ANNUAL HYDROLOGIC DATA REPORT VOLUME II SURFACE WATER DATA WATER YEAR 1998 PREFACE This publication presents the surface water data collected by the Flood Control District of Maricopa County's automated water level gage network. This telemetered network is located primarily throughout Maricopa County, Arizona with additional gages in Yavapai, Pinal, 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 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. ii TABLE OF CONTENTS Preface................................................................................................................................. ii Contents..............................................................................................................................iii Introduction ........................................................................................................................ iv Definition of Terms........................................................................................................... vii Surface Water Gage Location Map ..................................................................................... x List of Stations Sorted By Sensor ID# ............................................................................... xi List of Stations Sorted Alphabetically.............................................................................. xiv Summary of Significant Streamflow Events ...................................................................xvii Surface Water Streamflow Data................................................................................... Tab 1 Pool Levels at Storage Facilities .................................................................................. Tab 2 Storage Volumes at Storage Facilities.......................................................................... Tab 3 Comment/Errata Sheet .......................................................................................... Appendix iii 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 "Annual Hydrologic Data Report, Volume II -Surface Water Data." This report includes records on discharge at 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 50 stream gages and 34 flood control storage structures; (2) Depths of stored water at 36 flood control storage structures; and (3) Contents at 35 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 operated by the FCDMC are run cooperatively with the United States Geological Survey (USGS). Although real-time data for these sites are collected by the FCDMC ALERT System 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 1998 were: USGS Gage Name 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 FCDMC ID USGS ID 0783 0778 4523 4923 5503 5568 5508 6853 5223 5103 09478350 09479350 09512165 09512280 09513650 09513860 09513910 09514100 09516500 09517490 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. iv The cooperative crest stage gage sites for Water Year 1998 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 Finally, this year sensors were placed at two dams, Tat Momolikot and Whitlow Ranch Dams, monitored by the Corps of Engineers. Again, these data are collected in real-time by the FCDMC for the purpose of flood monitoring. Please refer to the Los Angeles District office for official data for these sites. This is the fifth 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 and/or indirect 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 v 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 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 feet 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. WY1998: WY1994-95 means that the data for Water Years 1994-1995 were revised in the report for Water Year 1998). 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. vi 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. vii 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. viii 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, 1998, is called the "1998 water year." ix x Flood Control District of Maricopa County ALERT System Water Level Sensors WY 1998 -- Sorted by ID# ID # Gage Name Installed T-R-S Latitude Longitude Elev. Page #s 769 778 783 788 793 798 4523 4563 4603 4613 4618 4623 4628 4638 4638 4643 4648 4653 4658 4668 4678 4683 4688 4693 4748 4803 4808 4813 4818 4823 4833 4903 4904 4918 4923 4938 5093 5103 5113 5128 5153 5203 5208 5223 5228 5233 Tat Momolikot Dam 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 nr McKellips Rd. IBW @ Indian Bend Rd. IBW @ Indian School Rd IBW @ Interceptor IBW @ McDonald Tatum Wash @ 40th St. Tatum Wash Basin Inflow IBW @ Sweetwater East Fork CC #1 Tatum Wash Basin East Fork CC #4 EFCC nr 7th Ave. Lake Marguerite East Fork CC #3 Berneil Wash IBW @ Shea Old X-cut @ McDowell 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 @ Wenden Centennial Railroad Saddleback FRS Harquahala FRS Narrows Dam Buckeye FRS #1 Buckeye FRS #2 Hassy R. nr Morristown Hassy R. @ US 60 Sunset FRS 1/21/98 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 11/25/97 4/21/94 11/24/97 6/3/94 5/6/98 12/27/90 3/2/94 5/8/98 1/18/94 5/21/97 11/25/97 9/13/94 7/30/98 6/9/98 7/27/94 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 9/16/98 2/9/90 12/16/88 3/1/94 9/1/94 7/26/83 11/11/92 5/7/96 3/14/94 2/12/89 32 30 46 33 10 19 33 05 15 32 52 47 32 52 48 32 52 49 33 26 00 33 28 01 33 26 58 33 32 01 33 29 42 33 32 00 33 31 26 33 34 16 33 34 54 33 36 15 33 40 11 33 34 57 33 38 55 33 37 40 33 33 49 33 38 45 33 34 01 33 34 55 33 27 56 33 33 45 33 30 49 33 32 31 33 34 47 33 35 03 33 35 59 33 42 58 33 42 58 33 47 28 33 53 05 33 44 06 33 49 30 33 18 35 33 27 55 33 32 56 33 43 58 33 27 31 33 26 26 33 53 05 33 58 13 33 57 50 111 57 06 112 00 20 111 41 11 111 49 43 111 56 01 111 56 46 111 57 43 111 40 48 111 54 58 111 54 48 111 54 38 111 53 55 111 54 33 111 59 44 111 59 01 112 00 18 112 01 29 111 58 58 112 00 35 112 04 49 111 53 56 112 02 19 111 56 17 111 58 03 111 58 48 112 01 54 111 59 56 112 02 35 112 03 14 112 09 16 112 06 39 112 02 43 112 02 43 112 00 05 111 57 17 111 50 36 113 31 55 112 52 56 113 04 21 113 05 47 113 31 49 112 45 02 112 35 47 112 39 42 112 43 31 112 44 33 1540 1120 1290 1311 1350 1305 1133 1595 1187 1280 1235 1280 1262 1300 1397 1400 1515 1394 1456 1325 1325 1456 1320 1350 1250 1407 1260 1230 1150 1225 1280 1649 1649 1800 2280 2600 1860 850 1177 1420 1960 1097 1150 1830 2035 2100 9S-4E-30 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-23 2N-4E-12 2N-4E-11 3N-4E-30 3N-4E-30 3N-3E-13 4N-3E-23 3N-4E-30 4N-3E-25 3N-3E-5 3N-4E-36 4N-3E-34 3N-4E-34 3N-4E-29 1N-4E-06 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 6N-12W-32 1S-6W-28 2N-10W-34 2N-8W-05 4N-12W-04 1N-5W-3 1N-3W-07 6N-4W-03 7N-5W-12 7N-5W-11 xi 1:1,2:1,3:1 1:2 1:3 1:4 1:5 1:6 1:7 1:8,2:2,3:2 1:9 1:10 1:11 1:12 1:13 1:14 1:15 1:16 1:17,2:3,3:3 1:18,2:4,3:4 1:19,2:5,3:5 1:20 1:21 1:22,2:6,3:6 1:23 1:24 1:25 1:26,2:7,3:7 1:27 1:28 1:29,2:8,3:8 1:30-32 1:33 1:34 2:9,3:9 1:35 1:36 2:10 1:37 1:38 1:39,2:11,3:10 1:40,2:12,3:11 1:41 1:42,2:13,3:12 1:43,2:14,3:13 1:44 1:45 1:46,2:15,3:14 Flood Control District of Maricopa County ALERT System Water Level Sensors WY 1998 -- Sorted by ID# ID # Gage Name Installed T-R-S Latitude Longitude Elev. Page #s 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 5983 5988 5993 6503 6563 6573 6583 6598 6603 6608 6623 6628 6673 6683 6688 6703 6707 6739 6813 6823 6853 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 North Heights Dam Aspen Dam Hesperus Dam Guadalupe FRS South Mountain Fan EMF @ Broadway EMF @ Queen Creek Rd. EMF @ Arizona Ave. Guadalupe Channel Freestone Park Basin Crossroads Park Basin Signal Butte FRS Apache Junction FRS Powerline FRS Vineyard FRS Rittenhouse FRS Queen Ck @ Rittenhouse Whitlow Ranch Dam Buckeye FRS #3 White Tanks 4 Gila @ Estrella Pkwy. 7/31/86 11/9/94 11/17/83 9/26/91 10/12/88 6/29/94 8/22/96 3/12/86 3/7/97 9/3/92 3/24/83 4/27/94 3/21/90 6/7/90 10/28/82 10/28/82 9/18/96 10/26/89 6/21/95 4/4/90 4/15/86 4/15/86 12/11/96 2/4/97 12/12/96 10/11/96 1/2/97 12/18/96 6/29/89 6/9/93 8/10/89 1/18/89 2/10/89 8/07/98 12/19/95 12/18/95 11/10/87 12/16/81 12/3/92 11/2/83 9/27/88 9/14/93 1/8/98 11/23/92 1/9/86 12/2/92 33 57 25 33 27 27 34 02 41 34 18 38 33 26 05 33 30 28 33 32 38 33 32 01 33 32 36 33 41 04 33 40 38 33 36 26 33 32 14 33 37 26 33 40 37 33 40 37 33 40 09 33 43 47 33 55 34 33 38 18 33 44 09 33 44 09 33 35 41 33 36 23 33 37 08 33 37 17 33 37 34 33 38 11 33 22 16 33 18 56 33 24 21 33 15 50 33 09 57 33 21 55 33 21 28 33 19 39 33 26 25 33 26 28 33 21 22 33 21 10 33 17 22 33 13 50 33 17 55 33 26 49 33 27 04 33 23 19 112 44 24 112 45 43 112 42 32 112 34 05 112 19 55 112 19 24 112 20 59 112 28 14 112 19 24 112 24 24 112 25 23 112 18 16 112 17 00 112 12 10 112 09 12 112 09 12 112 08 25 112 07 21 112 04 56 112 14 27 112 13 31 112 13 31 111 43 57 111 45 01 111 44 04 111 44 52 111 44 41 111 44 44 111 58 10 112 07 59 111 42 42 111 43 35 111 49 56 111 40 32 111 46 19 111 44 40 111 35 25 111 33 07 111 32 14 111 32 06 111 29 49 111 35 41 111 16 35 112 33 20 112 29 40 112 23 33 2200 1035 2245 3785 940 1025 1090 1190 1023 1337 1361 1125 1050 1220 1413 1413 1340 1475 1854 1200 1498 1498 1710 1932 1722 1819 1840 1894 1250 1420 1349 1317 1214 1345 1450 1270 1650 1989 1580 1582 1580 1400 2199 1200 1044 900 7N-5W-11 1N-5W-03 8N-4W-7 11N-3W-9 1N-1W-14 2N-1W-13 2N-1W-03 2N-2W-9 2N-1W-1 4N-1E-18 4N-2W-24 3N-1E-18 3N-1E-8 3N-1E-12 4N-2E-21 4N-2E-21 4N-2E-27 5N-2E-35 7N-3E-29 3N-1E-3 5N-1E-35 5N-1E-35 3N-6E-22 3N-6E-16 3N-6E-10 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-7E-6 1S-6E-8 1S-6E-21 1N-7E-12 1N-8E-8 1S-8E-9 1S-8E-9 2S-8E-2 2S-7E-25 1S-10E-36 1N-3W-10 1N-2W-5 1N-1W-31 xii 1:47,2:16,3:15 1:48 1:49 1:50 1:51 1:52 1:53 1:54,2:17,3:16 1:55 1:56 1:57,2:18,3:17 1:58 1:59 1:60-61 1:62 2:19,3:18 1:63 1:64 1:65 1:66 1:67 2:20,3:19 1:68,2:21,3:20 1:69,2:22,3:21 1:70,2:23,3:22 1:71,2:24,3:23 1:72,2:25,3:24 1:73,2:26,3:25 1:74,2:27,3:26 1:75 1:76 1:77 1:78 1:79 2:28,3:27 2:29,3:28 1:80,2:30,3:29 1:81,2:31,3:30 1:82,2:32,3:31 1:83,2:33,3:32 1:84,2:34,3:33 1:85 1:86,2:35,3:34 1:87,2:36,3:35 1:88,2:37,3:36 1:89 Flood Control District of Maricopa County ALERT System Water Level Sensors WY 1998 -- Sorted by ID# ID # 6863 6893 6923 6983 7013 7043 7063 7083 7093 7113 7133 Gage Name th Gila @ 115 Ave. Estrella Fan Sauceda Wash Vekol Wash Martinez Creek Sols Wash nr Matthie Hartman Wash Flying E Wash Casandro Wash Powder House Wash Casandro Dam Installed T-R-S Latitude Longitude Elev. Page #s 11/6/97 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 33 23 24 33 16 02 32 52 27 32 50 30 34 01 44 33 59 14 33 57 45 33 57 44 33 57 44 33 58 50 33 57 57 112 18 28 112 18 53 112 44 57 112 14 58 112 47 30 112 47 33 112 49 42 112 46 55 112 45 55 112 42 59 112 45 01 941 1425 726 1720 2300 2220 2488 2302 2240 2120 2163 1N-1E-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 xiii 1:90 1:91 1:92 1:93-94 1:95 1:96 1:97 1:98 1:99 1:100 1:101,2:38,3:37 Flood Control District of Maricopa County ALERT System Water Level Sensors WY 1998 -- Sorted by Name ID # Gage Name Installed T-R-S Latitude Longitude Elev. Page #s 4813 4808 4823 5523 5538 5539 5403 5503 6673 5988 4688 5203 5208 6813 7133 7093 4903 4904 4918 4923 4833 5093 5103 5408 6623 4803 5423 5413 4648 4683 4658 4668 6598 6573 6583 6893 7083 6608 6863 6853 778 783 5978 793 6603 6503 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 Berneil Wash 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 @ Wenden Centennial Railroad Colter @ El Mirage Crossroads Park Basin Dreamy Draw Dam Dysart Chnl @ El Mirage Dysart Drain @ LAFB East Fork CC #1 East Fork CC #3 East Fork CC #4 EFCC nr 7th Ave. EMF @ Arizona Ave. EMF @ Broadway EMF @ Queen Creek Rd. Estrella Fan Flying E Wash Freestone Park Basin Gila @ 115th Ave. Gila @ Estrella Pkwy. Gila @ Maricopa Rd Gila R. @ Olberg Golden Eagle Park Dam Greene Wash @ SR 84 Guadalupe Channel Guadalupe FRS 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 7/30/98 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 9/16/98 2/9/90 6/29/94 12/18/95 1/24/84 3/7/97 8/22/96 3/2/94 9/13/94 1/18/94 5/21/97 2/10/89 8/10/89 1/18/89 4/30/93 7/12/94 12/19/95 11/6/97 12/2/92 4/9/95 4/12/95 12/12/96 3/23/94 8/07/98 6/29/89 33 32 31 33 30 49 33 35 03 33 37 26 33 40 37 33 40 37 33 26 05 33 36 26 33 26 28 33 37 34 33 34 01 33 27 31 33 26 26 33 26 49 33 57 57 33 57 44 33 42 58 33 42 58 33 47 28 33 53 05 33 35 59 33 49 30 33 18 35 33 30 28 33 19 39 33 33 45 33 32 36 33 32 38 33 40 11 33 38 45 33 38 55 33 37 40 33 09 57 33 24 21 33 15 50 33 16 02 33 57 44 33 21 28 33 23 24 33 23 19 33 10 19 33 05 15 33 37 08 32 52 48 33 21 55 33 22 16 112 02 35 111 59 56 112 09 16 112 12 10 112 09 12 112 09 12 112 19 55 112 18 16 111 33 07 111 44 41 111 56 17 112 45 02 112 35 47 112 33 20 112 45 01 112 45 55 112 02 43 112 02 43 112 00 05 111 57 17 112 06 39 113 31 55 112 52 56 112 19 24 111 44 40 112 01 54 112 19 24 112 20 59 112 01 29 112 02 19 112 00 35 112 04 49 111 49 56 111 42 42 111 43 35 112 18 53 112 46 55 111 46 19 112 18 28 112 23 33 112 00 20 111 41 11 111 44 04 111 56 01 111 40 32 111 58 10 1230 1260 1225 1220 1413 1413 940 1125 1989 1840 1320 1097 1150 1200 2163 2240 1649 1649 1800 2280 1280 1860 850 1025 1270 1407 1023 1090 1515 1456 1456 1325 1214 1349 1317 1425 2302 1450 941 900 1120 1290 1722 1350 1345 1250 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 3N-4E-34 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 6N-12W-32 1S-6W-28 2N-1W-13 1S-6E-21 3N-3E-34 2N-1W-1 2N-1W-03 4N-3E-23 4N-3E-34 4N-3E-25 3N-3E-5 3S-5E-15 1N-6E-26 2S-6E-15 2S-1W-12 7N-5W-09 1S-6E-8 1N-1E-31 1N-1W-31 3S-3E-13 4S-6E-12 3N-6E-10 7S-4E-21 1S-7E-6 1S-4E-5 xiv 1:28 1:27 1:30-32 1:60-61 1:62 2:19,3:18 1:51 1:58 1:81,2:31,3:30 1:72,2:25,3:24 1:23 1:42,2:13,3:12 1:43,2:14,3:13 1:87,2:36,3:35 1:101,2:38,3:37 1:99 1:34 2:9,3:9 1:35 1:36 1:33 1:37 1:38 1:52 2:29,3:28 1:26,2:7,3:7 1:55 1:53 1:17,2:3,3:3 1:22,2:6,3:6 1:19,2:5,3:5 1:20 1:78 1:76 1:77 1:91 1:98 2:28,3:27 1:90 1:89 1:2 1:3 1:70,2:23,3:22 1:5 1:79 1:74,2:27,3:26 Flood Control District of Maricopa County ALERT System Water Level Sensors WY 1998 -- Sorted by Name ID # Gage Name Installed T-R-S Latitude Longitude Elev. Page #s 5128 7063 5308 5283 5228 5353 5223 5993 4613 4618 4623 4628 4693 4643 4603 4678 7013 5448 5438 5153 5598 5508 5613 5614 5983 4748 7113 6683 6707 4938 6703 5113 4523 788 798 6923 5543 6628 5583 5568 7043 6563 4563 5968 5248 5973 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 @ Indian School Rd IBW @ Interceptor IBW @ McDonald IBW @ Shea IBW @ Sweetwater IBW nr McKellips Rd. Lake Marguerite Martinez Creek McMicken Dam McMicken Floodway Narrows Dam New River @ Bell Rd. New River @ Glendale New River Outlet New River Pool North Heights Dam Old X-cut @ McDowell 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 3/1/94 7/6/94 11/17/83 11/9/94 3/14/94 9/26/91 5/7/96 12/18/96 9/28/83 11/25/97 4/21/94 11/24/97 6/9/98 12/27/90 5/21/85 11/25/97 11/23/94 3/24/83 9/3/92 9/1/94 4/4/90 3/21/90 4/15/86 4/15/86 10/11/96 7/27/94 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 33 32 56 33 57 45 34 02 41 33 27 27 33 58 13 34 18 38 33 53 05 33 38 11 33 32 01 33 29 42 33 32 00 33 31 26 33 34 55 33 36 15 33 26 58 33 33 49 34 01 44 33 40 38 33 41 04 33 43 58 33 38 18 33 32 14 33 44 09 33 44 09 33 37 17 33 27 56 33 58 50 33 21 22 33 13 50 33 44 06 33 17 22 33 27 55 33 26 00 32 52 47 32 52 49 32 52 27 33 40 09 33 26 25 33 55 34 33 43 47 33 59 14 33 18 56 33 28 01 33 35 41 33 57 25 33 36 23 113 05 47 112 49 42 112 42 32 112 45 43 112 43 31 112 34 05 112 39 42 111 44 44 111 54 48 111 54 38 111 53 55 111 54 33 111 58 03 112 00 18 111 54 58 111 53 56 112 47 30 112 25 23 112 24 24 113 31 49 112 14 27 112 17 00 112 13 31 112 13 31 111 44 52 111 58 48 112 42 59 111 32 14 111 35 41 111 50 36 111 29 49 113 04 21 111 57 43 111 49 43 111 56 46 112 44 57 112 08 25 111 35 25 112 04 56 112 07 21 112 47 33 112 07 59 111 40 48 111 43 57 112 44 24 111 45 01 1420 2488 2245 1035 2035 3785 1830 1894 1280 1235 1280 1262 1350 1400 1187 1325 2300 1361 1337 1960 1200 1050 1498 1498 1819 1250 2120 1580 1400 2600 1580 1177 1133 1311 1305 726 1340 1650 1854 1475 2220 1420 1595 1710 2200 1932 2N-8W-05 7N-5W-12 8N-4W-7 1N-5W-03 7N-5W-12 11N-3W-9 6N-4W-03 3N-6E-4 2N-4E-11 2N-4E-23 2N-4E-12 2N-4E-11 3N-4E-29 3N-3E-13 1N-4E-11 3N-4E-36 8N-5W-17 4N-2W-24 4N-1E-18 4N-12W-04 3N-1E-3 3N-1E-8 5N-1E-35 5N-1E-35 3N-6E-9 1N-4E-06 7N-4W-06 1S-8E-9 2S-7E-25 5N-5E-33 2S-8E-2 2N-10W-34 1N-4E-17 7S-5E-21 7S-4E-20 6S-5W-4 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 xv 1:40,2:12,3:11 1:97 1:49 1:48 1:45 1:50 1:44 1:73,2:26,3:25 1:10 1:11 1:12 1:13 1:24 1:16 1:9 1:21 1:95 1:57,2:18,3:17 1:56 1:41 1:66 1:59 1:67 2:20,3:19 1:71,2:24,3:23 1:25 1:100 1:82,2:32,3:31 1:85 2:10 1:84,2:34,3:33 1:39,2:11,3:10 1:7 1:4 1:6 1:92 1:63 1:80,2:30,3:29 1:65 1:64 1:96 1:75 1:8,2:2,3:2 1:68,2:21,3:20 1:47,2:16,3:15 1:69,2:22,3:21 Flood Control District of Maricopa County ALERT System Water Level Sensors WY 1998 -- Sorted by Name ID # Gage Name Installed T-R-S 5233 769 4638 4653 4638 4818 6983 6688 5418 6823 6739 Sunset FRS 2/12/89 7N-5W-11 Tat Momolikot Dam 1/21/98 9S-4E-30 Tatum Wash @ 40th St. 6/3/94 3N-4E-30 Tatum Wash Basin 5/8/98 3N-4E-30 Tatum Wash Basin Inflow 5/6/98 3N-4E-30 10th Street Wash Basin #1 11/26/96 3N-3E-28 Vekol Wash 3/7/90 7S-1E-3 Vineyard FRS 11/2/83 1S-8E-9 White Tanks 3 3/12/86 2N-2W-9 White Tanks 4 1/9/86 1N-2W-5 Whitlow Ranch Dam 1/8/98 1S-10E-36 xvi Latitude Longitude Elev. Page #s 33 57 50 32 30 46 33 34 16 33 34 57 33 34 54 33 34 47 32 50 30 33 21 10 33 32 01 33 27 04 33 17 55 112 44 33 111 57 06 111 59 44 111 58 58 111 59 01 112 03 14 112 14 58 111 32 06 112 28 14 112 29 40 111 16 35 2100 1540 1300 1394 1397 1150 1720 1582 1190 1044 2199 1:46,2:15,3:14 1:1,2:1,3:1 1:14 1:18,2:4,3:4 1:15 1:29,2:8,3:8 1:93-94 1:83,2:33,3:32 1:54,2:17,3:16 1:88,2:37,3:36 1:86,2:35,3:34 SUMMARY OF SIGNIFICANT STREAMFLOW EVENTS Water Year 1998 saw a relatively high amount of streamflow across the ALERT network including record discharges in the Arizona Canal Diversion Channel (ACDC) and significant flow volumes during the month of February. The winter season was heavily influenced by the effects of the very strong El Niño. These effects were felt especially during February when streamflow occurred at various locations on the 4th, 9th-10th, 15th, 17th, 20th, and the 24th-25th. During the end of March there were two additional flood events. The result of the repeated floods in February was the