level (ft) 1.31 -1.01 Aug. 17 Sept. 11 0.41 -1.79 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------MEAN -2.5 -2.5 -2.5 -2.5 -2.5 -2.5 -2.5 -2.5 -2.5 -2.5 -2.3 -2.4 MAX -2.5 -2.5 -2.5 -2.5 -2.5 -2.5 -2.5 -2.5 -2.5 -2.5 1.3 -1.0 MIN -2.5 -2.5 -2.5 -2.5 -2.5 -2.5 -2.5 -2.5 -2.5 -2.5 -2.5 -2.5 -----------------------------------------------------------------------------WTR YR 1997 MEAN -2.47 MAX 1.31 MIN -2.49 Note: Instrument 2.48 ft below gage datum at invert elevation of principle outlet which is located in a depressed drop box type inlet structure. Gage datum of 0.0 feet is taken to be the point at the top of the drop box which is level with the ground around the inlet structure. See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 11 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 5208 Name: Buckeye FRS #2 Period of Record: 11/11/92 to current year Drainage Area: 5.7 mi 2 without area from Buckeye FRS #3 Depth, in feet, Water Year October 1996 to September 1997 Day Aug. 8 Maximum impoundments of interest during Water Year 1997: Maximum Level (ft) Day Maximum Level (ft) 0.26 Aug. 30 0.29 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 0.3 -1.1 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 1997 MEAN -1.39 MAX 0.29 MIN -1.39 Note: Instrument 1.39 ft below gage datum at invert elevation of principle outlet which is located in a depressed drop box type inlet structure. Gage datum of 0.0 feet is taken to be the point at the top of the drop box which is level with the ground around the inlet structure. See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 12 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 5233 Name: Sunset FRS Period of Record: 02/12/89 to current year Drainage Area: 0.95 mi 2 (from Wickenburg ADMS) Depth, in feet, Water Year October 1996 to September 1997 Day Feb. 28 Sept. 5 Maximum impoundments of interest during Water Year 1997: Maximum Level (ft) Day Maximum Level (ft) 2.67 4.25 Aug. 9 Sept. 26 2.67 12.27 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 2.4 0.7 0.7 0.7 0.7 0.7 0.7 2 0.7 0.7 0.7 0.7 0.7 2.1 0.7 0.7 0.7 0.7 0.7 0.7 3 0.7 0.7 0.7 0.7 0.7 1.9 1.3 0.7 0.7 0.7 0.7 0.7 4 0.7 0.7 0.7 0.7 0.7 1.7 1.6 0.7 0.7 0.7 0.7 0.7 5 0.7 0.7 0.7 0.7 0.7 1.5 1.4 0.7 0.7 0.7 1.3 1.1 6 0.7 0.7 0.7 0.7 0.7 1.3 1.1 0.7 0.7 0.7 2.0 3.9 7 0.7 0.7 0.7 0.7 0.7 1.1 0.8 0.7 0.7 0.7 1.7 3.5 8 0.7 0.7 0.7 0.7 0.7 0.8 0.7 0.7 0.7 0.7 1.6 3.2 9 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 2.5 2.9 10 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 2.1 2.6 11 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 1.8 2.6 12 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 1.6 2.4 13 0.7 0.7 0.7 1.9 0.7 0.7 0.7 0.7 0.7 0.7 1.5 2.2 14 0.7 0.7 0.7 2.0 0.7 0.7 0.7 0.7 0.7 0.7 1.3 1.9 15 0.7 0.7 0.7 1.7 0.7 0.7 0.7 0.7 0.7 0.7 1.1 1.6 16 0.7 0.7 0.7 1.5 0.7 0.7 0.7 0.7 0.7 0.7 0.8 0.7 17 0.7 0.7 0.7 1.3 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 18 0.7 0.7 0.7 0.9 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 1.4 24 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 1.3 25 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 2.1 26 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 10.2 27 0.7 0.7 0.7 0.7 1.4 0.7 0.7 0.7 0.7 0.7 0.7 9.3 28 0.7 0.7 0.7 0.7 2.6 0.7 0.7 0.7 0.7 0.7 0.7 8.4 29 0.7 0.7 0.7 0.7 --0.7 0.7 0.7 0.7 0.7 0.7 7.8 30 0.7 0.7 0.7 0.7 --0.7 0.7 0.7 0.7 0.7 0.7 7.0 31 0.7 --0.7 0.7 --0.7 --0.7 --0.7 0.7 -------------------------------------------------------------------------------MEAN 0.7 0.7 0.7 0.9 0.8 0.9 0.8 0.7 0.7 0.7 1.1 2.8 MAX 0.7 0.7 0.7 2.1 2.7 2.4 1.6 0.7 0.7 0.7 2.7 12.3 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 1997 MEAN 0.95 MAX 12.27 MIN 0.70 See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 13 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 5248 Name: Sunnycove FRS Period of Record: Nov. 1987 to current year Drainage Area: 0.98 mi 2 (from Wickenburg ADMS) Depth, in feet, Water Year October 1996 to September 1997 Maximum impoundments of interest during Water Year 1997: Maximum Level (ft) Day Sept. 26 17.19* 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 0.2 6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.0 7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.5 8 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 9 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.3 10 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.3 11 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.2 12 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.2 13 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 14 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 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 0.6 26 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 14.0 27 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 4.1 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 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 0.7 MAX 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 17.2 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 1997 MEAN 0.06 MAX 17.19 MIN 0.00 * Maximum from high water marks. Due to instrument failure during the 9/26/97 event, mean values for 9/25-27/97 and for the month of September are estimates. Pool Level Data Page 14 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 15 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 5418 Name: White Tanks #3 FRS Period of Record: Nov. 1987 to current year Drainage Area: 20.5 mi 2 (White Tanks ADMS) Depth, in feet, Water Year October 1996 to September 1997 No impoundment above gage during Water Year 1997.* OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 MEAN 0.00 MAX 0.0 MIN 0.0 * Significant storage volume exists below the instrument level due to the borrow pits behind the dam. The storage volume behind the dam at the instrument level is 124 acre-feet (revised from 74 acre-feet prior to WY 1997). See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 16 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 5448 Name: McMicken Dam Period of Record: Nov. 1987 to current year Drainage Area: 247 mi 2 Depth, in feet, Water Year October 1996 to September 1997 No significant impoundment during Water Year 1997. * OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 MEAN 0.00 MAX 0.0 MIN 0.0 * Significant storage volume exists below the instrument level due to the borrow pits behind the dam. The storage volume behind the dam at the instrument level is 96 acre-feet. See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 17 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 5539 Name: Adobe Dam 2 Drainage Area: 89.6 mi Period of Record: Nov. 1987 to present Depth, in feet, Water Year October 1996 to September 1997 Maximum impoundments of interest on following days during Water Year 1997: Maximum Level (ft) Day Maximum Level (ft) Day Jan. 14 1.37 Sept. 12 1.37 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 0.1 0.1 1.4 0.1 0.1 0.1 0.1 0.1 0.1 0.1 1.4 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 1997 MEAN 0.10 MAX 1.37 MIN 0.10 See also Surface Water Streamflow and Storage Volume Data. 2-year 12.8 Pool Level Data Page 18 Flood Elevation Frequency Magnitude and Probability of Elevation of Impoundment Elevation, in gage height (ft), for Indicated Recurrence Interval 5-year 10-year 25-year 50-year 18.5 23.3 28.3 31.3 100-year 34.5 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 5614 Name: New River Dam 2 Drainage Area: 164 mi Period of Record: Nov. 1987 to current year Depth, in feet, Water Year October 1996 to September 1997 No impoundment during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 2.9 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 1997 MEAN 2.88 MAX 2.88 MIN 2.88 See also Surface Water Streamflow and Storage Volume Data. 2-year 7.4 Pool Level Data Page 19 Flood Elevation Frequency Magnitude and Probability of Elevation of Impoundment Elevation, in gage height (ft), for Indicated Recurrence Interval 5-year 10-year 25-year 50-year 12.4 31 40 46.9 100-year 53.9 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 5968 Name: StoneRidge Dam 2 Drainage Area: 0.86 mi Period of Record: 12/11/96 to current year Depth, in feet, Water Year October 1996 to September 1997 Day Aug. 26 Maximum impoundments of interest during Water Year 1997: Maximum Level (ft) Day Maximum Level (ft) 1.09 Sept. 11 1.01 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------MEAN ----0.9 0.9 0.9 0.8 0.8 0.8 0.8 0.8 0.8 0.8 MAX ----0.9 0.9 0.9 0.9 0.9 0.8 0.8 0.8 1.1 1.0 MIN ----0.9 0.9 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 -----------------------------------------------------------------------------WTR YR 1997 MEAN 0.83 MAX 1.09 MIN 0.75 Note: Gage installed on 12/11/1996. Pool Level Data Page 20 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 5973 Name: SunRidge Canyon Dam 2 Drainage Area: 1.6 mi Period of Record: 02/04/97 to current year Depth, in feet, Water Year October 1996 to September 1997 No impoundments during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------MEAN --------1.4 1.4 1.4 1.3 1.3 1.3 1.3 1.3 MAX --------1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 MIN --------1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 -----------------------------------------------------------------------------WTR YR 1997 MEAN 1.35 MAX 1.38 MIN 1.30 Note: Gage installed on 02/04/1997. Pool Level Data Page 21 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 5978 Name: GoldenEaglePark Dam 2 2 Drainage Area: 7.13 mi of which 2.02 mi , 2.13 mi 2, and 1.6 mi 2 are controlled by Aspen, North Heights, and Sunridge Canyon Dams respectively Period of Record: 12/12/96 to current year Depth, in feet, Water Year October 1996 to September 1997 Day Jan. 13 Sept. 11 Maximum impoundments of interest during Water Year 1997: Day Maximum Level (ft) Maximum Level (ft) 1.02 1.60 Aug. 26 1.22 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------MEAN ----0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 MAX ----0.2 1.0 0.8 0.2 0.2 0.2 0.2 0.2 1.2 1.6 MIN ----0.2 0.2 0.2 0.1 0.2 0.2 0.1 0.1 0.1 0.1 -----------------------------------------------------------------------------WTR YR 1997 MEAN 0.19 MAX 1.60 MIN 0.10 Note: Gage installed on 12/12/1996. Pool Level Data Page 22 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 5983 Name: North Heights Dam 2 Drainage Area: 2.13 mi Period of Record: 10/11/96 to current year Depth, in feet, Water Year October 1996 to September 1997 Day Feb. 27 Maximum impoundments of interest during Water Year 1997: Maximum Level (ft) Day Maximum Level (ft) 0.89 Sept. 11 1.11 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 0.5 0.9 0.3 0.3 0.3 0.3 0.3 0.4 1.1 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 1997 MEAN 0.31 MAX 1.11 MIN 0.27 Note: Gage installed on 10/11/1996. Pool Level Data Page 23 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 5988 Name: Aspen Dam 2 Drainage Area: 2.02 mi Period of Record: 01/02/97 to current year Depth, in feet, Water Year October 1996 to September 1997 Day Sept. 11 Maximum impoundments of interest during Water Year 1997: Maximum Level (ft) 0.98 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------MEAN ------0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 MAX ------0.6 0.6 0.3 0.3 0.2 0.2 0.2 0.2 1.0 MIN ------0.2 0.2 0.2 0.2 0.2 0.1 0.1 0.1 0.1 -----------------------------------------------------------------------------WTR YR 1997 MEAN 0.22 MAX 0.98 MIN 0.14 Note: Gage installed on 01/02/1997. Pool