persistence of water in many streams and flood control structures for many days on end. The ACDC at 67th Avenue had some level of discharge for nearly the entire month of February as well as a week spanning the end March and beginning of April. The New River Dam and New River at Bell experiencd similar periods of prolonged discharges. The New River below the confluence of Skunk Creek and the ACDC began to look like a perennial stream. Indian Bend Wash also flowed for many days in February and March as a result of repeated storms. The wet winter conditions even resulted in small releases from Salt River Project dams over Granite Reef Dam into the normally dry Salt River bed through Phoenix in the first and second weeks of April. Eventually though the desert returned and May and June proved typically dry. While the summer monsoon started with a bang in early July, it generally fizzled through the remainder of the season. The first storm and flood occurred on July 6 when record discharges were recorded on the ACDC. At the 43rd Avenue gaging station, a peak discharge of 2,500 cfs was recorded while at 67th Avenue a peak discharge of 2,150 cfs was recorded. These both are the highest recorded discharges since publication of data began in Water Year 1994. Another generally less significant flood followed the very next day. While the ACDC had fairly uninspiring peak discharges, Vekol Wash had its maximum discharge for the year of 1,230 cfs. Other significant events during the monsoon included an impoundment of almost 10 percent capacity at Vineyard FRS on July 23rd, about a 5-year discharge at Hartman Wash on August 12th, and on August 25th on Sauceda Wash. The significant flows and/or impoundments recorded by the FCDMC for Water Year 1998 are summarized in the following table. Summary Page xvii FCDMC Annual Surface Water Report Water Year 1998 Maximum Flows and Impoundments for Water Year 1998 at Selected FCDMC Water Level Sensor Locations Location th ACDC @ 14 Street rd ACDC @ 43 Ave th ACDC @ 67 Ave Casandro Dam Casandro Wash Cave Creek at Cactus Road Cave Creek near Cave Creek Dysart Channel @ El Mirage Road th East Fork Cave Creek near 7 Avenue Freestone Park Retention Basin th Gila River @ 115 Ave Hartman Wash Hassayampa River at Box Canyon Indian Bend Wash at McDonald Drive Indian Bend Wash near McKellips Road New River Dam Powder House Wash Sauceda Wash Skunk Creek near New River Road Sunset FRS Tenth Street Wash Basin #1 Vekol Wash Vineyard FRS Summary Page xviii Discharge (cfs) 160 2,500 2,150 12 150 1,040 1,040 280 810 5,000 1,120 1,250 620 430 590 210 1,320 150 20 15 1,230 43 Stage (feet) 1.75 3.08 6.05 3.34 1.46 11.18 2.88 3.00 4.36 8.80 7.57 3.08 5.22 1.12 1.88 9.42 0.73 4.66 1.90 5.36 1.95 4.65 2.83 Contents (ac-ft) Date (%full) 10.3 7.2 18 8.3 439 1.0 6 1.22 7.0 5.6 323 9.1 7/6/98 7/6/98 7/6/98 8/12/98 8/12/98 7/6/98 3/29/98 2/17/98 7/6/98 8/16/98 4/13/98 8/12/98 3/29/98 2/15/98 2/5/98 3/29/98 8/11/98 8/25/98 7/23/98 8/13/98 8/15/98 7/7/98 7/22/98 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 769 Tat Momolikot Dam Drainage Area: 1,780 mi2 Period of Record: FCDMC 1/21/98 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Refer to the U.S. Army Corps of Engineers, Los Angeles District for official data at this site. Surface Water Streamflow Data Page 1 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: USGS Gage: 778 Name: Gila @ Maricopa Rd Gila River near Maricopa, AZ, ID# 09479350 Drainage Area: 19,915 mi2 See USGS Water-Data Report AZ-98-1 for data for this site. Surface Water Streamflow Data Page 2 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: USGS Gage: 783 Name: Gila R. @ Olberg Gila River near Sacaton, AZ, ID# 09478350 Drainage Area: 18,674 mi2 See USGS Water-Data Report AZ-98-1 for data for this site. Surface Water Streamflow Data Page 3 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 788 Santa Cruz @ SR 84 Drainage Area: Undetermined Period of Record: 03/16/94 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Peak flows of interest during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) Day Feb. 9 Dec. 10 270 100 Feb. 26 100 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 1 9 2 49 14 1 3 39 1 1 4 5 5 5 5 1 1 6 8 2 7 2 18 8 20 1 3 21 9 71 140 1 24 10 86 47 3 4 11 17 2 1 12 25 1 13 20 7 14 28 3 3 6 15 2 1 31 16 41 60 17 54 48 18 2 10 19 6 20 21 6 2 22 1 9 23 28 3 24 10 25 45 13 13 26 53 91 3 27 43 5 19 28 9 7 20 29 5 6 30 2 1 31 15 -----------------------------------------------------------------------------TOTAL 50 0 389 145 417 49 15 9 1 118 170 0 MEAN 2 0 13 5 15 2 1 0 0 4 5 0 MAX 38 0 101 68 269 30 30 10 6 46 64 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 100 0 771 288 828 96 31 18 1 233 338 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 1363 MEAN 4 MAX 269 MIN 0 AC_FT 2703 Note: Many flows due to irrigation return water. Surface Water Streamflow Data Page 4 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 793 Greene Wash @ SR 84 Drainage Area: Undetermined Period of Record: 03/23/94 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Feb. 9 Peak flows of interest during Water Year 1998: Minimum flow recorded by gage is about 40 cfs at 0.1 ft gage height. Peak Discharge (cfs) Day Peak Discharge (cfs) 130 Feb. 20 50 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 35 10 11 12 13 14 15 16 17 18 19 20 12 21 1 22 23 24 25 26 27 28 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 0 0 48 0 0 0 0 0 0 0 MEAN 0 0 0 0 2 0 0 0 0 0 0 0 MAX 0 0 0 0 130 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 95 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 48 MEAN 0 MAX 130 MIN 0 AC_FT 95 Surface Water Streamflow Data Page 5 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 798 Santa Rosa @ SR 84 Drainage Area: Undetermined (1,780 mi2 is controlled by Tat Momolikot Dam) Period of Record: 03/16/94 to current year Discharge, in cfs, Water Year October 1997 to September 1998 No flow above gage during Water Year 1998. Minimum flow recorded by gage is about 325 cfs at -0.14 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 1998 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 Surface Water Streamflow Data Page 6 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: USGS Gage: 4523 Name: Salt R. @ Priest Dr. Salt River at Priest Drive, ID# 09512165 Drainage Area: 13,223 mi2 See USGS Water-Data Report AZ-98-1 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 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 4563 Spookhill FRS Drainage Area: 13.6 mi2 Period of Record: Nov. 1987 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Feb. 9 Mar. 30 Peak outflows of interest during Water Year 1998:* Peak Discharge (cfs) Day Peak Discharge (cfs) 16 15 Feb. 20 Aug. 1 18 34 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 1 2 12 2 4 3 4 3 5 4 6 7 8 2 9 10 10 1 5 11 1 4 12 1 13 14 15 6 16 6 17 5 18 7 19 5 20 7 21 9 22 5 23 6 4 24 3 5 25 1 8 26 6 1 27 5 28 4 29 30 9 31 8 1 -----------------------------------------------------------------------------TOTAL 11 0 0 2 111 20 2 0 0 1 16 0 MEAN 0 0 0 0 4 1 0 0 0 0 1 0 MAX 11 0 0 4 18 15 5 0 0 31 34 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 22 0 0 4 221 40 4 0 0 1 31 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 163 MEAN 0 MAX 34 MIN 0 AC_FT 324 * Outflow controlled by gated outlet below 11.5 ft gage height. See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 8 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 4603 IBW nr McKellips Rd. Drainage Area: 101 mi2 Period of Record: Nov. 1987 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Feb. 5 Feb. 25 Peak flows of interest during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) 450 170 Feb. 15 Mar. 27 240 240 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 10 1 2 8 1 3 2 1 4 84 1 1 5 160 1 6 28 1 9 7 3 8 4 5 8 2 1 11 2 1 9 1 82 1 3 10 1 8 46 3 11 13 18 1 12 20 2 3 13 15 14 1 14 1 1 1 15 1 9 90 1 1 2 1 16 1 43 1 1 17 1 21 3 2 18 1 76 1 2 19 24 2 20 7 2 21 4 2 22 39 11 5 23 28 1 1 24 5 5 1 25 1 1 91 1 1 26 1 1 17 9 2 27 2 88 1 28 1 19 1 2 29 1 32 2 30 37 1 31 14 1 -----------------------------------------------------------------------------TOTAL 0 16 79 80 821 201 22 0 0 34 13 48 MEAN 0 1 3 3 29 6 1 0 0 1 0 2 MAX 0 5 65 31 431 240 16 0 0 87 100 16 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 32 156 158 1628 399 44 0 0 68 26 96 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 1314 MEAN 4 MAX 431 MIN 0 AC_FT 2607 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 9 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 4613 IBW @ Indian Bend Drainage Area: approximately 88 mi2 (including area east of Pima Rd from Interceptor Channel) Period of Record: USGS -- 1961-1984; FCDMC -- Nov. 1987 to current water year Discharge, in cfs, Water Year October 1997 to September 1998 Day Feb. 4 Feb. 24 Mar. 29 Peak flows of interest during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) 470 480 480 Feb. 15 Mar. 26 580 900 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 26 2 33 3 20 4 160 1 5 101 6 27 7 7 8 24 9 150 10 75 11 28 12 14 13 14 15 193 16 39 17 52 18 133 19 28 20 22 21 27 22 89 23 16 24 100 25 140 26 28 228 27 11 123 28 26 29 209 30 46 31 31 -----------------------------------------------------------------------------TOTAL 0 0 105 0 1360 663 80 0 0 0 0 0 MEAN 0 0 3 0 49 21 3 0 0 0 0 0 MAX 0 0 330 0 581 900 39 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 208 0 2697 1315 158 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 2207 MEAN 6 MAX 900 MIN 0 AC_FT 4378 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 3,500 12,000 17,000 Note: Variable tall grass in this channel reach creates significant uncertainty for flows below about 2 ft gage height (which includes all peaks in WY 1998). See also flows at 4628 about 1 mile downstream. Surface Water Streamflow Data Page 10 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 4618 IBW @ Indian School Drainage Area: approximately 90 mi2 * Period of Record: 11/25/97 to current water year** Discharge, in cfs, Water Year October 1997 to September 1998 Peak flows of interest during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) Day Feb. 4 Feb. 15 Feb. 24 370 380 210 Feb. 9 Feb. 18 Mar. 26 110 120 290 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 99 5 66 6 7 8 9 38 10 6 11 12 13 14 15 76 16 1 17 18 46 19 20 21 22 4 23 24 21 25 74 26 1 58 27 27 28 29 21 30 31 -----------------------------------------------------------------------------TOTAL --0 4 0 429 108 0 0 0 0 0 0 MEAN --0 0 0 15 3 0 0 0 0 0 0 MAX --0 35 0 379 285 0 0 0 0 0 0 MIN --0 0 0 0 0 0 0 0 0 0 0 AC_FT --0 9 0 852 213 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 541 MEAN 1 MAX 379 MIN 0 AC_FT 1074 * Note: Gage is located on "low flow" bypass channel which begins at McDonald Drive. Inflows from the east of IBW south of McDonald are not recorded by this station. ** Gage installed 11/25/97. Surface Water Streamflow Data Page 11 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 4623 IBW Interceptor Drainage Area: 35 mi2 Period of Record: 04/21/94 to current year Discharge, in cfs, Water Year October 1997 to September 1998 No flow during Water Year 1998. 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 1998 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 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 4628 IBW @ McDonald Drainage Area: approximately 88 mi2 Period of Record: 11/24/97 to current year* Discharge, in cfs, Water Year October 1997 to September 1998 Peak flows of interest during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) Day Feb. 4 Feb. 24 550 450 Feb. 15 Mar. 26 620 570 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 1 2 9 3 4 147 5 97 6 7 7 8 4 9 71 10 38 11 12 13 14 15 136 16 27 17 13 18 77 19 6 20 21 22 30 23 2 24 71 25 105 26 9 130 27 67 28 10 29 71 30 42 31 5 -----------------------------------------------------------------------------TOTAL --0 32 0 810 324 10 0 0 0 0 0 MEAN --0 1 0 29 10 0 0 0 0 0 0 MAX --0 80 0 621 565 17 0 0 0 0 0 MIN --0 0 0 0 0 0 0 0 0 0 0 AC_FT --0 63 0 1607 642 20 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 1176 MEAN 3 MAX 621 MIN 0 AC_FT 2332 * Gage installed 11/24/97. Flood Flow Frequency Should be essentially identical to FFF at 4613, IBW @ Indian Bend Surface Water Streamflow Data Page 13 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 4638 Tatum Wash @ 40th Drainage Area: 1.82 mi2 Period of Record: 06/03/94 to 05/06/98 when moved to Tatum Wash Basin inlet channel Revised Records: WY1996: WY1995 Discharge, in cfs, Water Year October 1997 to September 1998 Day Feb. 24 Peak flows of interest during Water Year 1998: Peak Discharge (cfs) 40 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------24 4 -----------------------------------------------------------------------------TOTAL 0 0 0 0 4 0 0 ----------MEAN 0 0 0 0 0 0 0 ----------MAX 0 0 0 0 38 0 0 ----------MIN 0 0 0 0 0 0 0 ----------AC_FT 0 0 0 0 9 0 0 ---------------------------------------------------------------------------------------WTR YR 1998 TOTAL 4 MEAN 0 MAX 38 MIN 0 AC_FT 9 Flood Flow Frequency (HEC-1 for Tatum Wash Detention Basin Analysis, 1995) 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 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 4638 Tatum Wash Basin Inflow Drainage Area: 2.17 mi2 Period of Record: 05/06/98 to current year; previously from 6/03/94 to 05/06/98 called Tatum Wash @ 40th Street located approximately 1 mile upstream Discharge, in cfs, Water Year October 1997 to September 1998 No flow at this location since installation in Water Year 1998. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------TOTAL --------------0 0 0 0 0 MEAN --------------0 0 0 0 0 MAX --------------0 0 0 0 0 AC_FT --------------0 0 0 0 0 MIN --------------0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 th Note: Gage installed at this location 5/6/98. Moved from Tatum Wash @ 40 Street. Flood Flow Frequency (Report on Hydrology of Tatum Wash, 1995) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 2-year 10-year 50-year 100-year 335 850 1,800 2,300 Surface Water Streamflow Data Page 15 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 4643 IBW @ Sweetwater Drainage Area: 9.2 mi2 Period of Record: 12/27/90 to current year* Discharge, in cfs, Water Year October 1997 to September 1998 Gage out of service during all of Water Year 1998: 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 16 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 4648 E.Fork CC #1 Drainage Area: 1.18 mi2 Period of Record: 03/02/94 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Feb. 4 No outflows during Water Year 1998 except on following days: Peak Discharge (cfs) Day Peak Discharge (cfs) 8 July 6 14 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 2 5 6 7 8 1 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 2 0 0 0 0 2 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 8 0 0 0 0 14 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 4 0 0 0 0 4 0 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 4 MEAN 0 MAX 14 MIN 0 AC_FT 8 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 17 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 4653 Tatum Wash Basin Drainage Area: 2.17 mi2 Period of Record: 05/08/98 to current year Discharge, in cfs, Water Year October 1997 to September 1998 No outflow at this location since installation in Water Year 1998. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------TOTAL --------------0 0 0 0 0 MEAN --------------0 0 0 0 0 MAX --------------0 0 0 0 0 AC_FT --------------0 0 0 0 0 MIN --------------0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 Note: Gage installed 5/8/98. Also, basin discharges from principle outlet assume inlet control. Tailwater conditions in outlet storm drain unknown. See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 18 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 4658 E.Fork CC #4 Drainage Area: 0.68 mi2 Period of Record: 01/18/94 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Feb. 4 July 6 Peak outflows for impoundments greater than 2.0 ft during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) 39 42 Feb. 15 38 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 2 1 3 1 4 11 1 5 1 1 1 6 1 1 3 1 7 3 4 8 2 4 2 9 1 7 1 10 2 2 1 11 1 1 2 12 1 2 13 1 1 14 1 15 6 2 1 16 1 1 2 17 5 2 1 1 18 3 2 2 1 19 1 1 1 20 3 2 21 1 1 1 22 5 1 2 23 1 1 24 6 25 2 2 26 1 5 1 27 1 2 28 1 3 29 2 30 1 31 1 -----------------------------------------------------------------------------TOTAL 0 0 14 7 59 23 14 2 0 13 9 6 MEAN 0 0 0 0 2 1 0 0 0 0 0 0 MAX 0 0 20 9 39 19 17 5 0 42 16 8 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 29 14 117 45 28 4 0 25 18 12 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 147 MEAN 0 MAX 42 MIN 0 AC_FT 292 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 19 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 4668 EFCC nr 7thAve Drainage Area: 14.1 mi2 Period of Record: 05/21/97 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Feb. 4 July 6 Maximum flow during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) 430 810 Feb. 15 July 7 170 150 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 1 2 2 3 4 79 5 28 6 1 44 2 7 34 8 12 9 7 9 3 19 1 10 2 2 8 11 1 3 12 2 2 1 13 1 14 1 15 26 6 3 16 3 2 3 17 12 2 4 18 8 2 3 19 1 20 4 21 3 3 22 15 23 2 24 2 13 25 1 23 26 2 16 27 4 28 6 29 6 30 4 31 -----------------------------------------------------------------------------TOTAL 0 0 40 7 236 49 3 0 0 96 13 3 MEAN 0 0 1 0 8 2 0 0 0 3 0 0 MAX 0 0 41 9 427 38 6 0 0 810 35 6 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 79 15 469 98 5 0 0 190 25 6 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 447 MEAN 1 MAX 810 MIN 0 AC_FT 886 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 20 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 4678 Lake Marguerite Drainage Area: Undetermined Period of Record: 11/25/97 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Maximum flows during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) Day Feb. 15 140* Mar. 26 140* OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------TOTAL --0 0 0 0 0 0 0 0 0 0 0 MEAN --0 0 0 0 0 0 0 0 0 0 0 MAX --0 0 0 143* 143* 0 0 0 0 0 0 MIN --0 0 0 0 0 0 0 0 0 0 0 AC_FT --0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 0 MEAN 0 MAX 143* MIN 0 AC_FT 0 * Instrument failed. Maximums from high water marks at the