Level Data Page 24 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 5993 Name: Hesperus Dam 2 Drainage Area: 2.91 mi Period of Record: 12/18/96 to current year Depth, in feet, Water Year October 1996 to September 1997 No significant impoundment during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------MEAN ----1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 MAX ----1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 MIN ----1.0 1.0 1.0 1.0 1.0 1.0 1.0 0.9 1.0 0.9 -----------------------------------------------------------------------------WTR YR 1997 MEAN 1.01 MAX 1.05 MIN 0.95 Note: Gage installed on 12/18/1996. Pool Level Data Page 25 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 6503 Name: Guadalupe FRS 2 Drainage Area: 1.87 mi Period of Record: 06/29/89 to current year Depth, in feet, Water Year October 1996 to September 1997 No impoundment during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 MEAN 0.00 MAX 0.0 MIN 0.0 See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 26 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 6608 Name: Freestone Basin 2 Drainage Area: 4.26 mi (area downstream of Eastern Canal only, does not include area from overflows of Eastern Canal) Period of Record: 12/19/96 to current year Depth, in feet, Water Year October 1996 to September 1997 Day Jan. 13 Aug. 3 Aug. 31 Rainfall produced impoundments of interest during Water Year 1997: Maximum Level (ft) Day Maximum Level (ft) 5.63 6.20 5.40 Feb. 28 Aug. 9 5.82 5.15 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 3.1 1.8 4.3 3.8 3.4 5.8 2.7 2.5 3.9 1.9 2.4 5.4 2 3.7 2.9 1.8 3.8 3.5 5.7 4.2 3.4 3.6 2.8 3.5 3.7 3 4.4 3.3 2.8 2.3 1.9 4.9 4.8 4.0 3.4 3.2 5.3 3.6 4 4.7 3.7 3.3 1.1 2.7 2.1 3.0 4.0 3.3 4.1 3.6 3.7 5 4.7 2.4 3.5 2.8 3.3 3.1 0.2 4.1 3.2 4.1 2.1 2.6 6 4.7 1.6 3.7 3.0 3.6 3.3 2.6 5.7 3.6 4.0 3.4 3.7 7 4.7 1.5 3.9 1.5 1.9 1.3 2.6 6.5 3.7 1.8 3.7 2.4 8 4.7 1.4 4.0 1.0 2.9 2.1 2.5 6.4 4.1 3.0 4.1 4.2 9 4.7 0.1 4.1 3.1 3.3 3.0 2.6 6.1 4.2 3.4 5.1 4.1 10 4.6 1.5 2.4 3.2 4.2 3.0 2.5 5.8 4.6 3.9 5.1 4.0 11 2.7 3.1 2.7 3.2 4.3 3.2 0.9 5.5 4.6 3.4 2.4 4.2 12 2.9 1.7 3.3 3.2 2.5 3.3 0.2 5.1 4.5 3.4 3.2 4.3 13 3.4 3.0 1.6 4.8 3.8 1.8 0.7 4.8 4.3 4.4 3.7 4.3 14 3.7 3.4 2.4 5.5 2.3 2.5 2.7 4.8 4.2 4.5 4.0 4.5 15 2.8 2.0 3.2 5.5 2.6 3.1 2.7 4.5 3.9 2.7 2.5 2.6 16 2.9 2.9 3.4 3.8 3.0 3.2 1.0 4.2 3.6 3.4 3.9 3.3 17 3.4 3.3 3.7 0.1 2.2 3.1 2.6 4.0 3.5 1.4 4.1 3.2 18 3.6 3.6 3.8 0.1 2.8 3.2 2.9 3.7 3.6 1.7 3.2 4.5 19 3.9 3.8 3.9 0.1 1.6 3.2 3.0 3.5 4.8 4.6 3.7 1.5 20 3.9 2.5 4.0 0.1 2.7 4.1 3.0 3.2 5.0 4.9 4.2 2.5 21 2.5 0.1 4.0 1.7 1.8 1.5 3.1 3.1 4.8 3.4 3.2 3.1 22 3.1 1.6 4.1 3.4 2.8 0.1 1.3 3.1 4.6 3.8 3.6 1.9 23 3.6 4.2 4.1 4.1 3.1 0.2 0.2 3.1 4.8 4.1 4.4 3.3 24 3.8 4.2 2.3 2.3 2.1 1.0 1.8 3.4 4.5 2.6 4.9 3.5 25 3.9 4.5 0.8 0.1 2.9 0.9 2.4 4.2 4.1 3.5 3.6 3.6 26 4.0 2.1 0.5 2.3 4.3 2.3 2.0 4.8 3.7 3.9 3.8 2.7 27 2.4 2.9 0.3 3.2 3.7 2.0 1.0 4.9 3.9 4.1 2.9 3.2 28 2.5 3.6 0.7 4.1 5.5 2.2 1.6 4.8 4.9 3.3 3.2 3.3 29 1.5 4.0 1.9 1.7 --1.6 2.2 4.9 4.8 3.7 3.9 3.4 30 3.0 4.2 3.0 2.9 --0.8 2.0 4.7 4.5 2.7 4.2 3.8 31 3.4 --3.7 3.2 --0.5 --4.4 --3.1 5.3 -------------------------------------------------------------------------------MEAN 3.6 2.7 2.9 2.6 3.0 2.5 2.2 4.4 4.1 3.4 3.8 3.5 MAX 4.7 4.5 4.7 6.3 6.3 5.8 5.7 6.6 5.1 5.2 6.3 5.4 MIN 0.1 -0.3 -0.1 0.1 0.1 0.1 0.1 2.3 3.2 0.2 0.2 0.2 -----------------------------------------------------------------------------WTR YR 1997 MEAN 3.23 MAX 6.57 MIN -0.28 Note: Many days of impoundment due to irrigation tailwater. See also Storage Volume Data. Pool Level Data Page 27 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 6623 Name: Crossroads Park 2 Drainage Area: 15.7 mi (area downstream of US 60 only, does not include area from Eastern Canal tailwater ditch under US 60) Period of Record: 12/18/96 to current year Depth, in feet, Water Year October 1996 to September 1997 No significant impoundment during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1.3 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 1997 MEAN 1.33 MAX 1.3 MIN 1.3 See also Storage Volume Data. Pool Level Data Page 28 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 6628 Name: Signal Butte FRS 2 Drainage Area: 16.4 mi not including area from Apache Junction FRS Period of Record: 11/10/87 to current year Depth, in feet, Water Year October 1996 to September 1997 Day Jan. 14 Maximum impoundments of interest during Water Year 1997: Maximum Level (ft) Day Maximum Level (ft) 3.00 Aug. 10 5.60 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 -0.2 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.0 2 -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 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 -0.2 -0.3 9 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.1 -0.3 10 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 4.0 -0.3 11 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 4.3 -0.3 12 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 3.5 -0.3 13 -0.3 -0.3 -0.3 0.7 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 3.3 -0.3 14 -0.3 -0.3 -0.3 2.2 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 2.8 -0.3 15 -0.3 -0.3 -0.3 2.1 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 2.6 -0.3 16 -0.3 -0.3 -0.3 1.7 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 2.3 -0.3 17 -0.3 -0.3 -0.3 1.5 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 2.1 -0.3 18 -0.3 -0.3 -0.3 1.