gage. Therefore, no volumes or mean flows reported. Also, note that about 60 cfs pass the gage before detection due to the elevation of the instrument. Surface Water Streamflow Data Page 21 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 4683 E.Fork CC #3 Drainage Area: 3.52 mi2 (1.86 mi2 controlled by EFCC #1 and EFCC #4) Period of Record: 07/27/94 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Peak outflows greater than 10 cfs during Water Year 1998: Peak Discharge (cfs) Day July 6 19 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 2 5 6 1 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 2 0 0 0 0 1 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 10 0 0 0 0 19 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 4 0 0 0 0 3 0 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 3 MEAN 0 MAX 19 MIN 0 AC_FT 7 * Flows up to about the 2-year are passed beneath the detention basin via storm drains. Also, the events during WY 1998 appear to have been caused by local flow from the area immediate to the gage only. See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 22 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 4688 Berneil Wash Drainage Area: approximately 9.5 mi2 (significant split flows at Mt. View & 64th St and Mt. View & Miller Road) Period of Record: 7/30/98 to current year* Discharge, in cfs, Water Year October 1997 to September 1998 Day Flow occurred only on following day during Water Year 1998:* Peak Discharge (cfs) Aug. 17 14 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------TOTAL ------------------0 0 0 MEAN ------------------0 0 0 MAX ------------------0 14 0 MIN ------------------0 0 0 AC_FT ------------------0 1 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 0 MEAN 0 MAX 14 MIN 0 AC_FT 1 * Gage installed 7/30/98. Note: Daily mean for Aug. 17 rounds to zero cfs. Therefore not shown. Surface Water Streamflow Data Page 23 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 4693 IBW @ Shea Drainage Area: 24.6 mi2 Period of Record: 6/9/98 to current year* Discharge, in cfs, Water Year October 1997 to September 1998 Day July 6 Maximum flows of interest during Water Year 1998:* Day Peak Discharge (cfs) Peak Discharge (cfs) 340 Aug. 15 180 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 22 7 15 8 9 10 11 1 12 13 14 15 9 16 24 17 2 18 1 19 20 21 22 4 23 24 2 2 25 26 27 28 2 29 6 30 3 31 -----------------------------------------------------------------------------TOTAL ----------------0 42 37 14 MEAN ----------------0 1 1 0 MAX ----------------0 339 179 37 MIN ----------------0 0 0 0 AC_FT ----------------0 84 74 27 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 93 MEAN 0 MAX 339 MIN 0 AC_FT 185 * Gage installed 06/09/98. Flood Flow Frequency (based on HECWRC implementation of Bulletin 17B, n = 14 for crest stage gage, 09512090, operated by USGS about 500 ft upstream of Shea Blvd.) 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 820 1,810 2,730 3,840 5,630 7,260 Surface Water Streamflow Data Page 24 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 4748 Old Xcut @ McDowell Period of Record: 07/27/94 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Feb. 4 Feb. 15 Peak flows of interest during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) 110 180 Feb. 9 July 22 120 120 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 36 14 2 37 3 3 36 10 4 33 39 13 5 26 10 14 6 4 3 25 9 2 9 7 19 25 12 4 8 19 13 9 12 9 25 26 25 12 10 9 14 1 27 25 13 11 3 3 28 25 3 12 2 30 27 13 28 12 22 14 12 30 15 29 15 9 25 28 9 30 16 13 16 25 31 17 25 17 22 25 30 4 18 25 9 26 25 26 32 19 25 19 3 25 28 34 3 20 25 28 11 13 26 32 3 21 25 28 4 25 25 34 22 26 33 13 3 32 9 1 23 26 4 13 31 24 28 7 3 12 19 25 27 26 28 12 9 27 26 16 28 26 6 29 27 13 9 30 36 4 3 31 -----------------------------------------------------------------------------TOTAL 0 410 327 17 192 490 337 454 0 17 4 14 MEAN 0 14 11 1 7 16 11 15 0 1 0 0 MAX 0 39 78 48 177 84 57 36 0 124 71 57 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 814 649 34 380 973 668 901 0 33 8 28 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 2263 MEAN 6 MAX 177 MIN 0 AC_FT 4488 Surface Water Streamflow Data Page 25 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 4803 Dreamy Draw Dam Drainage Area: 1.3 mi2 Period of Record: Nov. 1987 to current year Revised Records: WY1996: WY1995 Discharge, in cfs, Water Year October 1997 to September 1998 Day Feb. 24 Aug. 15 Peak outflows of interest during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) 90 50 Mar. 26 80 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 1 3 4 6 5 1 6 7 1 8 9 2 10 11 12 13 14 15 4 1 16 17 2 18 2 19 20 1 21 1 1 22 4 23 1 24 7 25 2 26 1 6 27 1 28 1 29 3 30 1 31 -----------------------------------------------------------------------------TOTAL 0 0 6 0 33 11 1 0 0 1 2 0 MEAN 0 0 0 0 1 0 0 0 0 0 0 0 MAX 0 0 17 0 92 79 1 0 0 2 47 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 13 0 66 23 2 0 0 2 3 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 55 MEAN 0 MAX 92 MIN 0 AC_FT 108 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 26 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 4808 ACDC @ 36 St Drainage Area: 4.82 mi2 Period of Record: 02/24/94 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Mar. 26 Peak flows of interest during Water Year 1998: Peak Discharge (cfs) 19 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 1 2 3 4 2 5 1 6 7 8 1 9 2 10 1 11 12 13 14 15 2 16 17 1 18 2 19 20 21 22 2 23 24 1 25 26 5 27 1 28 1 29 1 30 1 31 -----------------------------------------------------------------------------TOTAL 0 0 3 1 12 8 1 0 0 1 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 3 3 7 19 3 0 0 2 0 2 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 6 1 23 16 2 0 0 1 0 1 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 26 MEAN 0 MAX 19 MIN 0 AC_FT 51 Flood Flow Frequency for inflow to sediment basin (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 590 2,510 5,410 Surface Water Streamflow Data Page 27 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 4813 ACDC @ 14 St Drainage Area: 10.2 mi2 Period of Record: 02/09/94 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Feb. 4 Peak flows of interest during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) 90 July 6 160 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 16 5 6 9 7 14 8 9 1 10 11 12 13 14 15 3 16 17 18 19 20 21 22 23 24 7 25 26 2 27 28 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 0 0 98 2 0 0 0 23 0 0 MEAN 0 0 0 0 4 0 0 0 0 1 0 0 MAX 0 0 0 0 93 24 0 0 0 155 21 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 195 3 0 0 0 45 1 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 123 MEAN 0 MAX 155 MIN 0 AC_FT 243 Surface Water Streamflow Data Page 28 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 4818 10 St.Wash Basin #1 Drainage Area: 1.21 mi2 Period of Record: 11/26/96 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Feb. 4 July 6 Peak flows of interest during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) 15 9 Feb. 15 Aug. 15 12 15 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 5 6 1 7 1 8 9 10 11 12 13 14 15 2 1 16 1 17 18 19 20 21 22 1 23 24 1 25 26 1 27 28 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 1 0 9 1 0 0 0 2 2 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 3 1 15 10 0 0 0 9 15 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 1 0 17 3 0 0 0 3 5 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 15 MEAN 0 MAX 15 MIN 0 AC_FT 29 Note: Up to 300 cfs may bypass the basin in Tenth Street Wash. Surface Water Streamflow Data Page 29 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 4823 ACDC @ 43 Av Drainage Area: 56 mi2 below Cave Buttes Dam Period of Record: 12/17/91 to current year Revised Records: WY1998: WY1997 Discharge, in cfs, Water Year October 1997 to September 1998 Peak flows of interest during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) Day Feb. 4 Mar. 26 July 7 * 850 520 620 Feb. 15 July 6 Sept. 11 790 2,490* 570 Highest recorded flow since installation. Flood of July 6, 1998 on the ACDC at 43rd Ave. 15-Minute Maximum Discharges Discharge (cfs) 3,000 2,500 2,000 1,500 1,000 500 0 7/6/98 18:00 7/7/98 0:00 Date Time 7/7/98 6:00 7/7/98 12:00 Continued on following page Surface Water Streamflow Data Page 30 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 4823 ACDC @ 43 Av (cont.) Drainage Area: 56 mi2 below Cave Buttes Dam Period of Record: 12/17/91 to current year Revised Records: WY1998: WY1997 Discharge, in cfs, Water Year October 1997 to September 1998 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 288 5 82 6 159 7 9 237 8 3 9 14 10 11 40 12 13 14 15 150 16 17 36 18 11 19 20 21 22 13 23 24 101 25 25 26 154 27 28 29 21 30 76 31 -----------------------------------------------------------------------------TOTAL 0 0 21 0 707 251 0 0 0 399 0 40 MEAN 0 0 1 0 25 8 0 0 0 13 0 1 MAX 0 0 230 0 854 517 0 0 0 2489 0 569 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 42 0 1403 498 0 0 0 791 0 80 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 1418 MEAN 4 MAX 2489* MIN 0 AC_FT 2813 Note: Minimum flow recorded by gage 230 cfs. * Highest recorded flow since installation. Surface Water Streamflow Data Page 31 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 4823 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 -- REVISED Day Feb. 27 Peak flows of interest during Water Year 1997: Peak Discharge (cfs) Day Peak Discharge (cfs) 250 Sept. 11 1,000 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 11 165 12 14 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 44 28 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 0 0 44 0 0 0 0 0 0 179 MEAN 0 0 0 0 2 0 0 0 0 0 0 6 MAX 0 0 0 0 250 0 0 0 0 0 0 1000 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 87 0 0 0 0 0 0 355 -----------------------------------------------------------------------------WTR YR 1997 TOTAL 223 MEAN 1 MAX 1000 MIN 0 AC_FT 442 Revised due to error in low end of rating curve after datum change in WY 1997. Surface Water Streamflow Data Page 32 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 4833 Cave Creek @ Cactus Drainage Area: 33.6 mi2 below Cave Buttes Dam Period of Record: 06/21/91 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Feb. 4 Peak flows above weir (10 ft gage height) during Water Year 1998: Day Peak Discharge (cfs) Peak Discharge (cfs) 580 July 6 1,040 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 32 2 19 3 3 4 176 1 5 201 1 6 94 15 7 7 14 225 8 5 24 143 1 9 1 129 76 10 2 1 102 46 11 1 3 87 27 14 12 1 34 14 4 13 10 7 1 14 3 5 15 185 2 3 16 232 1 2 31 17 165 2 5 18 229 9 1 19 154 7 20 74 4 21 43 2 22 86 15 1 23 40 3 24 5 44 25 1 192 26 201 73 27 53 68 28 2 25 29 135 30 206 31 93 -----------------------------------------------------------------------------TOTAL 0 0 147 5 2466 602 54 0 0 587 39 24 MEAN 0 0 5 0 88 19 2 0 0 19 1 1 MAX 0 0 117 4 577 225 44 0 0 1040 44 39 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 292 10 4892 1194 107 0 0 1165 78 47 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 3925 MEAN 11 MAX 1040 MIN 0 AC_FT 7786 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. Weir flow begins into main channel above 10 ft gage height. Flood Flow Frequency for inflow to sediment basin (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 33 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 4903 Cave Buttes Outlet Drainage Area: 191 mi2 at Cave Buttes Dam Period of Record: Nov. 1987 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Feb. 4 Feb. 17 Mar. 29 Peak flows of interest during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) 180 190 200 Feb. 15 Feb. 25 220 230 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 105 5 115 6 7 8 9 10 49 11 16 12 13 14 15 167 9 16 120 52 17 37 18 103 19 8 20 7 21 22 31 3 23 1 11 24 21 25 201 26 79 17 27 9 28 8 29 174 30 71 31 8 -----------------------------------------------------------------------------TOTAL 0 0 31 0 1041 286 0 0 0 0 61 0 MEAN 0 0 1 0 37 9 0 0 0 0 2 0 MAX 0 0 106 0 225 201 0 0 0 0 150 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 62 0 2066 567 0 0 0 0 120 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 1419 MEAN 4 MAX 225 MIN 0 AC_FT 2815 Note: This is the outflow from Cave Buttes Dam. See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 34 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 4918 Cave Cr nr Cave Cr Drainage Area: 121 mi2 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 1997 to September 1998 Peak flows of interest during Water Year 1998: Day Peak Discharge (cfs) Peak Discharge (cfs) Day Feb. 4 Feb. 15 Mar. 29 230 480 1,040* Feb. 10 Feb. 25 Aug. 15 240 520 580 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 59 5 4 6 7 8 9 24 10 92 11 12 13 14 15 197 33 16 2 154 17 18 19 20 21 22 23 24 27 25 173 26 27 28 29 738* 30 31 -----------------------------------------------------------------------------TOTAL 0 0 0 0 579 738* 0 0 0 0 187 0 MEAN 0 0 0 0 21 24* 0 0 0 0 6 0 MAX 0 0 0 0 515 1040* 0 0 0 0 578 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 1149 1464* 0 0 0 0 371 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 1504* MEAN 4 MAX 1040* MIN 0 AC_FT 2984* * Maximum for 3/29/98 event from crest-stage gage. Therefore, mean daily flow and ac-ft estimated. 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 35 100-year 25,600 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: USGS Gage: 4923 Name: Cave Cr.@ SpurCross Cave Creek below Cottonwood Creek, ID# 09512280 Drainage Area: 82.7 mi2 See USGS Water-Data Report AZ-98-1 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 36 100-year 19,700 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5093 Centennial @ Wenden Drainage Area: 586 mi2 excluding area diverted from Sols Wash at Sols Tank Period of Record: 9/16/98 to current year* Discharge, in cfs, Water Year October 1997 to September 1998 No flow since installation during Water Year 1998. OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------TOTAL ----------------------0 MEAN ----------------------0 MAX ----------------------0 MIN ----------------------0 AC_FT ----------------------0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 * Gage installed 9/16/98. Surface Water Streamflow Data Page 37 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: USGS Gage: 5103 Name: Centennial Railroad Centennial Wash at SPRR, near Arlington, ID# 09517490 Drainage Area: 1,817 mi2 See USGS Water-Data Report AZ-98-1 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 38 100-year 74,400 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5113 Saddleback FRS Drainage Area: 29.6 mi2 excluding area brought in from Harquahala FRS Period of Record: 12/16/88 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Sept. 9 Peak outflows occurred only on following day during Water Year 1998: Peak Discharge (cfs) 15 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 1 10 11 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 0 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 0 1 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 1 MEAN 0 MAX 15 MIN 0 AC_FT 1 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 39 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5128 Harquahala FRS Drainage Area: 102.3 mi2 Period of Record: 03/01/94 to current year Discharge, in cfs, Water Year October 1997 to September 1998 No ungated outflow occurred during Water Year 1998. 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 1998 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 40 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5153 Narrows Dam Drainage Area: 684 mi2 Period of Record: 09/01/94 to 05/09/96; 04/29/97 to 03/12/98* Discharge, in cfs, Water Year October 1997 to September 1998 No outflows of during Water Year 1998.* 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 1998 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 * Gage removed after demolition of dam following dam failure on September 26, 1997. Surface Water Streamflow Data Page 41 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5203 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 1997 to September 1998 Day Feb. 8 No outflow during Water Year 1998 except on following day: Peak Discharge (cfs) 1 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 1 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 1998 TOTAL 0 MEAN 0 MAX 1 MIN 0 AC_FT 0 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 42 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5208 Buckeye FRS #2 Drainage Area: 5.7 mi2 without area from Buckeye FRS #3 Period of Record: 11/11/92 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Peak outflows greater than 10 cfs during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) Day Feb. 24 31 Aug. 11 18 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 2 10 11 3 12 6 13 2 14 15 1 16 17 1 18 19 20 21 22 1 23 24 5 25 1 26 27 28 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 1 0 10 0 0 0 0 0 10 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 3 0 31 0 0 0 0 0 18 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 1 0 19 0 0 0 0 0 20 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 20 MEAN 0 MAX 31 MIN 0 AC_FT 41 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 43 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: USGS Gage: 5223 Name: Hassy nr Morristown Hassayampa River near Morristown, ID# 09516500 Drainage Area: 796 mi2 See USGS Water-Data Report AZ-98-1 for data for this site. Flood Flow Frequency (based on HECWRC implementation of Bulletin 17B, n = 44, expected probability shown since it plots graphically closer to the observed data) 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 2,920 10,200 18,400 29,200 47,500 64,700 Surface Water Streamflow Data Page 44 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5228 Hassayampa @ US 60 Drainage Area: 711 mi2 Period of Record: 03/14/94 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Peak flows of interest during Water Year 1998: Peak Discharge (cfs) Day Mar. 29 600* 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 1998 TOTAL 0 MEAN 0 MAX 600* MIN 0 AC_FT 0 * Maximum estimated from high water marks. Therefore, no mean values or volumes given. Gage separated from low flow channel most of year. 