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 1.9 -0.3 19 -0.3 -0.3 -0.3 1.1 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 1.8 -0.3 20 -0.3 -0.3 -0.3 0.9 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 1.6 -0.3 21 -0.3 -0.3 -0.3 0.9 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 1.5 -0.3 22 -0.3 -0.3 -0.3 0.7 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 1.3 -0.3 23 -0.3 -0.3 -0.3 0.6 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 1.2 -0.3 24 -0.3 -0.3 -0.3 0.5 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 1.1 -0.3 25 -0.3 -0.3 -0.3 0.4 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 1.0 -0.3 26 -0.3 -0.3 -0.3 0.4 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 0.9 -0.3 27 -0.3 -0.3 -0.3 0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 0.7 -0.3 28 -0.3 -0.3 -0.3 0.2 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 0.6 -0.3 29 -0.3 -0.3 -0.3 0.0 --- -0.3 -0.3 -0.3 -0.3 -0.3 0.4 -0.3 30 -0.3 -0.3 -0.3 -0.1 --- -0.3 -0.3 -0.3 -0.3 -0.3 0.3 -0.3 31 -0.3 --- -0.3 -0.2 --- -0.3 --- -0.3 --- -0.3 0.1 -------------------------------------------------------------------------------MEAN -0.2 -0.3 -0.3 0.4 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 1.2 -0.2 MAX -0.3 -0.3 -0.3 3.0 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 5.6 -0.0 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 1997 MEAN -0.07 MAX 5.60 MIN -0.25 See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 29 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 6673 Name: Apache Jct. FRS 2 Drainage Area: 5.8 mi Period of Record: Nov. 1987 to present Depth, in feet, Water Year October 1996 to September 1997 Day Jan. 13 Maximum impoundments of interest during Water Year 1997: Maximum Level (ft) 1.23 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 0.1 0.1 1.2 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 1997 MEAN 0.13 MAX 1.23 MIN 0.13 See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 30 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 6683 Name: Powerline FRS 2 Drainage Area: 49.9 mi Period of Record: 12/03/92 to current year Depth, in feet, Water Year October 1996 to September 1997 Day Nov. 23 Feb. 28 Maximum impoundments of interest during Water Year 1997: Maximum Level (ft) Day Maximum Level (ft) 0.40 0.43 Jan. 13 0.50 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 0.4 0.2 0.5 0.4 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 1997 MEAN 0.20 MAX 0.50 MIN 0.20 See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 31 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 6688 Name: Vineyard FRS 2 Drainage Area: 57.8 mi Period of Record: Nov. 1987 to current year Depth, in feet, Water Year October 1996 to September 1997 Day Jan. 13 Maximum impoundments of interest during Water Year 1997: Maximum Level (ft) 0.80 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 0.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 14 0.0 0.0 0.0 0.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 15 0.0 0.0 0.0 0.2 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 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 0.8 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 1997 MEAN 0.00 MAX 0.80 MIN 0.00 See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 32 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 6703 Name: Rittenhouse FRS 2 Drainage Area: 51.3 mi Period of Record: 09/27/88 to current year Depth, in feet, Water Year October 1996 to September 1997 Day Aug. 8 Maximum impoundments of interest during Water Year 1997: Maximum Level (ft) Day Maximum Level (ft) 2.67 Aug. 31 3.22 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.1 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 0.4 0.2 3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.5 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 1.0 0.2 9 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.9 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 0.5 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 0.2 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 1.6 -------------------------------------------------------------------------------MEAN 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.3 0.2 MAX 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 3.2 0.4 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 1997 MEAN 0.21 MAX 3.22 MIN 0.20 See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 33 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 6813 Name: Buckeye FRS #3 2 Drainage Area: 9.3 mi Period of Record: 11/23/92 to current year Depth, in feet, Water Year October 1996 to September 1997 Day Aug. 8 Maximum impoundments of interest during Water Year 1997: Maximum Level (ft) Day Maximum Level (ft) -3.55 Sept. 1 -3.23 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 -4.1 -3.6 -3.2 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 1997 MEAN -4.08 MAX -3.23 MIN -4.08 Note: Instrument 4.08 ft below gage datum at invert elevation of principle outlet which is located in a depressed drop box type inlet structure. Gage datum of 0.0 feet is taken to be the point at the top of the drop box which is level with the ground around the inlet structure. See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 34 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 6823 Name: White Tanks #4 FRS 2 Drainage Area: 18.6 mi (White Tanks ADMS) Period of Record: Nov. 1987 to current year Depth, in feet, Water Year October 1996 to September 1997 No impoundment above gage during Water Year 1997.* OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 MEAN 0.00 MAX 0.0 MIN 0.0 * Significant storage volume exists below the instrument level due to the large borrow pits behind the dam. The storage volume behind the dam at the instrument level is 585 acre-feet. See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 35 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 7133 Name: Casandro Dam 2 Drainage Area: 1.3 mi Period of Record: 08/15/96 to current year Depth, in feet, Water Year October 1996 to September 1997 Day Sept. 26 Maximum impoundments of interest during Water Year 1997: Maximum Level (ft) 11.3 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------MEAN -0.1 -0.1 -0.1 -0.1 -0.1 -0.1 -0.1 -0.1 -0.1 -0.1 -0.1 0.2 MAX -0.1 -0.1 -0.1 -0.1 -0.1 -0.1 -0.1 -0.1 -0.1 -0.1 -0.1 11.3 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 1997 MEAN -0.05 MAX 11.30 MIN -0.08 Note: Instrument located 0.08 ft below outlet invert which is taken as 0.00 ft gage datum. See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 36 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 4562 Name: Spookhill FRS Cap Period of Record: Nov. 1987 to current year Drainage Area: 13.6 mi 2 Volume, in acre feet, Water Year October 1996 to September 1997 No significant storage during Water Year 1997.* OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 MEAN 0 MAX 0 MIN 0 * Storage rating curve begins at 11.5 feet gage height. At 12.0 feet the rating shows 149 ac-ft of storage. See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 1 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 4647 Name: E.Fork CC #1 Cap Drainage Area: 1.18 mi 2 Period of Record: 03/02/94 to current year Volume, in acre feet, Water Year October 1996 to September 1997 Day Sept. 11 No storage during Water Year 1997 except on following day: Maximum Storage (ac-ft) (% full) 1 1.7 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1997 MEAN 0 MAX 1 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 2 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 4657 Name: E.Fork CC #4 Cap Drainage Area: 0.68 mi 2 Period of Record: 01/18/94 to current year Volume, in acre feet, Water Year October 1996 to September 1997 Day Jan. 13 Sept. 11 Maximum impoundments of interest during Water Year 1997: Maximum Storage Maximum Storage (ac-ft) (% full) Day (ac-ft) (% full) 1 2 1.4 2.7 Feb. 28 1 1.4 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 1 1 0 0 0 0 0 0 2 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1997 MEAN 0 MAX 2 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 3 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 4682 Name: E.Fork CC #3 Cap Drainage Area: 3.52 mi 2 (1.86 mi 2 controlled by EFCC #1 and EFCC #4) Period of Record: 09/13/94 to current year Volume, in acre feet, Water Year October 1996 to September 1997 No significant storage during Water Year 1997.* OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 MEAN 0 MAX 0 MIN 0 * Flows up to about the 2-year pass beneath the detention basin via storm drains. See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 4 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 4802 Name: Dreamy Draw Dam Cap Period of Record: Nov. 1987 to current year Revised Records: WY1996: WY1995 Drainage Area: 1.3 mi 2 Volume, in acre-feet, Water Year October 1996 to September 1997 No significant storage during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 MEAN 0 MAX 0 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 5 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 4817 Name: 10 St.Wash #1 Cap Period of Record: 11/26/96 to current year Volume, in acre-feet, Water Year October 1996 to September 1997 Day Sept. 11 Maximum impoundments of interest during Water Year 1997: Maximum Storage (ac-ft) (% full) 0.89 4.1 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------MEAN --0 0 0 0 0 0 0 0 0 0 0 MAX --0 0 0 0 0 0 0 0 0 0 1 MIN --0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1997 MEAN 0 MAX 0.89 MIN 0 Note: Gage installed 11/26/96. Storage Volume Data Page 6 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 4902 Name: Cave Buttes Dam Cap Period of Record: Nov. 1987 to current year Drainage Area: 191 mi 2 Volume, in acre feet, Water Year October 1996 to September 1997 Day Jan. 14 Maximum impoundments of interest during Water Year 1997: Maximum Storage Maximum Storage (ac-ft) (% full) Day (ac-ft) (% full) 129 0.3 Feb. 28 134 0.3 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 30 2 3 4 5 6 7 8 9 10 11 12 3 13 14 69 15 4 16 17 18 19 20 21 22 23 24 25 26 27 28 76 29 30 31 -----------------------------------------------------------------------------MEAN 0 0 0 2 3 1 0 0 0 0 0 0 MAX 0 0 0 129 134 105 0 0 0 0 0 12 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1997 MEAN 0 MAX 134 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 7 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Storage Volume Data Page 8 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 5112 Name: Saddleback FRS Cap Period of Record: 12/16/88 to current year Drainage Area: 29.6 mi 2 excluding area brought in from Harquahala FRS Volume, in acre feet, Water Year October 1996 to September 1997 Day Aug. 8 Maximum impoundments of interest during Water Year 1997: Maximum Storage Maximum Storage Day (ac-ft) (% full) (ac-ft) (% full) 86 1.3 Sept.25 65 1.0 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 8 9 10 10 11 19 12 13 14 15 16 17 6 18 4 19 20 21 22 23 24 25 10 26 27 5 28 5 29 30 2 31 15 -----------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 1 1 MAX 0 0 0 0 0 0 0 0 0 0 86 65 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1997 MEAN 0 MAX 86 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 9 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 5127 Name: Harquahala FRS Cap Period of Record: 03/01/94 to current year Drainage Area: 102.3 mi 2 Volume, in acre feet, Water Year October 1996 to September 1997 Day Aug. 8 Maximum impoundments of interest during Water Year 1997: Maximum Storage Maximum Storage Day (ac-ft) (% full) (ac-ft) (% full) 151* 1.7* Sept. 25 1* <0.1* Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 8 9 35 10 19 11 13 12 9 13 6 14 4 15 3 16 2 17 1 18 1 19 1 20 1 21 22 23 24 25 26 1 27 28 29 30 31 -----------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 --0 0 3 0 MAX 0 0 0 0 0 0 0 --0 0 151 1 MIN 0 0 0 0 0 0 0 --0 0 0 0 -----------------------------------------------------------------------------WTR YR 1997 MEAN 0 MAX 151 MIN 0 Storage Volume Data Page 10 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes * Storage shown assumes level pool behind length of dam. Multiple pools are disconnected below approximately 34 ft gage height = 6,800 ac-ft = 78 % full. See also Surface Water Streamflow and Pool Level Data. Station Number: 5202 Name: Buckeye FRS #1 Cap Period of Record: Nov. 1987 to current year Drainage Area: 74 mi2 without area from Buckeye FRS #2 and #3 Volume, in acre feet, Water Year October 1996 to September 1997 Day Aug. 8 Sept. 2 Maximum impoundments of interest during Water Year 1997: Maximum Storage Maximum Storage Day (ac-ft) (% full) (ac-ft) (% full) 48 6 0.6 <0.1 Aug. 17 Sept. 11 20 3 0.2 <0.1 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 1 2 4 3 2 4 5 6 7 8 4 9 12 10 3 11 1 12 1 1 13 1 14 15 16 17 4 18 5 19 2 20 21 22 23 24 25 26 27 28 29 30 31 -----------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 1 0 Storage Volume Data Page 11 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes MAX 0 0 0 0 0 0 0 0 0 0 48 6 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1997 MEAN 0 MAX 48 MIN 0 Note: Storage volume and percent full statistics assume a connected level pool behind the dam. See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 12 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 5207 Name: Buckeye FRS #2 Cap Period of Record: 11/11/92 to current year Drainage Area: 5.7 mi 2 without area from Buckeye FRS #3 Volume, in acre feet, Water Year October 1996 to September 1997 Day Aug.8 No significant storage exept on following days in Water Year 1997: Maximum Storage Maximum Storage Day (ac-ft) (% full) (ac-ft) (% full) 2 0.2 Aug. 30 2 0.2 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 2 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1997 MEAN 0 MAX 2 MIN 0 Note: Storage volume and percent full statistics assume a connected level pool behind the dam. See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 13 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 5232 Name: Sunset FRS Cap Period of Record: 02/12/89 to current year Drainage Area: 0.95 mi 2 (from Wickenburg ADMS) Volume, in acre feet, Water Year October 1996 to September 1997 Day Feb. 28 Aug. 9 Sept. 26 Maximum impoundments of interest during Water Year 1997: Maximum Storage Maximum Storage (ac-ft) (% full) Day (ac-ft) (% full) 1 1 34 1.2 1.2 39.5 Aug. 5 Sept. 5 1 3 1.2 3.5 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 1 2 1 3 4 5 6 2 7 1 8 1 9 1 1 10 1 1 11 1 12 1 13 1 14 1 15 1 16 1 17 1 18 1 19 1 20 1 21 1 22 1 23 1 24 25 1 26 24 27 18 28 1 14 29 12 30 10 31 -----------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 3 MAX 0 0 0 0 1 1 0 0 0 0 1 34 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1997 MEAN 0 MAX 34 MIN 0 Storage Volume Data Page 14 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 15 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 5247 Name: Sunnycove FRS Cap Period of Record: Nov. 1987 to current year Drainage Area: 0.98 mi 2 (from Wickenburg ADMS) Volume, in acre feet, Water Year October 1996 to September 1997 Maximum storage during Water Year 1997: Maximum Storage (ac-ft) (% full) Day Sept. 26 30* 13.9 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 *30 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1997 MEAN 0 MAX 30* MIN 0 * Maximum for Water Year 1997 from high water marks surveyed on 09/26/97. Due to instrument failure during this impoundment, no mean value is reported for September 1997. See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 16 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 5417 Name: White Tanks #3 Cap Period of Record: Nov. 1987 to current year Drainage Area: 20.5 mi 2 (White Tanks ADMS) Volume, in acre feet, Water Year October 1996 to September 1997 No impoundment above gage during Water Year 1997.* OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 MEAN 0 MAX 0 MIN 0 * Significant storage volume exists below the instrument level due to the borrow pits behind the dam. The storage volume behind the dam at the instrument level is 124 acre-feet (revised from 74 acrefeet during years prior to WY 1997). See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 17 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 5447 Name: McMicken Dam Cap Period of Record: Nov. 1987 to current year Drainage Area: 247 mi 2 Volume, in acre feet, Water Year October 1996 to September 1997 No significant storage during Water Year 1997. * OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 MEAN 0 MAX 0 MIN 0 * Significant storage volume exists below the instrument level due to the borrow pits behind the dam. The storage volume behind the dam at the instrument level is 96 acre-feet. See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 18 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 5537 Name: Adobe Dam Cap Drainage Area: 89.6 mi 2 Period of Record: Nov. 1987 to current year Volume, in acre feet, Water Year October 1996 to September 1997 Day Jan. 14 No storage except on following days during Water Year 1997: Maximum Storage Maximum Storage Day (ac-ft) (% full) (ac-ft) (% full) 2 <0.1 Sept. 12 2 <0.1 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 2 0 0 0 0 0 0 0 2 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1997 MEAN 0 MAX 2 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 19 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 5612 Name: New River Dam Cap Drainage Area: 164 mi 2 Period of Record: Nov. 1987 to current year Volume, in acre feet, Water Year October 1996 to September 1997 No impoundment above gage during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 