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 45 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5233 Sunset FRS Drainage Area: 0.95 mi2 (from Wickenburg ADMS) Period of Record: 02/12/89 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Peak outflows of interest during Water Year 1998 assumming outlet gate fully open: Peak Discharge (cfs) Day Peak Discharge (cfs) Day Aug. 12 19 Aug. 13 20 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 22 5 11 12 3 2 20 2 10 13 3 19 7 1 10 12 4 17 11 14 8 11 2 5 14 12 15 5 11 6 2 11 14 3 11 7 12 11 13 5 10 8 13 10 13 5 9 15 9 12 10 16 5 7 14 10 12 12 16 4 5 13 11 11 14 15 4 2 12 12 11 13 15 4 6 13 13 10 12 14 4 11 7 19 14 8 12 13 2 10 9 15 15 5 11 14 4 10 3 2 16 5 11 14 2 9 17 4 10 15 7 2 18 5 10 17 4 5 4 19 3 9 16 5 2 1 20 4 8 16 5 11 21 5 6 16 5 11 22 15 15 4 11 23 14 14 2 11 24 14 14 2 9 1 25 13 14 4 2 26 12 13 11 27 11 12 12 28 11 11 12 29 11 13 30 10 13 31 8 12 -----------------------------------------------------------------------------TOTAL 95 0 238 207 362 189 163 19 0 59 110 5 MEAN 3 0 8 7 13 6 5 1 0 2 4 0 MAX 22 0 15 14 17 13 13 11 0 13 20 13 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 187 0 473 411 718 375 322 38 0 117 219 10 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 1448 MEAN 4 MAX 22 MIN 0 AC_FT 2871 Note: Outflow based on assumption that the outlet gate is fully open. See also Pool Level and Storage Volume Data. Impoundment in first week of Oct. remaining from 09/26/97 event. Surface Water Streamflow Data Page 46 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5248 Sunnycove FRS Drainage Area: 0.98 mi2 (from Wickenburg ADMS) Period of Record: Nov. 1987 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Peak outflows of interest during Water Year 1998 assumming outlet gate fully open: Peak Discharge (cfs) Day Peak Discharge (cfs) Day Aug. 12 21 Aug. 13 22 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 4 13 21 14 9 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 34 0 MEAN 0 0 0 0 0 0 0 0 0 0 1 0 MAX 0 0 0 0 0 0 0 0 0 0 22 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 68 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 34 MEAN 0 MAX 22 MIN 0 AC_FT 68 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 47 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5283 Hassayampa R @ I-10 Drainage Area: approximately 1,450 mi2 Period of Record: 11/09/94 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Peak flows of interest during Water Year 1998: Day Peak Discharge (cfs) Peak Discharge (cfs) Day Feb. 9 Mar. 29 330* 160* Feb. 15 290* Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 23 9 152 10 11 12 13 14 15 18 16 17 18 19 20 21 22 23 24 25 26 27 28 29 8 30 8 31 -----------------------------------------------------------------------------TOTAL 0 0 ----193 16 0 0 0 0 0 0 MEAN 0 0 ----7 1 0 0 0 0 0 0 MAX 0 0 ----- 333* 155* 0 0 0 0 0 0 MIN 0 0 ----0 0 0 0 0 0 0 0 AC_FT 0 0 ----382 32 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 209 MEAN 1 MAX 333* MIN 0 AC_FT 414 * Peak flows estimated from combination of PT and crest stage gage readings which indicated twodimensional flow in multiple channels for these events. Volumes and means considered gross estimations. Data reliablitity should be considered very poor. 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 48 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5308 Hassy @ Box Canyon Drainage Area: 416 mi2 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 1997 to September 1998 Day Peak flows of interest during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) Feb. 15 580 Mar. 29 1,250 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 73 346 2 70 407 3 61 391 4 32 57 335 5 59 57 342 6 33 57 329 7 12 66 323 8 16 68 302 9 216 60 293 10 148 54 290 11 92 51 291 12 68 46 305 13 54 49 344 14 41 57 293 15 191 62 273 16 114 70 250 17 102 83 225 18 153 83 115 19 136 83 20 118 86 21 143 70 22 115 60 23 102 51 24 101 54 25 174 49 26 127 103 27 108 182 28 94 170 29 742 30 463 31 370 -----------------------------------------------------------------------------TOTAL 0 0 0 0 2547 3608 5456 0 0 0 0 0 MEAN 0 0 0 0 91 116 182 0 0 0 0 0 MAX 0 0 0 0 583 1254 473 0 0 0 0 0 MIN 0 0 0 0 0 43 0 0 0 0 0 0 AC_FT 0 0 0 0 5052 7157 10821 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 11611 MEAN 32 MAX 1254 MIN 0 AC_FT 23030 Note: Streamflow continued after April 18. Channel scoured very low during the prolonged flows and/or as a result of the March 29 flood. Consequently, many days of low flow not recorded by gage. As of May 1998 about 180 cfs pass below the instrument before detection. 2-year 4,020 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 5-year 10-year 20-year 50-year 12,200 21,200 32,900 53,000 Surface Water Streamflow Data Page 49 100-year 72,200 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5353 Hassy @ Wagoner Rd Drainage Area: 78 mi2 Period of Record: 09/26/91 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Peak flows of interest during Water Year 1998: Day Peak Discharge (cfs) Peak Discharge (cfs) Apr. 1 Apr. 12 310 180 Apr. 3 July 5 210 100 Daily Mean Values* DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 14 1 1 2 1 1 199 11 14 2 14 1 1 2 1 1 233 9 12 3 14 1 1 2 1 1 182 8 13 4 7 1 1 2 8 2 183 9 15 5 1 1 1 2 1 3 151 6 12 12 6 1 1 1 1 1 9 139 12 15 7 1 1 1 1 1 31 133 9 12 8 1 1 2 1 2 14 126 12 11 9 1 1 1 1 2 11 118 12 13 10 1 1 1 2 1 8 117 11 12 11 1 1 1 1 1 8 120 13 13 12 1 1 1 1 1 9 136 15 10 13 1 1 1 1 1 11 121 19 9 14 1 1 1 1 1 14 96 13 7 15 1 1 1 1 9 29 85 4 13 8 16 1 1 1 1 1 25 37 12 14 10 17 1 1 1 1 1 20 11 16 7 18 1 1 1 1 1 25 13 14 8 19 1 1 1 1 1 22 15 11 8 20 1 1 1 1 1 11 16 9 9 21 1 1 2 1 1 7 16 9 10 22 1 1 4 1 1 6 17 9 11 23 1 1 2 1 1 6 22 10 9 24 1 1 1 1 1 6 16 12 9 25 1 1 1 1 2 7 11 18 9 26 1 1 1 1 1 21 9 13 11 27 1 1 1 1 1 35 10 10 9 28 1 1 2 1 1 65 14 10 9 29 1 1 2 1 157 15 9 10 30 1 1 2 1 162 12 9 9 31 1 2 1 160 13 13 -----------------------------------------------------------------------------TOTAL 76 30 42 42 47 887 2175 0 0 231 364 312 MEAN 2 1 1 1 2 29 72 0 0 7 12 10 MAX 14 1 12 4 40 167 305 0 0 102 140 25 MIN 1 1 1 1 1 1 0 0 0 0 0 1 AC_FT 150 60 84 84 93 1760 4313 0 0 458 722 618 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 4206 MEAN 12 MAX 305 MIN 0 AC_FT 8342 *Note: From 10/1/97 to 7/15/98 the instrument was a pressure transducer at this location that was often buried by sand and separated from the normal low base flow. Typically this base flow is on the order of 1-10 cfs. The instrument was changed to an acoustic sensor located on the bridge deck on 7/15/98. The acoustic sensor has proved to be highly influenced by temperature. No adequate solution was reached during WY 1998. Therefore, the mean daily flows shown here should be considered gross estimations. 2-year 595 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 1,590 2,580 3,780 5,730 Surface Water Streamflow Data Page 50 100-year 7,490 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Drainage Area: Name: 5403 Agua Fria @ Buckeye 2,241 mi2, 1,459 mi2 controlled by New Waddell Dam, 191 mi2 by Cave Buttes Dam, 90 mi2 by Adobe Dam, and 164 mi2by New River Dam, 247 mi2 by McMicken Dam Period of Record: 10/12/88 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Peak flows of interest occurred on following day during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) Day Feb. 15 Feb. 24 500 410 Feb. 18 Mar. 30 680 460 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 2 3 4 11 5 89 6 7 10 8 3 9 37 10 11 12 13 14 15 95 16 190 17 121 18 586 19 166 20 21 22 23 24 71 25 71 26 115 27 24 28 29 42 30 380 31 112 -----------------------------------------------------------------------------TOTAL 0 0 0 0 1576 533 2 0 0 13 0 0 MEAN 0 0 0 0 56 17 0 0 0 0 0 0 MAX 0 0 0 0 679 456 12 0 0 78 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 3126 1058 5 0 0 26 0 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 2125 MEAN 6 MAX 679 MIN 0 AC_FT 4214 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 51 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5408 Colter @ El Mirage Drainage Area: 3.48 mi2 Period of Record: 06/29/94 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Feb. 15 Sept. 11 Peak flows greater than 30 cfs during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) 36 43 Feb. 17 31 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 7 5 9 6 1 7 5 2 1 8 3 9 8 10 1 11 15 12 4 13 14 15 16 16 2 17 7 18 16 19 2 1 20 1 21 22 23 24 1 25 26 27 28 29 30 8 31 -----------------------------------------------------------------------------TOTAL 0 0 5 0 71 8 0 0 0 4 3 19 MEAN 0 0 0 0 3 0 0 0 0 0 0 1 MAX 0 0 10 0 36 10 0 0 0 16 22 43 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 10 0 140 16 0 0 0 8 7 38 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 110 MEAN 0 MAX 43 MIN 0 AC_FT 219 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 52 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5413 Dysart Drain @ LAFB Drainage Area: 52 mi2 Period of Record: 08/22/96 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Peak flows of interest during Water Year 1998: Peak Discharge (cfs) Day Feb. 17 190 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 1 2 3 4 8 5 2 1 6 1 7 2 1 8 9 3 10 1 11 1 1 3 12 13 1 14 15 8 16 17 34 18 24 19 20 1 21 1 22 1 23 24 2 25 26 27 28 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 3 0 82 0 4 2 3 2 1 3 MEAN 0 0 0 0 3 0 0 0 0 0 0 0 MAX 0 0 11 0 189 2 6 3 2 19 17 27 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 5 0 162 1 7 3 6 4 1 6 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 99 MEAN 0 MAX 189 MIN 0 AC_FT 196 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 53 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5418 White Tanks #3 FRS Drainage Area: 20.5 mi2 (White Tanks ADMS) Period of Record: Nov. 1987 to current year Discharge, in cfs, Water Year October 1997 to September 1998 No outflows during Water Year 1998.* 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 1998 TOTAL 47 MEAN 0 MAX 64 MIN 0 AC_FT 94 * Gated outlet assumed closed. See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 54 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5423 Dysart Chnl @ El Mir Drainage Area: 58.2 mi2 Period of Record: 06/23/94 to 12/26/95;03/07/97 to current year.* Discharge, in cfs, Water Year October 1997 to September 1998 Peak flows of interest during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) Day Feb. 15 Sept. 11 60 50 Feb. 17 280 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 12 5 1 6 7 1 1 8 9 3 10 11 4 12 13 14 15 13 16 17 49 18 38 19 20 21 22 23 24 1 25 26 27 28 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 0 0 115 0 0 0 0 1 1 4 MEAN 0 0 0 0 4 0 0 0 0 0 0 0 MAX 0 1 1 0 278 1 0 0 0 28 34 53 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 1 0 0 229 0 0 0 0 1 2 8 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 122 MEAN 0 MAX 278 MIN 0 AC_FT 241 * 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 55 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5438 McMicken Floodway Drainage Area: approximately 305 mi2 Period of Record: 09/03/92 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Peak flows of interest during Water Year 1998: Day Peak Discharge (cfs) Peak Discharge (cfs) Day Feb. 17 50 Aug. 8 30 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 1 2 3 4 4 5 2 6 7 1 8 7 9 5 10 11 12 13 14 15 8 16 3 17 20 18 18 19 6 20 21 22 3 23 24 3 25 5 26 27 28 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 3 0 74 0 1 0 0 0 7 0 MEAN 0 0 0 0 3 0 0 0 0 0 0 0 MAX 0 0 7 0 53 0 6 0 0 0 33 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 6 0 147 0 3 0 0 0 15 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 86 MEAN 0 MAX 53 MIN 0 AC_FT 170 Note: Flows during Water Year 1998 generated below McMicken Dam. No outflow occurred from McMicken Dam into the floodway during Water Year 1998. 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 56 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5448 McMicken Dam Drainage Area: 247 mi2 Period of Record: Nov. 1987 to current year Discharge, in cfs, Water Year October 1997 to September 1998 No outflow during Water Year 1998. 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 1998 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 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: USGS Gage: 5503 Name: Agua Fria @ Grand Agua Fria at El Mirage, ID# 09513650 Drainage Area: 1,628 mi2 of which 1,433 mi2 is controlled by New Waddel Dam See USGS Water-Data Report AZ-98-1 for data for this site. Surface Water Streamflow Data Page 58 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: USGS Gage: 5508 Name: NewRiver @ Glendale New River near Glendale, AZ, ID# 09513910 Drainage Area: 600 mi2 of which 191 mi2 is controlled by Cave Buttes Dam, 164 mi2 by New River Dam, and 90 mi2 by Adobe Dam See USGS Water-Data Report AZ-98-1 for data for this site. Surface Water Streamflow Data Page 59 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5523 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 1997 to September 1998 Peak flows of interest during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) Day Feb. 4 Mar. 26 Discharge (cfs) 800 710 530 Feb. 15 July 6 660 2,150* Streamflow in the ACDC at 67th Ave. for February 1998 3-hour Maximum Discharges 600 400 200 0 2/1/98 0:00 2/8/98 0:00 2/15/98 0:00 2/22/98 0:00 3/1/98 0:00 Flood of July 6-7, 1998 on the ACDC at 67th Ave. 15-minute Maximum Discharges Discharge (cfs) 2,500 2,000 1,500 1,000 500 0 7/6/98 18:00 7/7/98 0:00 7/7/98 6:00 7/7/98 12:00 7/7/98 18:00 Date Time Continued on the following page. Surface Water Streamflow Data Page 60 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5523 ACDC @ 67 Av (cont.) 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 1997 to September 1998 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 1 1 38 2 21 3 1 4 9 2 4 11 362 2 15 5 11 286 7 4 6 1 101 1 2 134 4 7 7 1 76 23 8 1 426 6 8 24 60 1 96 11 2 9 8 152 17 10 1 26 47 12 6 11 4 1 18 48 10 96 12 4 4 19 17 9 13 13 11 4 3 1 14 6 3 1 2 15 1 267 17 16 4 211 7 64 5 17 1 198 1 18 18 218 4 19 3 19 91 1 20 7 39 21 1 3 23 3 22 12 141 13 1 2 11 23 54 8 3 24 13 137 25 5 198 1 2 26 217 207 27 80 74 28 14 44 29 90 30 213 31 83 -----------------------------------------------------------------------------TOTAL 14 15 334 81 2826 753 91 11 0 737 104 170 MEAN 0 1 11 3 101 24 3 0 0 24 3 6 MAX 21 16 225 83 709 529 77 10 0 2152* 128 358 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 28 30 663 160 5606 1493 180 22 1 1461 206 337 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 5136 MEAN 14 MAX 2152* MIN 0 AC_FT 10187 * Maximum discharge for period of record. 2-year 1,900 Flood Flow Frequency (computed from USACE design information) 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 61 100-year 29,000 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5538 Adobe Dam Outlet Drainage Area: 89.6 mi2 at Adobe Dam Period of Record: Nov. 1987 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Feb. 4 Feb. 18 Peak flows of interest during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) 140 300 Feb. 15 Feb. 25 280 100 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 49 5 28 6 2 7 1 8 9 10 11 12 13 14 15 127 16 23 17 27 18 167 19 9 20 1 21 22 23 24 25 50 26 8 27 1 28 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 0 0 495 0 0 0 0 1 0 0 MEAN 0 0 0 0 18 0 0 0 0 0 0 0 MAX 0 0 0 0 303 0 0 0 0 6 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 981 0 0 0 0 1 0 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 495 MEAN 1 MAX 303 MIN 0 AC_FT 983 See also Pool Level and Storage Volume data for Adobe Dam. Surface Water Streamflow Data Page 62 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5543 Scatter Wash Drainage Area: 18.1 mi2 Period of Record: 09/18/96 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day July 6 Sept. 11 Peak flows greater than 1.0 ft gage height during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) 430 440 July 7 480 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 2 3 4 * 5 6 42 7 194 4 8 13 3 9 1 10 11 90 12 1 13 14 15 133 9 16 8 17 45 1 18 29 19 20 21 22 23 24 35 25 36 26 57 27 1 28 2 16 29 19 30 7 31 -----------------------------------------------------------------------------TOTAL 1 1 1 1 401 102 3 1 1 250 26 92 MEAN 0 0 0 0 14 3 0 0 0 8 1 3 MAX 0 0 0 0 208 242 7 0 0 475 186 444 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 2 2 2 2 795 203 6 2 2 497 52 183 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 881 MEAN 2 MAX 475 MIN 0 AC_FT 1747 * Event peak from high water marks for 2/4/98 = 150 cfs. No mean values reported. 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 63 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: USGS Gage: 5568 Name: Skunk Creek @ I-17 Skunk Creek near Phoenix, AZ, ID# 09513860 Drainage Area: 64.9 mi2 See USGS Water-Data Report AZ-98-1 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 64 100-year 22,800 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5583 Skunk Cr. nr New R. Drainage Area: approximately 4 mi2 Period of Record: 06/21/95 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Feb. 15 July 23 Peak flows greater than 1.0 ft gage height during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) 70 150 Mar. 26 50 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 4 2 2 3 4 4 5 1 6 7 8 9 3 10 11 12 13 14 15 6 16 17 6 18 5 19 20 21 22 1 2 23 5 24 5 25 4 26 9 27 28 5 29 8 30 9 31 -----------------------------------------------------------------------------TOTAL 0 0 1 0 34 32 6 0 0 7 0 0 MEAN 0 0 0 0 1 1 0 0 0 0 0 0 MAX 0 0 9 5 67 51 12 0 0 154 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 3 1 67 64 13 0 0 14 0 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 82 MEAN 0 MAX 154 MIN 0 AC_FT 162 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 65 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5598 New River @ Bell Drainage Area: 185 mi2 of which 164 mi2 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 1997 to September 1998 Peak flows greater than 0.75 ft gage height during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) Day Feb. 15 Feb. 25 280 240 Feb. 18 Mar. 29 270 470 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 70 2 31 3 28 4 8 5 6 2 6 7 4 8 9 10 115 11 99 12 41 13 4 14 15 116 16 198 17 121 18 233 19 151 20 100 21 53 22 37 23 15 24 25 129 26 157 27 90 5 28 37 67 29 331 30 264 31 144 -----------------------------------------------------------------------------TOTAL 0 0 0 0 1698 811 136 0 0 11 0 0 MEAN 0 0 0 0 61 26 5 0 0 0 0 0 MAX 0 0 0 0 283 465 117 0 0 117 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 3368 1608 270 0 0 22 0 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 2656 MEAN 7 MAX 465 MIN 0 AC_FT 5268 * 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. Note: Most flows represent outflow from New River Dam. 