MEAN 0 MAX 0 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 20 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 5967 Name: StoneRidge Dam Cap Drainage Area: 0.86 mi 2 Period of Record: 12/11/96 to current year Volume, in acre feet, Water Year October 1996 to September 1997 No significant storage since gage installation during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------MEAN ----0 0 0 0 0 0 0 0 0 0 MAX ----0 0 0 0 0 0 0 0 0 0 MIN ----0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1997 MEAN 0 MAX 0 MIN 0 Note: Gage installed on 12/11/1996. Storage Volume Data Page 21 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 5972 Name: SunRidge Canyon Cap Drainage Area: 1.6 mi 2 Period of Record: 02/04/97 to current year Volume, in acre feet, Water Year October 1996 to September 1997 No significant storage since gage installation during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 -----------------------------------------------------------------------------WTR YR 1997 MEAN 0 MAX 0 MIN 0 Note: Gage installed on 02/04/1997. Storage Volume Data Page 22 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 5977 Name: GoldenEaglePark Cap Drainage Area: 7.13 mi 2 of which 2.02 mi 2, 2.13 mi 2, and 1.6 mi 2 are controlled by Aspen, North Heights, and Sunridge Canyon Dams respectively Period of Record: 12/12/96 to current year Volume, in acre feet, Water Year October 1996 to September 1997 No significant storage since gage installation during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------MEAN ----0 0 0 0 0 0 0 0 0 0 MAX ----0 0 0 0 0 0 0 0 0 0 MIN ----0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1997 MEAN 0 MAX 0 MIN 0 Note: Gage installed on 12/12/1996. Storage Volume Data Page 23 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 5982 Name: North Hghts Dam Cap Drainage Area: 2.13 mi 2 Period of Record: 10/11/96 to current year Volume, in acre feet, Water Year October 1996 to September 1997 No significant storage since gage installation during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 MEAN 0 MAX 0 MIN 0 Note: Gage installed on 10/11/1996. Storage Volume Data Page 24 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 5987 Name: Aspen Dam Capacity Drainage Area: 2.02 mi 2 Period of Record: 01/02/97 to current year Volume, in acre feet, Water Year October 1996 to September 1997 No significant storage since gage installation during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------MEAN ------0 0 0 0 0 0 0 0 0 MAX ------0 0 0 0 0 0 0 0 0 MIN ------0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1997 MEAN 0 MAX 0 MIN 0 Note: Gage installed on 01/02/1997. Storage Volume Data Page 25 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 5992 Name: Hesperus Dam Cap Drainage Area: 2.91 mi 2 Period of Record: 12/18/96 to current year Volume, in acre feet, Water Year October 1996 to September 1997 No significant storage since gage installation during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------MEAN ----0 0 0 0 0 0 0 0 0 0 MAX ----0 0 0 0 0 0 0 0 0 0 MIN ----0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1997 MEAN 0 MAX 0 MIN 0 Note: Gage installed on 12/18/1996. Storage Volume Data Page 26 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 6502 Name: Guadalupe FRS Cap Drainage Area: 1.87 mi 2 Period of Record: 06/29/89 to current year Volume, in acre feet, Water Year October 1996 to September 1997 No significant storage during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 MEAN 0 MAX 0 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 27 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 6608 Name: Freestone Basin Drainage Area: 4.26 mi 2 (area downstream of Eastern Canal only, does not include area from overflows of Eastern Canal) Period of Record: 12/19/1995 to current year Volume, in acre-feet, Water Year October 1996 to September 1997 Day Jan. 13 Aug. 3 Aug. 31 Rainfall produced impoundments of interest during Water Year 1997: Maximum Storage Maximum Storage Day (ac-ft) (% full) (ac-ft) (% full) 4.1 6.1 3.5 1.9 2.8 1.6 Feb. 28 Aug. 9 4.8 3.0 2.2 1.4 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 1 1 5 1 1 3 2 1 1 1 4 1 1 1 1 2 3 2 1 1 3 2 1 1 4 1 4 2 1 1 2 1 1 1 3 1 5 2 1 1 1 1 1 1 1 6 2 1 1 1 5 1 1 1 1 7 2 1 7 1 1 1 8 2 1 7 1 1 2 9 2 1 1 6 1 1 3 2 10 2 1 1 2 5 2 1 3 1 11 1 1 4 4 2 1 1 1 12 1 1 1 3 2 1 1 13 1 3 1 2 1 1 1 1 14 1 1 4 1 2 1 2 1 2 15 1 4 2 1 1 1 1 16 1 2 1 1 1 1 1 17 1 1 1 1 1 1 1 18 1 1 1 1 1 1 2 19 1 1 1 1 1 2 2 1 20 1 1 1 1 3 2 1 21 1 1 2 1 1 22 1 1 2 1 1 23 1 1 1 1 2 1 2 1 24 1 1 1 1 1 2 1 3 1 25 1 2 1 1 1 1 1 26 1 1 1 2 1 1 1 27 1 1 1 2 1 1 28 1 3 4 2 2 1 1 29 1 2 2 1 1 1 30 1 2 2 1 1 31 1 1 1 1 3 -----------------------------------------------------------------------------MEAN 1 1 1 1 1 1 0 2 1 1 1 1 MAX 2 2 2 7 7 5 4 7 3 3 6 4 MIN 0 0 0 0 0 0 0 0 0 0 0 0 ------------------------------------------------------------------------------ Storage Volume Data Page 28 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes WTR YR 1997 MEAN 1 MAX 7 MIN 0 Note: Many days of storage from irrigation tailwater. See also Pool Level Data. Storage Volume Data Page 29 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 6623 Name: Crossroads Park Drainage Area: 15.7 mi 2 (area downstream of US 60 only, does not include area from Eastern Canal tailwater ditch under US 60) Period of Record: 12/18/1995 to current year Volume, in acre-feet, Water Year October 1996 to September 1997 No significant storage during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 MEAN 0 MAX 0 MIN 0 See also Pool Level Data. Storage Volume Data Page 30 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 6627 Name: Signal Butte FRS Cap Drainage Area: 16.4 mi 2 not including area from