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 66 100-year 41,800 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5613 New River Outlet Drainage Area: 164 mi2 at New River Dam Period of Record: Nov. 1987 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Feb. 5 Feb. 15 Feb. 25 Peak flows of interest during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) 160 350 280 Feb. 10 Feb. 18 Mar. 29 240 330 590 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 19 111 2 7 65 3 4 59 4 3 36 5 92 1 14 6 66 7 7 7 4 8 3 3 9 25 2 10 210 11 130 12 54 13 8 14 4 15 208 16 224 17 146 18 291 19 191 20 131 21 87 22 58 23 20 24 19 25 228 26 193 27 119 82 28 63 107 29 497 30 346 31 204 -----------------------------------------------------------------------------TOTAL 0 0 0 0 2578 1270 302 0 0 0 0 0 MEAN 0 0 0 0 92 41 10 0 0 0 0 0 MAX 0 0 0 0 350 591 157 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 5114 2519 599 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 4150 MEAN 11 MAX 591 MIN 0 AC_FT 8232 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 67 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5968 StoneRidge Dam Drainage Area: 0.86 mi2 Period of Record: 12/11/96 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Feb. 24 Peak flows greater than 0.75 ft gage height during Water Year 1998: Peak Discharge (cfs) 16 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 4 18 4 19 4 20 4 21 4 22 4 23 4 24 2 25 4 26 2 27 4 28 1 29 1 30 31 -----------------------------------------------------------------------------TOTAL 0 0 0 0 35 8 2 0 0 0 0 0 MEAN 0 0 0 0 1 0 0 0 0 0 0 0 MAX 0 0 0 0 16 6 4 0 0 0 0 4 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 70 15 4 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 45 MEAN 0 MAX 16 MIN 0 AC_FT 90 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 68 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5973 SunRidge Canyon Dam Drainage Area: 1.6 mi2 Period of Record: 02/04/97 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Feb. 24 Peak outflows of interest during Water Year 1998: Peak Discharge (cfs) 33 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 3 2 15 3 4 5 6 7 8 9 10 11 12 13 14 15 7 16 9 17 9 18 19 20 21 22 23 24 5 25 26 1 27 3 28 18 29 18 30 15 31 9 -----------------------------------------------------------------------------TOTAL 0 0 0 0 12 82 18 0 0 0 0 0 MEAN 0 0 0 0 0 3 1 0 0 0 0 0 MAX 0 0 0 0 33 21 18 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 24 163 36 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 112 MEAN 0 MAX 33 MIN 0 AC_FT 223 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 69 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Drainage Area: Name: 5978 GoldenEaglePark Dam 7.13 mi2 of which 2.02 mi2, 2.13 mi2, and 1.6 mi2 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 1997 to September 1998 Day Feb. 4 Feb. 24 Peak outflows above 3 ft gage height during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) 92 110 Feb. 15 84 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 7 2 3 3 4 26 5 17 6 7 9 8 15 8 9 16 10 1 11 12 13 14 15 10 1 16 17 12 18 7 19 20 21 22 6 23 24 22 25 5 26 17 27 6 28 6 29 5 30 11 31 -----------------------------------------------------------------------------TOTAL 0 0 30 4 123 45 8 0 0 0 1 0 MEAN 0 0 1 0 4 1 0 0 0 0 0 0 MAX 0 0 70 16 110 52 72 0 0 0 23 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 60 8 244 89 15 0 0 0 3 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 211 MEAN 1 MAX 110 MIN 0 AC_FT 418 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 70 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5983 North Heights Dam Drainage Area: 2.13 mi2 Period of Record: 10/11/96 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Dec. 8 Peak outflows greater than 50 cfs during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) 55 Mar. 26 51 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 8 2 4 3 3 4 14 5 15 6 7 2 8 14 5 9 1 15 10 3 11 12 13 14 15 10 16 1 17 8 18 10 19 2 20 21 22 8 23 3 1 24 12 1 25 11 26 13 27 2 6 28 7 29 11 30 4 31 -----------------------------------------------------------------------------TOTAL 0 0 30 0 108 41 15 0 0 2 0 0 MEAN 0 0 1 0 4 1 1 0 0 0 0 0 MAX 0 0 55 0 49 51 46 0 0 3 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 60 0 215 81 30 0 0 3 0 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 196 MEAN 1 MAX 55 MIN 0 AC_FT 389 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 71 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5988 Aspen Dam Drainage Area: 2.02 mi2 Period of Record: 01/02/97 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Dec. 7 Peak outflows of interest during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) 25 Feb. 4 30 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 3 5 6 7 2 8 1 1 9 1 10 11 12 13 14 15 1 16 17 1 18 19 20 21 22 23 24 4 25 26 27 1 28 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 3 0 10 3 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 25 0 30 10 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 6 0 21 6 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 17 MEAN 0 MAX 30 MIN 0 AC_FT 33 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 72 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 5993 Hesperus Dam Drainage Area: 2.91 mi2 Period of Record: 12/18/96 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Mar. 26 Peak outflows greater than 1.5 ft gage height during Water Year 1998: Peak Discharge (cfs) 19 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 1 1 9 10 6 11 12 13 14 15 2 16 17 18 19 20 21 22 23 24 6 25 26 2 27 28 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 1 0 16 2 0 0 0 0 0 0 MEAN 0 0 0 0 1 0 0 0 0 0 0 0 MAX 0 0 17 0 16 19 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 2 0 32 4 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 19 MEAN 0 MAX 19 MIN 0 AC_FT 38 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 73 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 6503 Guadalupe FRS Drainage Area: 1.87 mi2 Period of Record: 06/29/89 to current year Discharge, in cfs, Water Year October 1997 to September 1998 No outflow during Water Year 1998.* 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 1998 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 * Gated outlet assumed closed. See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 74 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 6563 South Mountain Fan Drainage Area: 1.98 mi2 Period of Record: 06/09/93 to current year Revised Records: WY1996: WY1995 Discharge, in cfs, Water Year October 1997 to September 1998 No flow during Water Year 1998: 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 1998 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 75 100-year 2,400 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 6573 EMF @ Broadway Drainage Area: 15.4 mi2 Period of Record: 08/10/89 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Feb. 9 Peak outflows of interest during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) 440 Aug. 1 320 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 76 2 4 3 4 24 5 3 6 7 8 11 9 149 10 11 1 12 13 14 15 2 16 17 18 6 1 19 20 2 21 1 22 23 24 2 25 1 26 27 28 29 30 3 31 -----------------------------------------------------------------------------TOTAL 0 0 0 1 202 3 0 0 0 0 80 0 MEAN 0 0 0 0 7 0 0 0 0 0 3 0 MAX 0 0 0 4 441 13 0 0 0 0 315 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 2 401 5 0 0 0 0 159 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 286 MEAN 1 MAX 441 MIN 0 AC_FT 567 Surface Water Streamflow Data Page 76 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 6583 EMF @ Queen Creek Drainage Area: 104.6 mi2 Period of Record: 01/18/89 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Feb. 9 Peak flows greater than 1.0 ft gage height during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) 60 Mar. 30 150 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 3 29 2 1 19 3 1 13 4 9 5 6 6 7 3 8 1 9 23 10 31 11 13 12 4 13 1 1 14 2 15 16 11 17 15 18 13 19 10 20 10 21 10 22 14 23 6 24 3 2 25 19 26 18 27 11 28 5 29 30 65 31 66 -----------------------------------------------------------------------------TOTAL 0 0 1 3 227 137 69 0 0 2 0 0 MEAN 0 0 0 0 8 4 2 0 0 0 0 0 MAX 0 0 3 3 61 151 33 0 0 7 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 2 7 449 272 137 0 0 5 0 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 440 MEAN 1 MAX 151 MIN 0 AC_FT 872 Surface Water Streamflow Data Page 77 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 6598 EMF @ Arizona Ave. Drainage Area: 214 mi2 at Hunt Hwy 8 mi upstream Period of Record: 02/10/89 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Feb. 10 Apr. 1 Peak outflows of interest during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) 50 90 Feb. 11 Apr. 2 50 50 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 5 41 2 34 3 18 4 17 5 6 7 8 9 10 10 11 45 12 34 13 21 14 15 16 17 18 19 16 20 6 21 22 1 23 24 25 26 27 15 28 17 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 0 0 183 5 92 0 0 0 0 0 MEAN 0 0 0 0 7 0 3 0 0 0 0 0 MAX 0 0 0 0 51 0 86 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 362 11 183 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 280 MEAN 1 MAX 86 MIN 0 AC_FT 556 Surface Water Streamflow Data Page 78 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 6603 Guadalupe Channel Drainage Area: 13.7 mi2 (discharge under US 60 limited to 1,800 cfs; drainage area downstream of US 60 about 1.5 mi2 (1.2 mi2 east of Sossamon Road & south of US 60) Period of Record: 08/07/98 to current year* Discharge, in cfs, Water Year October 1997 to September 1998 No flow above instrument since installation during Water Year 1998.** Daily Mean Values OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------TOTAL --------------------0 0 MEAN --------------------0 0 MAX --------------------0 0 MIN --------------------0 0 AC_FT --------------------0 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 * ** Gage installed 8/7/98. About 50 cfs passes station before detected by instrument. Flood Flow Frequency (from design sheets) Magnitude and Probability of Instantaneous Peak Flow Discharge, in cfs, for Indicated Recurrence Interval 100-year 2,400 Surface Water Streamflow Data Page 79 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 6628 Signal Butte FRS Drainage Area: 16.4 mi2 not including area from Apache Junction FRS Period of Record: 11/10/87 to current year Discharge, in cfs, Water Year October 1997 to September 1998 No outflow during Water Year 1998.* 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 1998 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 * No outflow through the principle outlet. However, some impoundment was experienced during Water Year 1998. See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 80 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 6673 Apache Jct. FRS Drainage Area: 5.8 mi2 Period of Record: Nov. 1987 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Feb. 24 Peak outflows greater than 20 cfs during Water Year 1998: Peak Discharge (cfs) 21 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 12 13 14 15 9 16 6 17 18 19 20 5 21 4 22 2 23 24 6 25 8 26 27 28 1 29 30 6 31 -----------------------------------------------------------------------------TOTAL 2 0 1 0 40 6 0 0 0 0 1 0 MEAN 0 0 0 0 1 0 0 0 0 0 0 0 MAX 14 0 7 0 21 13 0 0 0 0 6 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 3 0 3 0 80 12 0 0 0 0 1 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 50 MEAN 0 MAX 21 MIN 0 AC_FT 99 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 81 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 6683 Powerline FRS Drainage Area: 49.9 mi2 Period of Record: 12/03/92 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Feb. 4 Peak outflows of interest during Water Year 1998: Peak Discharge (cfs) 6 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 2 5 2 6 7 8 9 1 10 11 12 13 14 15 2 16 2 17 18 19 20 21 1 22 2 1 23 24 1 25 26 27 28 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 2 0 12 0 0 0 0 1 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 4 0 6 0 0 0 0 2 3 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 4 0 23 0 0 0 0 2 1 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 15 MEAN 0 MAX 6 MIN 0 AC_FT 30 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 82 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 6688 Vineyard FRS Drainage Area: 57.8 mi2 Period of Record: Nov. 1987 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day July 22 Peak outflows of interest during Water Year 1998: Peak Discharge (cfs) 43 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 2 3 4 5 6 7 8 9 10 2 11 2 12 13 14 15 16 17 18 19 20 21 22 15 23 28 24 16 25 4 10 26 7 5 27 5 3 28 3 2 29 1 30 1 31 -----------------------------------------------------------------------------TOTAL 0 0 0 0 23 2 0 0 0 81 1 0 MEAN 0 0 0 0 1 0 0 0 0 3 0 0 MAX 0 0 0 0 7 2 0 0 0 43 1 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 46 5 0 0 0 161 1 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 107 MEAN 0 MAX 43 MIN 0 AC_FT 213 Note: Instrument elevation at 6 ft gage height for period 02/02/98 to 02/25/98. Therefore, no data less that 6 ft recorded during this time. Multiple events missed. Probable events occurred on 2/4, 2/9, 2/15, 2/17, 2/20, and 2/24. Data shown for 2/10-11 estimated from field observations. See also #6703. See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 83 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 6703 Rittenhouse FRS Drainage Area: 51.3 mi2 Period of Record: 09/27/88 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Feb. 9 Feb. 18 Peak outflows greater than 3.0 ft gage height during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) 56 37 Feb. 15 Feb. 24 78 50 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 5 6 7 8 4 9 35 10 4 11 1 12 13 14 15 53 16 21 17 2 18 28 19 7 20 8 21 15 22 11 2 23 1 24 16 25 26 26 3 27 1 1 28 29 30 9 31 -----------------------------------------------------------------------------TOTAL 0 0 11 0 232 10 0 0 0 1 0 0 MEAN 0 0 0 0 8 0 0 0 0 0 0 0 MAX 0 0 28 0 78 21 0 0 0 2 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 21 0 461 19 0 0 0 2 0 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 254 MEAN 1 MAX 78 MIN 0 AC_FT 504 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 84 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 6707* Queen Ck.@ Rittenhouse Period of Record: 09/14/93 to current year Discharge, in cfs, Water Year October 1997 to September 1998 No flow above gage during Water Year 1998. 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 1998 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 85 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 6738 Drainage Area: 143 mi2 Period of Record: FCDMC 1/8/98 to current year Whitlow Ranch Dam Refer to U.S. Army Corps of Engineers, Los Angeles District for official data at this site. Surface Water Streamflow Data Page 86 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 6813 Buckeye FRS #3 Drainage Area: 9.3 mi2 Period of Record: 11/23/92 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Peak outflows of interest during Water Year 1998: Peak Discharge (cfs) Day Aug. 11 44 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 5 12 4 13 14 15 1 16 17 1 18 19 20 21 22 23 24 1 25 26 27 28 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 0 0 4 0 0 0 0 0 9 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 7 0 0 0 0 0 44 2 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 9 0 0 0 0 0 18 1 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 14 MEAN 0 MAX 44 MIN 0 AC_FT 28 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 87 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 6823 White Tanks #4 FRS Drainage Area: 18.6 mi2 (White Tanks ADMS) Period of Record: Nov. 1987 to current year Discharge, in cfs, Water Year October 1997 to September 1998 No outflow during Water Year 1998. 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 1998 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 88 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: USGS Gage: 6853 Name: Gila @ Estrella Pky Gila River at Estrella Parkway, ID# 09514100 Drainage Area: 45,585 mi2 See USGS Water-Data Report AZ-98-1 for data for this site. 5-year 20,000 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 10-year 20-year 50-year 100-year 50,000 84,000 170,000 217,000 Surface Water Streamflow Data Page 89 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 6863 Gila River @ 115th Ave. Drainage Area: approximately 43,300 mi2 Period of Record: 11/6/97 to current year* Discharge, in cfs, Water Year October 1997 to September 1998 Day Apr. 3 Peak flows of interest during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) 2,100 Apr. 13 5,000 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 97 83 92 115 153 126 109 122 100 101 2 94 84 81 150 1303 123 105 121 99 98 3 95 86 80 145 1947 129 98 121 101 92 4 93 89 99 150 1678 126 102 121 98 100 5 91 91 105 155 1436 117 103 115 98 107 6 89 91 82 98 155 1324 120 106 125 100 101 7 100 104 81 99 136 1215 121 98 129 100 106 8 107 135 79 100 143 602 117 99 124 102 110 9 111 125 80 119 104 241 115 98 124 100 99 10 107 123 83 105 95 186 114 103 125 108 104 11 102 123 96 127 90 152 116 104 121 105 115 12 105 124 97 118 91 1247 115 108 117 107 108 13 120 126 95 102 91 3266 113 110 118 103 110 14 120 106 95 99 91 3876 112 114 118 97 112 15 120 92 93 113 93 2681 110 119 115 97 103 16 120 86 93 109 97 1235 110 120 105 99 104 17 120 85 92 115 95 374 111 120 96 110 98 18 120 85 92 118 109 182 112 121 95 102 97 19 120 85 94 118 109 150 109 124 94 101 108 20 103 88 94 103 91 141 103 125 112 100 128 21 99 92 108 103 98 135 104 124 92 100 143 22 106 95 93 108 133 130 109 121 93 99 139 23 113 94 91 127 143 125 107 121 100 100 142 24 109 90 92 123 150 121 106 131 100 103 138 25 96 84 95 121 156 111 112 117 99 102 130 26 97 80 94 113 161 111 147 120 97 101 126 27 98 88 91 107 160 115 144 123 100 104 134 28 93 87 90 106 150 116 141 125 104 101 118 29 97 91 90 150 118 147 128 98 99 102 30 95 89 91 146 124 121 129 100 101 99 31 86 90 135 105 100 103 -----------------------------------------------------------------------------TOTAL --- 3047 3024 2806 3008 3886 24592 3665 3425 3402 3141 3373 MEAN --102 98 91 107 125 820 118 114 110 101 112 MAX --142 170 136 161 209 4962 169 151 146 140 171 MIN --59 54 52 58 56 80 77 74 67 69 67 AC_FT --- 6044 5998 5565 5967 7709 48777 7269 6793 6748 6229 6690 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 57369 MEAN 164 MAX 4962 MIN 52 AC_FT 113789 * Gage installed 11/6/97. Surface Water Streamflow Data Page 90 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 6893 Estrella Fan Drainage Area: 1.0 mi2 Period of Record: 04/30/93 to current year Revised Records: WY1997: WY 1996 Discharge, in cfs, Water Year October 1997 to September 1998 Peak flows during Water Year 1998: Peak Discharge (cfs) Day Day Jan. 10 20 Peak Discharge (cfs) Sept. 11 80 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 21 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 21 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 18 0 0 0 0 0 0 0 82 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 41 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 2 MEAN 0 MAX 82 MIN 0 AC_FT 41 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 Surface Water Streamflow Data Page 91 100-year 2,710 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 6923 Sauceda Wash Drainage Area: 126 mi2 Period of Record: 02/28/90 to current year* Discharge, in cfs, Water Year October 1997 to September 1998 Peak flows of interest during Water Year 1998.** Day Peak Discharge (cfs) Peak Discharge (cfs) Day Oct. 22 Aug. 12 430 310 Feb. 9 Aug. 25 500 1,320*** Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------9 49 12 14 22 20 23 8 24 25 207 -----------------------------------------------------------------------------TOTAL 28 0 0 0 49 0 0 0 0 0 221 0 MEAN 1 0 0 0 2 0 0 0 0 0 7 0 MAX 426 0 0 0 501 0 0 0 0 0 1320*** 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 55 0 0 0 97 0 0 0 0 0 438 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 298 MEAN 1 MAX 1825 MIN 0 AC_FT 591 * 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. *** Peak discharge as computed by USGS for this event assuming partial blockage of culverts due to debris observed following the event. Unobstructed peak discharge = 1830 cfs. 2-year 530 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 5-year 10-year 20-year 50-year 1,640 2,610 3,640 5,020 Surface Water Streamflow Data Page 92 100-year 6,040 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 6983 Vekol Wash Drainage Area: 150 mi2 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 1997 to September 1998 Peak flows of interest during Water Year 1998:* Peak Discharge (cfs) Day Peak Discharge (cfs) Day July 7 1,230 Flood of July 7, 1998 on Vekol Wash 15 Minute Maximum Discharges 1,500 Discharge (cfs) 1,250 1,000 750 500 250 0 7/7/98 21:00 * 7/7/98 23:00 7/8/98 1:00 Date Time 7/8/98 3:00 See also USGS crest stage gage, 09488650, Oct. 1996 to current year. 2-year 1,600 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 5-year 10-year 25-year 50-year 100-year 3,660 5,700 9,030 12,000 15,600 Continued on following page. Surface Water Streamflow Data Page 93 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 6983 Vekol Wash (cont.) Drainage Area: 150 mi2 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 1997 to September 1998 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 25 5 1 6 21 7 61 1 8 2 32 9 78 1 10 6 11 9 12 13 14 9 15 16 17 18 19 20 21 22 6 23 2 24 25 26 27 28 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 0 0 80 0 0 0 0 102 15 57 MEAN 0 0 0 0 3 0 0 0 0 3 0 2 MAX 0 0 0 0 257 0 0 0 0 1234 126 269 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 0 0 159 0 0 0 0 203 29 113 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 254 MEAN 1 MAX 1234 MIN 0 AC_FT 504 * See also USGS crest stage gage, 09488650, Oct. 1996 to current year. Surface Water Streamflow Data Page 94 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 7013 Martinez Creek Drainage Area: 109 mi2 Period of Record: 11/23/94 to current year Discharge, in cfs, Water Year October 1997 to September 1998 No flows above instrument during Water Year 1998.* 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 1998 TOTAL 0 MEAN 0 MAX 0 MIN 0 AC_FT 0 * About 820 cfs pass below the instrument following significant scour of the channel after the 9/26/97 flood. 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 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 7043 Sols Wsh nr Matthie Drainage Area: 121 mi2 Period of Record: 08/04/95 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Peak flow of interest during Water Year 1998:* Peak Discharge (cfs) Day Aug. 12 300 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------12 57 -----------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 57 0 MEAN 0 0 0 0 0 0 0 0 0 0 2 0 MAX 0 0 0 0 0 0 0 0 0 0 299 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 0 114 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 57 MEAN 0 MAX 299 MIN 0 AC_FT 114 * About 220 cfs pass below the instrument following significant scour of the channel after the 9/26/97 flood. 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 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 7063 Hartman Wash Drainage Area: 5.4 mi2 Period of Record: 07/06/94 to current year Revised Records: WY1996: WY1995 Discharge, in cfs, Water Year October 1997 to September 1998 Peak flows of interest during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) Day July 21 Aug. 12 290 1,120 Aug. 8 220 Flood of Aug. 12, 1998 on Hartman Wash 15-minute Maximum Discharges 1,200 Discharge (cfs) 1,000 800 600 400 200 0 18:00 19:00 20:00 Time on Aug. 12, 1998 21:00 22:00 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------8 2 12 29 21 4 -----------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 4 31 0 MEAN 0 0 0 0 0 0 0 0 0 0 1 0 MAX 0 0 0 0 0 0 0 0 0 294 1120 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 8 61 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 35 MEAN 0 MAX 1120 MIN 0 AC_FT 69 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. 2-year 200 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 5-year 10-year 20-year 50-year 1,020 1,890 2,840 4,110 Surface Water Streamflow Data Page 97 100-year 4,990 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 7083 Flying E Wash Drainage Area: 8.5 mi2 (4 mi2 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 1997 to September 1998 Day Aug. 7 Peak flows of interest during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) 50 Aug. 12 170 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 2 5 6 7 3 8 1 1 9 4 10 2 11 12 2 13 14 15 1 16 17 5 18 19 20 21 3 1 22 7 23 24 25 26 27 28 29 30 31 -----------------------------------------------------------------------------TOTAL 0 0 13 2 12 0 0 0 0 2 4 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 42 32 39 0 0 0 0 42 171 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 AC_FT 0 0 25 4 24 0 0 0 0 3 7 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 32 MEAN 0 MAX 171 MIN 0 AC_FT 64 Flood Flow Frequency (based on Wickenburg ADMS HEC-1 and R. W. Cruff, 1995 graphical extension) 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 890 2,200 3,490 4,770 5,860 6,940 Surface Water Streamflow Data Page 98 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 7093 Casandro Wash Drainage Area: 0.61 mi2 Period of Record: 07/12/94 to current year Discharge, in cfs, Water Year October 1997 to September 1998 No flow except on following day during Water Year 1998: Peak Discharge (cfs) Day Aug. 12 150* Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 2* 13 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 2 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 151* 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 5 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 2* MEAN 0 MAX 151* MIN 0 AC_FT 5* * Maximum estimated from high water marks at gage. Hydrograph estimated from data at 7133. 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 20 50 200 500 Surface Water Streamflow Data Page 99 100-year 800 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 7113 Powder House Wash Drainage Area: 1.8 mi2 Period of Record: 05/18/95 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Peak flows of interest during Water Year 1998: Peak Discharge (cfs) Day Peak Discharge (cfs) Aug. 11 210 Aug. 12 130 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 11 12 13 5 25 6 24 25 2 3 31 1 -----------------------------------------------------------------------------TOTAL 0 0 0 0 0 0 0 0 0 0 41 2 MEAN 0 0 0 0 0 0 0 0 0 0 1 0 MAX 0 0 0 0 0 0 0 0 0 0 211 12 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 81 4 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 43 MEAN 0 MAX 211 MIN 0 AC_FT 85 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 1,300 Surface Water Streamflow Data Page 100 100-year 1,900 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Streamflow Station Number: Name: 7133 Casandro Dam Drainage Area: 1.3 mi2 Period of Record: 08/15/96 to current year Discharge, in cfs, Water Year October 1997 to September 1998 Day Aug. 12 Peak outflows of interest during Water Year 1998: Peak Discharge (cfs) 12 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 5 6 7 8 9 10 11 12 2 13 1 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 3 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 12 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 7 0 -----------------------------------------------------------------------------WTR YR 1998 TOTAL 3 MEAN 0 MAX 12 MIN 0 AC_FT 7 See also Pool Level and Storage Volume Data. Surface Water Streamflow Data Page 101 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: 769 Name: 2 Drainage Area: 1,780 mi Period of Record: 1/21/98 to current year Tat Momolikot Dam Refer to U.S. Army Corps of Engineers, Los Angeles District for official data for this site. Pool Level Data Page 1 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 4563 Spookhill FRS 2 Drainage Area: 13.6 mi Period of Record: Nov. 1987 to current year Depth, in feet, Water Year October 1997 to September 1998 Day Feb. 9 Mar. 30 Maximum impoundments of interest during Water Year 1998. Maximum Level (ft) Day Maximum Level (ft) 2.37 2.09 Feb. 20 Aug. 1 2.19 4.69 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.6 0.6 0.6 0.6 0.6 0.6 0.7 0.6 0.6 0.6 1.8 0.6 2 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.7 0.6 3 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 4 0.6 0.6 0.6 0.6 0.8 0.6 0.6 0.6 0.6 0.6 0.6 0.6 5 0.6 0.6 0.6 0.6 0.7 0.6 0.6 0.6 0.6 0.6 0.6 0.6 6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 7 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 8 0.6 0.6 0.6 0.6 0.7 0.6 0.6 0.6 0.6 0.6 0.6 0.6 9 0.6 0.6 0.6 0.6 1.5 0.6 0.6 0.6 0.6 0.6 0.6 0.6 10 0.6 0.6 0.6 0.6 1.0 0.6 0.6 0.6 0.6 0.6 0.6 0.6 11 0.6 0.6 0.6 0.6 0.8 0.6 0.6 0.6 0.6 0.6 0.6 0.6 12 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 13 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 14 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 15 0.6 0.6 0.6 0.6 1.1 0.6 0.6 0.6 0.6 0.6 0.6 0.6 16 0.6 0.6 0.6 0.6 1.0 0.6 0.6 0.6 0.6 0.6 0.6 0.6 17 0.6 0.6 0.6 0.6 0.9 0.6 0.6 0.6 0.6 0.6 0.6 0.6 18 0.6 0.6 0.6 0.6 1.1 0.6 0.6 0.6 0.6 0.6 0.6 0.6 19 0.6 0.6 0.6 0.6 0.9 0.6 0.6 0.6 0.6 0.6 0.6 0.6 20 0.6 0.6 0.6 0.6 1.1 0.6 0.6 0.6 0.6 0.6 0.6 0.6 21 0.6 0.6 0.6 0.6 1.4 0.6 0.6 0.6 0.6 0.6 0.6 0.6 22 0.6 0.6 0.6 0.6 0.9 0.6 0.6 0.6 0.6 0.6 0.6 0.6 23 1.0 0.6 0.6 0.6 0.7 0.6 0.6 0.6 0.6 0.6 0.6 0.6 24 0.6 0.6 0.6 0.6 0.9 0.6 0.6 0.6 0.6 0.6 0.6 0.6 25 0.6 0.6 0.6 0.6 1.3 0.6 0.6 0.6 0.6 0.6 0.6 0.6 26 0.6 0.6 0.6 0.6 1.1 0.6 0.6 0.6 0.6 0.6 0.6 0.6 27 0.6 0.6 0.6 0.6 0.9 0.6 0.6 0.6 0.6 0.6 0.6 0.6 28 0.6 0.6 0.6 0.6 0.8 0.6 0.6 0.6 0.6 0.6 0.6 0.6 29 0.6 0.6 0.6 0.6 --0.6 0.6 0.6 0.6 0.6 0.6 0.6 30 0.6 0.6 0.6 0.6 --1.5 0.6 0.6 0.6 0.6 0.6 0.6 31 0.6 --0.6 0.6 --1.3 --0.6 --0.7 0.6 -------------------------------------------------------------------------------MEAN 0.6 0.6 0.6 0.6 0.9 0.6 0.6 0.6 0.6 0.6 0.6 0.6 MAX 1.6 0.6 0.6 0.7 2.4 2.1 0.9 0.6 0.6 4.3 4.7 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 1998 MEAN 0.62 MAX 4.69 MIN 0.59 See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 2 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 4648 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 1997 to September 1998 Day Feb. 4 Maximum impoundments of interest during Water Year 1998: Maximum Level (ft) Day Maximum Level (ft) 0.82 July 6 1.20 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 4 0.1 0.1 0.1 0.1 0.3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 5 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 6 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 7 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 8 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.2 0.1 0.1 9 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 10 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 11 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 12 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 13 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 14 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 15 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 16 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 17 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 18 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 19 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 20 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 21 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 22 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 23 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 24 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 25 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 26 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 27 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 28 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 29 0.1 0.1 0.1 0.1 --0.1 0.1 0.1 0.1 0.1 0.1 0.1 30 0.1 0.1 0.1 0.1 --0.1 0.1 0.1 0.1 0.1 0.1 0.1 31 0.1 --0.1 0.1 --0.1 --0.1 --0.1 0.1 -------------------------------------------------------------------------------MEAN 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 MAX 0.1 0.1 0.1 0.1 0.8 0.1 0.1 0.1 0.1 1.2 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 1998 MEAN 0.10 MAX 1.20 MIN 0.10 See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 3 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 4653 Tatum Wash Basin 2 Drainage Area: mi Period of Record: 05/08/98 to current year* Depth, in feet, Water Year October 1997 to September 1998 No impoundments since installation during Water Year 1998:* OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------MEAN --------------0.1 0.1 0.1 0.1 0.1 MAX --------------0.1 0.1 0.1 0.1 0.1 MIN --------------0.1 0.1 0.1 0.1 0.1 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0.05 MAX 0.05 MIN 0.05 * Gage installed 5/8/98. See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 4 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 4658 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 1997 to September 1998 Day Feb. 4 July 6 Maximum impoundments of interest during Water Year 1998: Maximum Level (ft) Day Maximum Level (ft) 2.50 2.62 Feb. 15 2.45 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 0.3 0.0 0.0 0.0 0.0 0.0 2 0.0 0.0 0.0 0.0 0.0 0.0 0.2 0.0 0.0 0.0 0.0 0.0 3 0.0 0.0 0.0 0.0 0.0 0.0 0.2 0.0 0.0 0.0 0.0 0.0 4 0.0 0.0 0.0 0.0 0.9 0.0 0.2 0.0 0.0 0.0 0.0 0.0 5 0.0 0.0 0.0 0.2 0.2 0.0 0.1 0.0 0.0 0.0 0.0 0.0 6 0.0 0.0 0.1 0.1 0.1 0.0 0.1 0.0 0.0 0.2 0.2 0.0 7 0.0 0.0 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.1 0.0 8 0.0 0.0 0.3 0.0 0.4 0.0 0.0 0.0 0.0 0.2 0.0 0.0 9 0.0 0.0 0.1 0.0 0.6 0.0 0.0 0.0 0.0 0.1 0.0 0.0 10 0.0 0.0 0.0 0.2 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.2 11 0.0 0.0 0.0 0.2 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.2 12 0.0 0.0 0.0 0.1 0.0 0.0 0.3 0.0 0.0 0.0 0.0 0.0 13 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0.0 0.0 0.0 0.0 14 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0.0 0.0 0.0 0.0 15 0.0 0.0 0.0 0.0 0.5 0.2 0.0 0.0 0.0 0.0 0.1 0.0 16 0.0 0.0 0.0 0.0 0.1 0.2 0.0 0.0 0.0 0.0 0.2 0.0 17 0.0 0.0 0.0 0.0 0.4 0.2 0.0 0.0 0.0 0.1 0.2 0.0 18 0.0 0.0 0.0 0.0 0.3 0.2 0.0 0.0 0.0 0.2 0.1 0.0 19 0.0 0.0 0.0 0.0 0.2 0.1 0.0 0.0 0.0 0.1 0.1 0.0 20 0.0 0.0 0.0 0.0 0.3 0.1 0.2 0.0 0.0 0.0 0.0 0.0 21 0.0 0.0 0.1 0.0 0.2 0.0 0.1 0.0 0.0 0.0 0.0 0.0 22 0.0 0.0 0.5 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.3 23 0.0 0.0 0.1 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.1 24 0.0 0.0 0.1 0.0 0.