Apache Junction FRS Period of Record: 11/10/87 to current year Volume, in acre feet, Water Year October 1996 to September 1997 Day Jan. 14 Maximum impoundments of interest during Water Year 1997: Maximum Storage Maximum Storage (ac-ft) (% full) Day (ac-ft) (% full) 8 0.5 Aug. 10 39 2.3 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 26 11 21 12 13 13 1 11 14 3 7 15 3 5 16 1 4 17 1 3 18 2 19 2 20 1 21 1 22 23 24 25 26 27 28 29 30 31 -----------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 3 0 MAX 0 0 0 8 0 0 0 0 0 0 39 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1997 MEAN 0 MAX 39 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 31 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Storage Volume Data Page 32 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 6672 Name: Apache Jct. FRS Cap Drainage Area: 5.8 mi 2 Period of Record: Nov. 1987 to current year Volume, in acre feet, Water Year October 1996 to September 1997 No significant storage during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 MEAN 0 MAX 0 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 33 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 6682 Name: Powerline FRS Cap Drainage Area: 49.9 mi 2 Period of Record: 12/03/92 to current year Volume, in acre feet, Water Year October 1996 to September 1997 Day Nov. 23 Feb. 28 Maximum impoundments of interest during Water Year 1997: Maximum Storage Maximum Storage (ac-ft) (% full) Day (ac-ft) (% full) 5 5 0.1 0.1 Jan. 13 6 0.1 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------13 2 28 3 -----------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 5 0 6 5 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1997 MEAN 0 MAX 6 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 34 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 6687 Name: Vineyard FRS Cap Drainage Area: 57.8 mi 2 Period of Record: Nov. 1987 to current year Volume, in acre feet, Water Year October 1996 to September 1997 Day Jan. 13 Maximum impoundments of interest during Water Year 1997: Maximum Storage (ac-ft) (% full) 36 1.0 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 18 14 20 15 8 16 5 17 1 18 19 20 21 22 23 24 25 26 27 28 29 30 31 -----------------------------------------------------------------------------MEAN 0 0 0 2 0 0 0 0 0 0 0 0 MAX 0 0 0 36 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1997 MEAN 0 MAX 36 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 35 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 6702 Name: Rittenhouse FRS Cap Drainage Area: 51.3 mi 2 Period of Record: 09/27/88 to current year Volume, in acre feet, Water Year October 1996 to September 1997 Day Aug. 8 Maximum impoundments of interest during Water Year 1997: Maximum Storage Maximum Storage Day (ac-ft) (% full) (ac-ft) (% full) 2 <0.1 Aug. 31 4 0.1 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------8 1 9 1 31 1 -----------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 4 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1997 MEAN 0 MAX 4 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 36 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 6812 Name: Buckeye FRS #3 Cap Drainage Area: 9.3 mi 2 Period of Record: 11/23/92 to current year Volume, in acre feet, Water Year October 1996 to September 1997 No significant storage during Water Year 1997. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 MEAN 0 MAX 0 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 37 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 6822 Name: White Tanks #4 Cap Drainage Area: 18.6 mi 2 (White Tanks ADMS) Period of Record: Nov. 1987 to current year Volume, in acre feet, Water Year October 1996 to September 1997 No impoundment above gage during Water Year 1997.* OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------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 1997 MEAN 0 MAX 0 MIN 0 * Significant storage volume exists below the instrument level due to the large borrow pits behind the dam. The storage volume behind the dam at the instrument level is 585 acre-feet. See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 38 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 7132 Name: Casandro Dam Cap Drainage Area: 1.3 mi 2 Period of Record: 08/15/1996 to current year Volume, in acre feet, Water Year October 1996 to September 1997 Day Sept. 26 Maximum storage impounded during Water Year 1997: Maximum Storage (ac-ft) (% full) 65 45 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 36 27 7 28 29 30 31 -----------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 1 MAX 0 0 0 0 0 0 0 0 0 0 0 65 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1997 MEAN 0 MAX 65 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 39 FCDMC Annual Surface Water Report Water Year 1997 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Storage Volume Data Page 40 FCDMC Annual Surface Water Report Water Year 1997 Comment/Errata Sheet Comments about this report or errors discovered may be forwarded to the Flood Warning and Data Collection Branch using this Comment/Errata sheet. Simply fold this sheet over in half so that the address labels are on the outside, tape closed, add a stamp and place in the mail. Comments: Errors (please include page numbers, gage names or IDs, and dates whenever possible): Appendix Comment/Errata Sheet FCDMC Annual Surface Water Report Water Year 1997 Comment/Errata Sheet Flood Control District of Maricopa County Flood Warning and Data Collection Branch 2801 W. Durango Street Phoenix, Arizona 85009 Place Stamp Here Flood Control District of Maricopa County Flood Warning and Data Collection Branch 2801 W. Durango Street Phoenix, Arizona 85009 Appendix Comment/Errata Sheet FCDMC Annual Surface Water Report Water Year 1997