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 25 0.0 0.0 0.0 0.0 0.2 0.0 0.0 0.0 0.0 0.0 0.2 0.0 26 0.0 0.0 0.0 0.0 0.2 0.5 0.0 0.0 0.0 0.0 0.1 0.0 27 0.0 0.0 0.0 0.0 0.1 0.2 0.0 0.0 0.0 0.0 0.0 0.0 28 0.0 0.0 0.0 0.0 0.1 0.3 0.0 0.0 0.0 0.0 0.0 0.0 29 0.0 0.0 0.0 0.0 --0.3 0.0 0.0 0.0 0.0 0.0 0.0 30 0.0 0.0 0.0 0.0 --0.2 0.0 0.0 0.0 0.0 0.0 0.0 31 0.0 --0.0 0.0 --0.1 --0.0 --0.0 0.0 -------------------------------------------------------------------------------MEAN 0.0 0.0 0.1 0.0 0.2 0.1 0.1 0.0 0.0 0.0 0.0 0.0 MAX 0.0 0.0 1.5 0.8 2.5 1.5 1.4 0.5 0.0 2.6 1.3 0.8 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 1998 MEAN 0.05 MAX 2.62 MIN 0.00 See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 5 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 4683 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 1997 to September 1998 Impoundment occurred on following day during Water Year 1998:* Maximum Level (ft) Day July 6 0.65 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 5 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 6 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 7 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 8 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 9 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 10 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 11 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 12 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 13 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 14 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 15 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 16 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 17 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 18 0.2 0.2 0.2 0.2 0.2 0.2 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 0.2 -------------------------------------------------------------------------------MEAN 0.1 0.1 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.2 0.1 0.1 MAX 0.2 0.2 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.6 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 1998 MEAN 0.15 MAX 0.65 MIN 0.15 * Flows up to about the 2-year are passed beneath the detention basin via storm drains. Also, the events during WY 1998 appear to have been caused by local flow from the area immediate to the gage only. See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 6 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 4803 Dreamy Draw Dam Period of Record: Nov. 1987 to current year Revised Records: WY1996: WY1995 Drainage Area: 1.3 mi2 Depth, in feet, Water Year October 1997 to September 1998 Day Feb. 24 Aug. 15 Maximum impoundments of interest during Water Year 1998: Maximum Level (ft) Day Maximum Level (ft) 5.96 3.22 Mar. 26 4.98 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 0.2 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 0.7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 5 0.0 0.0 0.0 0.0 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 6 0.0 0.0 0.0 0.0 0.1 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 0.2 0.0 0.0 8 0.0 0.0 0.1 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 9 0.0 0.0 0.0 0.0 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 10 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 11 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 12 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 13 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 14 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 15 0.0 0.0 0.0 0.0 0.5 0.0 0.0 0.0 0.0 0.0 0.1 0.0 16 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 17 0.0 0.0 0.0 0.0 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 18 0.0 0.0 0.0 0.0 0.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 19 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 20 0.0 0.0 0.0 0.0 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 21 0.0 0.0 0.2 0.0 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 22 0.0 0.0 0.6 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 23 0.0 0.0 0.2 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 24 0.0 0.0 0.0 0.0 0.7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 25 0.0 0.0 0.0 0.0 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 26 0.0 0.0 0.0 0.0 0.2 0.7 0.0 0.0 0.0 0.0 0.0 0.0 27 0.0 0.0 0.0 0.0 0.1 0.1 0.0 0.0 0.0 0.0 0.0 0.0 28 0.0 0.0 0.0 0.0 0.0 0.2 0.0 0.0 0.0 0.0 0.0 0.0 29 0.0 0.0 0.0 0.0 --0.5 0.0 0.0 0.0 0.0 0.0 0.0 30 0.0 0.0 0.0 0.0 --0.2 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 0.2 0.1 0.0 0.0 0.0 0.0 0.0 0.0 MAX 0.0 0.0 1.7 0.0 6.0 5.0 0.3 0.0 0.0 0.4 3.2 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 1998 MEAN 0.02 MAX 5.96 MIN 0.00 See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 7 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 4818 10 St.Wash Basin #1 Period of Record: 11/26/96 to current year Depth, in feet, Water Year October 1997 to September 1998 Day Impoundments of interest occurred on following days during Water Year 1998: Maximum Level (ft) Day Maximum Level (ft) Feb. 4 Mar. 26 1.92 1.48 Feb. 15 Aug. 15 1.70 1.95 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 2 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 4 0.3 0.3 0.3 0.3 0.9 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 0.4 0.3 0.3 7 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.4 0.3 0.3 8 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 9 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 10 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 11 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 12 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 13 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 14 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 15 0.3 0.3 0.3 0.3 0.6 0.3 0.3 0.3 0.3 0.3 0.4 0.3 16 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.5 0.3 17 0.3 0.3 0.3 0.3 0.4 0.3 0.3 0.3 0.3 0.3 0.3 0.3 18 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 19 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 20 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 21 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 22 0.3 0.3 0.4 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 23 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 24 0.3 0.3 0.3 0.3 0.5 0.3 0.3 0.3 0.3 0.3 0.3 0.3 25 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 26 0.3 0.3 0.3 0.3 0.3 0.5 0.3 0.3 0.3 0.3 0.3 0.3 27 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 28 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 29 0.3 0.3 0.3 0.3 --0.3 0.3 0.3 0.3 0.3 0.3 0.3 30 0.3 0.3 0.3 0.3 --0.3 0.3 0.3 0.3 0.3 0.3 0.3 31 0.3 --0.3 0.3 --0.3 --0.3 --0.3 0.3 -------------------------------------------------------------------------------MEAN 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 MAX 0.3 0.3 0.7 0.4 1.9 1.5 0.3 0.3 0.3 1.4 2.0 0.3 MIN 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0.31 MAX 1.95 MIN 0.30 See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 8 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 4904 Cave Buttes Dam Period of Record: Nov. 1987 to current year Drainage Area: 191 mi2 Depth, in feet, Water Year October 1997 to September 1998 Day Feb. 4 Feb. 17 Mar. 29 Maximum impoundments of interest during Water Year 1998: Maximum Level (ft) Day Maximum Level (ft) 13.0* 10.4 12.1 Feb. 15 Feb. 25 14.2 15.0 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 2 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 3 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 4 1.9 1.9 1.9 1.9 8.4 1.9 1.9 1.9 1.9 1.9 1.9 1.9 5 1.9 1.9 1.9 1.9 9.5 1.9 1.9 1.9 1.9 1.9 1.9 1.9 6 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 7 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 8 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 10 1.9 1.9 1.9 1.9 3.8 1.9 1.9 1.9 1.9 1.9 1.9 1.9 11 1.9 1.9 1.9 1.9 2.0 1.9 1.9 1.9 1.9 1.9 1.9 1.9 12 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 13 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 14 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 15 1.9 1.9 1.9 1.9 10.4 1.9 1.9 1.9 1.9 1.9 2.3 1.9 16 1.9 1.9 1.9 1.9 6.8 1.9 1.9 1.9 1.9 1.9 3.2 1.9 17 1.9 1.9 1.9 1.9 3.3 1.9 1.9 1.9 1.9 1.9 1.9 1.9 18 1.9 1.9 1.9 1.9 5.5 1.9 1.9 1.9 1.9 1.9 1.9 1.9 19 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 20 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 21 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 22 1.9 1.9 2.5 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 23 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 24 1.9 1.9 1.9 1.9 2.2 1.9 1.9 1.9 1.9 1.9 1.9 1.9 25 1.9 1.9 1.9 1.9 12.7 1.9 1.9 1.9 1.9 1.9 1.9 1.9 26 1.9 1.9 1.9 1.9 5.1 2.1 1.9 1.9 1.9 1.9 1.9 1.9 27 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 28 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 29 1.9 1.9 1.9 1.9 --9.4 1.9 1.9 1.9 1.9 1.9 1.9 30 1.9 1.9 1.9 1.9 --3.9 1.9 1.9 1.9 1.9 1.9 1.9 31 1.9 --1.9 1.9 --1.9 --1.9 --1.9 1.9 -------------------------------------------------------------------------------MEAN 1.9 1.9 1.9 1.9 3.6 2.2 1.9 1.9 1.9 1.9 2.0 1.9 MAX 1.9 1.9 6.5 1.9 15.0 12.1 1.9 1.9 1.9 1.9 9.0 1.9 MIN 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 -----------------------------------------------------------------------------WTR YR 1998 MEAN 2.07 MAX 15.00 MIN 1.90 * Maximum from high water marks. See also Storage Volume Data. Pool Level Data Page 9 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 4938 Reata Pass Dam Period of Record: 02/25/93 to current year Depth, in feet, Water Year October 1997 to September 1998 No impoundment during Water Year 1998. 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 1998 MEAN 0.00 MAX 0.00 MIN 0.00 Pool Level Data Page 10 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 5113 Saddleback FRS Period of Record: 12/16/88 to current year Drainage Area: 29.6 mi2 excluding area brought in from Harquahala FRS Depth, in feet, Water Year October 1997 to September 1998 Day Sept. 9 Maximum impoundment during Water Year 1998: Maximum Level (ft) 0.4 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 0.3 0.4 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 1998 MEAN 0.30 MAX 0.40 MIN 0.30 See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 11 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 5128 Harquahala FRS Period of Record: 03/01/94 to current year Drainage Area: 102.3 mi2 Depth, in feet, Water Year October 1997 to September 1998 Day July 23 Maximum impoundments of interest during Water Year 1998: Maximum Level (ft) Day Maximum Level (ft) 8.29 Aug. 12 14.05 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2.0 0.4 0.4 0.4 0.4 0.6 0.4 0.4 0.4 0.4 2.1 0.4 2 1.9 0.4 0.4 0.4 0.4 0.5 0.4 0.4 0.4 0.4 1.7 0.4 3 1.8 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 1.7 0.4 4 1.6 0.4 0.4 0.4 0.6 0.4 0.4 0.4 0.4 0.4 1.5 0.4 5 1.5 0.4 0.4 0.4 1.0 0.4 0.4 0.4 0.4 0.6 1.4 0.4 6 1.4 0.4 0.4 0.4 0.5 0.4 0.4 0.4 0.4 0.4 1.3 0.4 7 1.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.5 1.1 0.4 8 1.2 0.4 0.4 0.4 0.5 0.4 0.4 0.4 0.4 0.4 1.0 0.4 9 1.1 0.4 0.4 0.4 2.2 0.4 0.4 0.4 0.4 0.4 0.9 0.4 10 1.0 0.4 0.4 0.4 1.9 0.4 0.4 0.4 0.4 0.4 1.0 0.4 11 1.0 0.4 0.4 0.4 2.0 0.4 0.4 0.4 0.4 0.4 0.8 0.4 12 1.0 0.4 0.4 0.4 1.7 0.4 0.4 0.4 0.4 0.4 2.0 0.4 13 0.9 0.4 0.4 0.4 1.5 0.4 0.4 0.4 0.4 0.4 12.8 0.4 14 0.8 0.4 0.4 0.4 1.4 0.4 0.4 0.4 0.4 0.4 9.6 0.4 15 0.7 0.4 0.4 0.4 1.7 0.4 0.4 0.4 0.4 0.4 3.2 0.4 16 0.6 0.4 0.4 0.4 1.7 0.4 0.4 0.4 0.4 0.4 0.6 0.4 17 0.5 0.4 0.4 0.4 1.7 0.4 0.4 0.4 0.4 0.4 0.4 0.4 18 0.5 0.4 0.4 0.4 1.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 19 0.4 0.4 0.4 0.4 0.8 0.4 0.4 0.4 0.4 0.4 0.4 0.4 20 0.5 0.4 0.4 0.4 1.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 21 0.4 0.4 0.6 0.4 1.9 0.4 0.4 0.4 0.4 0.4 0.4 0.4 22 0.4 0.4 1.7 0.4 1.7 0.4 0.4 0.4 0.4 1.1 0.4 0.4 23 0.4 0.4 1.4 0.4 1.6 0.4 0.4 0.4 0.4 7.8 0.4 0.4 24 0.4 0.4 1.0 0.4 1.6 0.4 0.4 0.4 0.4 6.4 0.4 0.4 25 0.4 0.4 0.7 0.4 1.5 0.4 0.4 0.4 0.4 5.4 0.4 0.4 26 0.4 0.4 0.5 0.4 1.2 0.4 0.4 0.4 0.4 4.6 0.4 0.4 27 0.4 0.4 0.4 0.4 0.8 0.4 0.4 0.4 0.4 3.8 0.4 0.4 28 0.4 0.4 0.4 0.4 0.7 0.4 0.4 0.4 0.4 3.2 0.4 0.4 29 0.4 0.4 0.4 0.4 --0.4 0.4 0.4 0.4 2.8 0.4 0.4 30 0.4 0.4 0.4 0.4 --0.4 0.4 0.4 0.4 2.5 0.4 0.4 31 0.4 --0.4 0.4 --0.4 --0.4 --2.2 0.4 -------------------------------------------------------------------------------MEAN 0.8 0.4 0.5 0.4 1.2 0.4 0.4 0.4 0.4 1.6 1.6 0.4 MAX 1.9 0.4 1.7 0.4 2.3 0.5 0.4 0.4 0.4 8.3 14.1 0.4 MIN 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0.69 MAX 14.05 MIN 0.38 Note: Gated outlet not opened. Therefore, many days of post-flood impoundment. See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 12 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 5203 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 1997 to September 1998 Impoundment occurred only on following day during Water Year 1998: Maximum Level (ft) Day Feb. 8 -2.29 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 -2.5 -2.5 MAX -2.5 -2.5 -2.5 -2.5 -2.3 -2.5 -2.5 -2.5 -2.5 -2.5 -2.5 -2.5 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 1998 MEAN -2.49 MAX -2.29 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 13 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 5208 Buckeye FRS #2 Period of Record: 11/11/92 to current year Drainage Area: 5.7 mi2 without area from Buckeye FRS #3 Depth, in feet, Water Year October 1997 to September 1998 Maximum impoundments of interest during Water Year 1998: Maximum Level (ft) Day Maximum Level (ft) Day Feb. 24 0.69 Aug. 11 0.19 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 2 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 3 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 5 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 6 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 7 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 8 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 9 -1.4 -1.4 -1.4 -1.4 -1.3 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 10 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 11 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.2 -1.4 12 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -0.9 -1.4 13 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.3 -1.4 14 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 15 -1.4 -1.4 -1.4 -1.4 -1.3 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 16 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 17 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 18 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 19 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 20 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 21 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 22 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 23 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 24 -1.4 -1.4 -1.4 -1.4 -1.0 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 25 -1.4 -1.4 -1.4 -1.4 -1.3 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 26 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 27 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 28 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 29 -1.4 -1.4 -1.4 -1.4 --- -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 30 -1.4 -1.4 -1.4 -1.4 --- -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 31 -1.4 --- -1.4 -1.4 --- -1.4 --- -1.4 --- -1.4 -1.4 -------------------------------------------------------------------------------MEAN -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 MAX -1.4 -1.4 -1.2 -1.4 0.7 -1.4 -1.4 -1.4 -1.4 -1.4 0.2 -1.4 MIN -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -1.4 -----------------------------------------------------------------------------WTR YR 1998 MEAN -1.39 MAX 0.69 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 14 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 5233 Sunset FRS Period of Record: 02/12/89 to current year Drainage Area: 0.95 mi2 (from Wickenburg ADMS) Depth, in feet, Water Year October 1997 to September 1998 Day Aug. 12 Maximum impoundments of interest during Water Year 1998: Maximum Level (ft) Day Maximum Level (ft) 5.15 Aug. 13 5.38 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 6.4 0.7 0.7 0.8 0.7 1.6 2.0 0.7 0.7 0.7 0.7 0.8 2 5.7 0.7 0.7 0.7 0.7 1.4 2.2 0.7 0.7 0.7 0.7 0.7 3 4.9 0.7 0.7 1.1 0.8 1.3 2.0 0.7 0.7 0.7 0.7 0.7 4 4.0 0.7 0.7 1.6 2.8 1.0 1.8 0.7 0.7 0.7 0.7 0.9 5 2.8 0.7 0.7 1.9 2.9 0.8 1.6 0.7 0.7 0.7 0.7 0.7 6 0.7 0.7 0.7 1.7 2.7 0.7 1.5 0.7 0.7 0.7 0.7 0.7 7 0.7 0.7 2.2 1.6 2.4 0.7 1.4 0.7 0.7 0.7 0.7 0.7 8 0.7 0.7 2.2 1.5 2.3 0.8 1.2 0.7 0.7 0.7 3.0 0.7 9 0.7 0.7 2.0 1.3 3.4 0.7 0.9 0.7 0.7 0.7 2.6 0.7 10 0.7 0.7 1.8 1.9 3.4 0.7 0.7 0.7 0.7 0.7 2.2 0.7 11 0.7 0.7 1.6 2.5 3.2 0.7 0.7 0.7 0.7 0.7 1.8 0.7 12 0.7 0.7 1.5 2.3 2.9 0.7 1.2 0.7 0.7 0.7 2.3 0.7 13 0.7 0.7 1.3 2.1 2.7 0.7 1.6 1.2 0.7 0.7 4.9 0.7 14 0.7 0.7 0.9 1.9 2.5 0.7 1.4 1.1 0.7 0.7 3.2 0.7 15 0.7 0.7 0.8 1.7 2.8 0.7 1.3 0.7 0.7 0.7 0.7 0.7 16 0.7 0.7 0.7 1.6 2.6 0.7 1.1 0.7 0.7 0.7 0.7 0.7 17 0.7 0.7 0.7 1.4 2.9 0.7 0.9 0.7 0.7 0.7 0.7 0.7 18 0.7 0.7 0.8 1.3 4.0 0.7 0.7 0.7 0.7 0.7 0.7 0.7 19 0.7 0.7 0.7 1.1 3.7 0.7 0.7 0.7 0.7 0.8 0.7 0.7 20 0.7 0.7 0.7 0.9 3.5 0.7 0.7 0.7 0.7 1.7 0.7 0.7 21 0.7 0.7 0.8 0.8 3.4 0.7 0.7 0.7 0.7 1.6 0.7 0.7 22 0.7 0.7 2.9 0.7 3.2 0.7 0.7 0.7 0.7 1.8 0.7 0.7 23 0.7 0.7 2.8 0.7 2.9 0.7 0.7 0.7 0.7 1.5 0.7 0.7 24 0.7 0.7 2.5 0.7 2.7 0.7 0.7 0.7 0.7 1.2 0.8 0.7 25 0.7 0.7 2.3 0.7 2.7 0.7 0.7 0.7 0.7 0.8 0.7 0.7 26 0.7 0.7 2.0 0.7 2.4 2.1 0.7 0.7 0.7 0.7 0.7 0.7 27 0.7 0.7 1.8 0.7 2.1 2.0 0.7 0.7 0.7 0.7 0.7 0.7 28 0.7 0.7 1.6 0.7 1.7 2.1 0.7 0.7 0.7 0.7 0.7 0.7 29 0.7 0.7 1.5 0.7 --2.4 0.7 0.7 0.7 0.7 0.7 0.7 30 0.7 0.7 1.3 0.7 --2.2 0.7 0.7 0.7 0.7 0.7 0.7 31 0.7 --1.0 0.7 --2.0 --0.7 --0.7 0.7 -------------------------------------------------------------------------------MEAN 1.4 0.7 1.4 1.2 2.6 1.1 1.1 0.7 0.7 0.8 1.2 0.7 MAX 6.6 0.7 3.0 2.7 4.1 2.5 2.2 1.6 0.7 2.2 5.4 2.2 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 1998 MEAN 1.13 MAX 6.62 MIN 0.70 Note: Impoundment in first week of Oct. remaining from 09/26/97 event. See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 15 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 5248 Sunnycove FRS Period of Record: Nov. 1987 to current year Drainage Area: 0.98 mi2 (from Wickenburg ADMS) Depth, in feet, Water Year October 1997 to September 1998 Day Aug. 12 Maximum impoundments of interest during Water Year 1998: Maximum Level (ft) Day Maximum Level (ft) 1.53 Aug. 13 1.93 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.0 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 2 0.0 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 3 0.0 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 4 0.0 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 5 0.0 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 6 0.0 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 7 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 8 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 10 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 11 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 12 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 1.0 0.9 13 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 1.5 0.9 14 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 1.0 0.9 15 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 16 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 17 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 18 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 19 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 20 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 21 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 22 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 23 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 24 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 25 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 26 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 27 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 28 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 29 0.9 0.9 0.9 0.9 --0.9 0.9 0.9 0.9 0.9 0.9 0.9 30 0.9 0.9 0.9 0.9 --0.9 0.9 0.9 0.9 0.9 0.9 0.9 31 0.9 --0.9 0.9 --0.9 --0.9 --0.9 0.9 -------------------------------------------------------------------------------MEAN 0.7 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 MAX 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 1.9 0.9 MIN 0.0 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0.88 MAX 1.93 MIN 0.00 Note: Instrument elevation raised from 0.0 ft gage height to 0.9 ft gage height on 10/07/97. See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 16 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 5418 White Tanks #3 FRS Period of Record: Nov. 1987 to current year Drainage Area: 20.5 mi2 (White Tanks ADMS) Depth, in feet, Water Year October 1997 to September 1998 Impoundment above instrument only on following day during Water Year 1998:* Maximum Level (ft) Day Feb. 18 0.25* 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 0.2 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 1998 MEAN 0.00 MAX 0.25 MIN 0.00 * 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). Impoundment of 2/18/98 from high water marks at gage. See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 17 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 5448 McMicken Dam Period of Record: Nov. 1987 to current year Drainage Area: 247 mi2 Depth, in feet, Water Year October 1997 to September 1998 No significant impoundment during Water Year 1998. * 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 1998 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 18 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 5539 Adobe Dam 2 Drainage Area: 89.6 mi Period of Record: Nov. 1987 to present Depth, in feet, Water Year October 1997 to September 1998 Maximum impoundments of interest on following days during Water Year 1998: Maximum Level (ft) Day Maximum Level (ft) Day Feb. 4 Feb. 18 3.6 5.8 Feb. 15 Feb. 25 5.4 2.6 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 4 0.1 0.1 0.1 0.1 1.4 0.1 0.1 0.1 0.1 0.1 0.1 0.1 5 0.1 0.1 0.1 0.1 1.0 0.1 0.1 0.1 0.1 0.1 0.1 0.1 6 0.1 0.1 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 7 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.2 0.1 0.1 8 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 9 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 10 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 11 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 12 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 13 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 14 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 15 0.1 0.1 0.1 0.1 2.8 0.1 0.1 0.1 0.1 0.1 0.1 0.1 16 0.1 0.1 0.1 0.1 0.9 0.1 0.1 0.1 0.1 0.1 0.1 0.1 17 0.1 0.1 0.1 0.1 0.7 0.1 0.1 0.1 0.1 0.1 0.1 0.1 18 0.1 0.1 0.1 0.1 3.6 0.1 0.1 0.1 0.1 0.1 0.1 0.1 19 0.1 0.1 0.1 0.1 0.5 0.1 0.1 0.1 0.1 0.1 0.1 0.1 20 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 21 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 22 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 23 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 24 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 25 0.1 0.1 0.1 0.1 1.6 0.1 0.1 0.1 0.1 0.1 0.1 0.1 26 0.1 0.1 0.1 0.1 0.4 0.1 0.1 0.1 0.1 0.1 0.1 0.1 27 0.1 0.1 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 28 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 29 0.1 0.1 0.1 0.1 --0.1 0.1 0.1 0.1 0.1 0.1 0.1 30 0.1 0.1 0.1 0.1 --0.1 0.1 0.1 0.1 0.1 0.1 0.1 31 0.1 --0.1 0.1 --0.1 --0.1 --0.1 0.1 -------------------------------------------------------------------------------MEAN 0.1 0.1 0.1 0.1 0.5 0.1 0.1 0.1 0.1 0.1 0.1 0.1 MAX 0.1 0.1 0.1 0.1 5.8 0.1 0.1 0.1 0.1 0.7 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 1998 MEAN 0.13 MAX 5.76 MIN 0.10 See also Surface Water Streamflow and Storage Volume Data. 2-year 12.8 Pool Level Data Page 19 Flood Elevation Frequency (from USACE Design Memorandum) 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 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 5614 New River Dam 2 Drainage Area: 164 mi Period of Record: Nov. 1987 to current year Depth, in feet, Water Year October 1997 to September 1998 Maximum impoundments of interest on following days during Water Year 1998: Maximum Level (ft) Day Maximum Level (ft) Day Feb. 10 Feb. 18 Mar. 29 5.6 6.9 9.4 Feb. 15 Feb. 25 7.1 5.3 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 3 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 4 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 5 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 6 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 7 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 8 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 10 2.9 2.9 2.9 2.9 4.2 2.9 2.9 2.9 2.9 2.9 2.9 2.9 11 2.9 2.9 2.9 2.9 4.2 2.9 2.9 2.9 2.9 2.9 2.9 2.9 12 2.9 2.9 2.9 2.9 3.2 2.9 2.9 2.9 2.9 2.9 2.9 2.9 13 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 14 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 15 2.9 2.9 2.9 2.9 5.0 2.9 2.9 2.9 2.9 2.9 2.9 2.9 16 2.9 2.9 2.9 2.9 5.1 2.9 2.9 2.9 2.9 2.9 2.9 2.9 17 2.9 2.9 2.9 2.9 3.6 2.9 2.9 2.9 2.9 2.9 2.9 2.9 18 2.9 2.9 2.9 2.9 6.0 2.9 2.9 2.9 2.9 2.9 2.9 2.9 19 2.9 2.9 2.9 2.9 4.5 2.9 2.9 2.9 2.9 2.9 2.9 2.9 20 2.9 2.9 2.9 2.9 3.5 2.9 2.9 2.9 2.9 2.9 2.9 2.9 21 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 22 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 23 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 24 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 25 2.9 2.9 2.9 2.9 4.8 2.9 2.9 2.9 2.9 2.9 2.9 2.9 26 2.9 2.9 2.9 2.9 4.5 2.9 2.9 2.9 2.9 2.9 2.9 2.9 27 2.9 2.9 2.9 2.9 3.4 2.9 2.9 2.9 2.9 2.9 2.9 2.9 28 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 29 2.9 2.9 2.9 2.9 --8.5 2.9 2.9 2.9 2.9 2.9 2.9 30 2.9 2.9 2.9 2.9 --6.4 2.9 2.9 2.9 2.9 2.9 2.9 31 2.9 --2.9 2.9 --4.1 --2.9 --2.9 2.9 -------------------------------------------------------------------------------MEAN 2.9 2.9 2.9 2.9 3.5 3.2 2.9 2.9 2.9 2.9 2.9 2.9 MAX 2.9 2.9 2.9 2.9 7.1 9.4 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 1998 MEAN 2.96 MAX 9.42 MIN 2.88 See also Surface Water Streamflow and Storage Volume Data. 2-year 7.4 Pool Level Data Page 20 Flood Elevation Frequency (from USACE Design Memorandum) 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 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 5968 StoneRidge Dam 2 Drainage Area: 0.86 mi Period of Record: 12/11/96 to current year Depth, in feet, Water Year October 1997 to September 1998 Day Feb. 24 Maximum impoundment of interest during Water Year 1998: Maximum Level (ft) 2.1 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.8 0.8 0.8 0.8 0.8 0.9 0.9 0.8 0.8 0.8 0.8 0.8 2 0.8 0.8 0.8 0.8 0.8 0.9 0.9 0.8 0.8 0.8 0.8 0.8 3 0.8 0.8 0.8 0.8 0.8 0.9 0.9 0.8 0.8 0.8 0.8 0.8 4 0.8 0.8 0.8 0.8 0.8 0.9 0.9 0.8 0.8 0.8 0.8 0.8 5 0.8 0.8 0.8 0.8 0.8 0.9 0.8 0.8 0.8 0.8 0.8 0.8 6 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 7 0.8 0.8 0.8 0.8 0.8 0.9 0.8 0.8 0.8 0.8 0.8 0.8 8 0.8 0.8 0.8 0.8 0.8 0.9 0.8 0.8 0.8 0.8 0.8 0.8 9 0.8 0.8 0.8 0.8 0.9 0.9 0.8 0.8 0.8 0.8 0.8 0.8 10 0.8 0.8 0.8 0.8 0.9 0.8 0.8 0.8 0.8 0.8 0.8 0.8 11 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 12 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 13 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 14 0.8 0.8 0.8 0.8 0.8 0.9 0.8 0.8 0.8 0.8 0.8 0.8 15 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 16 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 17 0.8 0.8 0.8 0.8 0.9 0.9 0.8 0.8 0.8 0.8 0.8 0.8 18 0.8 0.8 0.8 0.8 0.9 0.8 0.8 0.8 0.8 0.8 0.8 0.8 19 0.8 0.8 0.8 0.8 0.9 0.8 0.8 0.8 0.8 0.8 0.8 0.8 20 0.8 0.8 0.8 0.8 0.9 0.8 0.8 0.8 0.8 0.8 0.8 0.8 21 0.8 0.8 0.8 0.8 0.9 0.8 0.8 0.8 0.8 0.8 0.8 0.8 22 0.8 0.8 0.8 0.8 0.9 0.8 0.8 0.8 0.8 0.8 0.8 0.8 23 0.8 0.8 0.8 0.8 0.9 0.8 0.8 0.8 0.8 0.8 0.8 0.8 24 0.8 0.8 0.8 0.8 0.9 0.8 0.8 0.8 0.8 0.8 0.8 0.8 25 0.8 0.8 0.9 0.8 0.9 0.8 0.8 0.8 0.8 0.8 0.8 0.8 26 0.8 0.8 0.8 0.8 0.9 0.9 0.8 0.8 0.8 0.8 0.8 0.8 27 0.8 0.8 0.8 0.8 0.9 0.9 0.8 0.8 0.8 0.8 0.8 0.8 28 0.8 0.8 0.8 0.8 0.9 0.9 0.8 0.8 0.8 0.8 0.8 0.8 29 0.8 0.8 0.8 0.8 --0.9 0.8 0.8 0.8 0.8 0.8 0.8 30 0.8 0.8 0.8 0.8 --0.9 0.8 0.8 0.8 0.8 0.8 0.8 31 0.8 --0.8 0.8 --0.9 --0.8 --0.8 0.8 -------------------------------------------------------------------------------MEAN 0.8 0.8 0.8 0.8 0.9 0.9 0.8 0.8 0.8 0.8 0.8 0.8 MAX 0.8 0.9 0.9 0.9 2.1 1.2 0.9 0.8 0.8 0.8 0.8 0.9 MIN 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0.81 MAX 2.13 MIN 0.75 See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 21 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 5973 SunRidge Canyon Dam 2 Drainage Area: 1.6 mi Period of Record: 02/04/97 to current year Depth, in feet, Water Year October 1997 to September 1998 Day Feb. 24 Maximum impoundment of interest during Water Year 1998: Maximum Level (ft) 2.2 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 1.3 1.3 1.3 1.3 1.3 1.4 1.4 1.3 1.3 1.3 1.3 1.3 2 1.3 1.3 1.3 1.3 1.3 1.3 1.4 1.3 1.3 1.3 1.3 1.3 3 1.3 1.3 1.3 1.3 1.3 1.3 1.4 1.3 1.3 1.3 1.3 1.3 4 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.4 5 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.4 6 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.4 1.3 1.3 1.3 1.3 7 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 8 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 9 1.3 1.3 1.3 1.3 1.4 1.3 1.3 1.3 1.3 1.3 1.3 1.3 10 1.3 1.3 1.3 1.3 1.4 1.3 1.3 1.3 1.3 1.3 1.3 1.3 11 1.3 1.3 1.3 1.4 1.4 1.3 1.3 1.3 1.3 1.3 1.3 1.3 12 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 13 1.3 1.3 1.3 1.3 1.3 1.3 1.4 1.3 1.3 1.3 1.3 1.3 14 1.3 1.3 1.3 1.3 1.3 1.4 1.3 1.4 1.3 1.4 1.3 1.3 15 1.3 1.3 1.3 1.3 1.5 1.4 1.3 1.3 1.3 1.3 1.3 1.3 16 1.3 1.3 1.3 1.3 1.3 1.4 1.3 1.3 1.3 1.3 1.4 1.3 17 1.3 1.3 1.3 1.3 1.3 1.4 1.3 1.3 1.3 1.3 1.3 1.3 18 1.3 1.3 1.3 1.3 1.3 1.4 1.3 1.3 1.3 1.3 1.3 1.3 19 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 20 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 21 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 22 1.3 1.3 1.3 1.3 1.4 1.3 1.3 1.3 1.3 1.3 1.3 1.3 23 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 24 1.3 1.3 1.3 1.3 1.4 1.3 1.3 1.3 1.3 1.3 1.3 1.3 25 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 26 1.3 1.3 1.3 1.3 1.4 1.4 1.3 1.3 1.3 1.3 1.3 1.3 27 1.3 1.3 1.3 1.3 1.4 1.4 1.3 1.3 1.3 1.3 1.3 1.3 28 1.3 1.3 1.3 1.3 1.4 1.4 1.3 1.3 1.3 1.3 1.3 1.3 29 1.3 1.3 1.3 1.3 --1.4 1.3 1.3 1.3 1.3 1.3 1.3 30 1.3 1.3 1.3 1.3 --1.4 1.3 1.3 1.3 1.3 1.3 1.3 31 1.3 --1.3 1.3 --1.4 --1.3 --1.3 1.3 -------------------------------------------------------------------------------MEAN 1.3 1.3 1.3 1.3 1.4 1.4 1.3 1.3 1.3 1.3 1.3 1.3 MAX 1.4 1.4 1.4 1.4 2.2 1.5 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 1.3 1.3 1.3 1.3 -----------------------------------------------------------------------------WTR YR 1998 MEAN 1.34 MAX 2.22 MIN 1.30 See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 22 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 5978 GoldenEaglePark Dam 2 Drainage Area: 7.13 mi of which 2.02 mi2, 2.13 mi2, and 1.6 mi2 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 1997 to September 1998 Day Feb. 4 Feb. 24 Maximum impoundments of interest during Water Year 1998: Maximum Level (ft) Day Maximum Level (ft) 3.4 3.8 Feb. 15 3.1 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.2 0.2 0.2 0.2 0.2 0.2 0.4 0.2 0.2 0.1 0.2 0.2 2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.1 0.2 4 0.2 0.2 0.2 0.2 1.0 0.2 0.2 0.2 0.2 0.2 0.2 0.2 5 0.2 0.2 0.2 0.2 0.7 0.2 0.2 0.2 0.2 0.2 0.1 0.2 6 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 7 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 8 0.2 0.2 0.6 0.2 0.3 0.2 0.2 0.2 0.1 0.2 0.1 0.2 9 0.2 0.2 0.2 0.2 0.6 0.2 0.2 0.2 0.2 0.2 0.1 0.2 10 0.2 0.2 0.2 0.2 0.1 0.2 0.1 0.2 0.2 0.2 0.2 0.1 11 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.1 0.2 0.2 0.1 0.1 12 0.2 0.2 0.2 0.2 0.2 0.1 0.2 0.2 0.2 0.2 0.1 0.1 13 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.1 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 0.5 0.2 0.2 0.2 0.2 0.2 0.2 0.1 16 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.1 17 0.2 0.2 0.2 0.2 0.5 0.2 0.2 0.2 0.2 0.2 0.2 0.2 18 0.2 0.2 0.2 0.2 0.3 0.2 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 0.1 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 0.1 0.2 0.2 0.2 0.2 0.2 22 0.2 0.2 0.3 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 0.1 0.2 0.1 0.2 0.2 0.2 0.2 24 0.2 0.2 0.2 0.2 0.9 0.2 0.1 0.2 0.2 0.2 0.1 0.2 25 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.1 0.2 0.2 0.2 26 0.2 0.2 0.2 0.2 0.2 0.6 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 0.3 0.1 0.2 0.1 0.2 0.2 0.2 29 0.2 0.2 0.2 0.2 --0.2 0.2 0.2 0.1 0.1 0.2 0.1 30 0.2 0.2 0.2 0.2 --0.3 0.2 0.2 0.1 0.2 0.1 0.2 31 0.2 --0.2 0.2 --0.1 --0.2 --0.2 0.2 -------------------------------------------------------------------------------MEAN 0.2 0.2 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 MAX 0.2 0.2 2.6 0.4 3.8 2.0 2.7 0.2 0.2 0.2 0.8 0.2 MIN 0.1 0.2 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0.18 MAX 3.78 MIN 0.12 See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 23 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 5983 North Heights Dam 2 Drainage Area: 2.13 mi Period of Record: 10/11/96 to current year Depth, in feet, Water Year October 1997 to September 1998 Day Maximum impoundments greater than 3.0 ft gage height during Water Year 1998: Maximum Level (ft) Day Maximum Level (ft) Dec. 8 3.2 Mar. 26 3.1 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.3 0.3 0.3 0.3 0.3 0.3 0.7 0.3 0.3 0.3 0.3 0.3 2 0.3 0.3 0.3 0.3 0.3 0.3 0.4 0.3 0.3 0.3 0.3 0.3 3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 4 0.3 0.3 0.3 0.3 1.1 0.3 0.3 0.3 0.3 0.3 0.3 0.3 5 0.3 0.3 0.3 0.3 1.1 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 0.4 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 8 0.3 0.3 1.1 0.3 0.6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 9 0.3 0.3 0.3 0.3 1.1 0.3 0.3 0.3 0.3 0.3 0.3 0.3 10 0.3 0.3 0.3 0.3 0.4 0.3 0.3 0.3 0.3 0.3 0.3 0.3 11 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 12 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 13 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 14 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 15 0.3 0.3 0.3 0.3 0.8 0.3 0.3 0.3 0.3 0.3 0.3 0.3 16 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 17 0.3 0.3 0.3 0.3 0.8 0.3 0.3 0.3 0.3 0.3 0.3 0.3 18 0.3 0.3 0.3 0.3 0.8 0.3 0.3 0.3 0.3 0.3 0.3 0.3 19 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 20 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 21 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 22 0.3 0.3 0.7 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 23 0.3 0.3 0.4 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 24 0.3 0.3 0.3 0.3 1.0 0.3 0.3 0.3 0.3 0.3 0.3 0.3 25 0.3 0.3 0.3 0.3 0.9 0.3 0.3 0.3 0.3 0.3 0.3 0.3 26 0.3 0.3 0.3 0.3 0.3 1.0 0.3 0.3 0.3 0.3 0.3 0.3 27 0.3 0.3 0.3 0.3 0.3 0.5 0.3 0.3 0.3 0.3 0.3 0.3 28 0.3 0.3 0.3 0.3 0.3 0.6 0.3 0.3 0.3 0.3 0.3 0.3 29 0.3 0.3 0.3 0.3 --0.9 0.3 0.3 0.3 0.3 0.3 0.3 30 0.3 0.3 0.3 0.3 --0.5 0.3 0.3 0.3 0.3 0.3 0.3 31 0.3 --0.3 0.3 --0.3 --0.3 --0.3 0.3 -------------------------------------------------------------------------------MEAN 0.3 0.3 0.4 0.3 0.5 0.3 0.3 0.3 0.3 0.3 0.3 0.3 MAX 0.3 0.3 3.2 0.3 2.9 3.1 2.8 0.3 0.3 0.3 0.3 0.3 MIN 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.2 0.3 0.3 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0.32 MAX 3.23 MIN 0.23 See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 24 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 5988 Aspen Dam 2 Drainage Area: 2.02 mi Period of Record: 01/02/97 to current year Depth, in feet, Water Year October 1997 to September 1998 Day Dec. 7 Maximum impoundments of interest during Water Year 1998: Maximum Level (ft) Day Maximum Level (ft) 1.68 Feb. 4 1.94 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.1 0.2 4 0.2 0.2 0.2 0.2 0.4 0.2 0.2 0.2 0.2 0.1 0.1 0.2 5 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 6 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 7 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 8 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 9 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 10 0.2 0.2 0.2 0.2 0.2 0.2 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 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 16 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 17 0.2 0.2 0.2 0.2 0.3 0.2 0.2 0.2 0.1 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 0.1 23 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.1 0.1 24 0.2 0.2 0.2 0.2 0.4 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 0.1 0.1 0.1 0.2 28 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.1 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 0.2 -------------------------------------------------------------------------------MEAN 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 MAX 0.2 0.2 1.7 0.2 1.9 0.8 0.2 0.2 0.2 0.2 0.2 0.2 MIN 0.2 0.2 0.2 0.2 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.1 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0.19 MAX 1.94 MIN 0.14 See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 25 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 5993 Hesperus Dam 2 Drainage Area: 2.91 mi Period of Record: 12/18/96 to current year Depth, in feet, Water Year October 1997 to September 1998 Day Maximum impoundments greater than 1.5 ft gage height during Water Year 1998: Maximum Level (ft) Mar. 26 1.55 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 0.9 1.0 1.0 2 1.0 1.0 1.0 1.0 1.0 1.0 1.0 0.9 1.0 1.0 1.0 1.0 3 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 4 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 0.9 1.0 5 1.0 1.0 1.0 1.0 1.0 1.0 1.0 0.9 1.0 1.0 1.0 1.0 6 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 7 0.9 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 8 0.9 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 9 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 10 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 11 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 12 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 13 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 0.9 0.9 1.0 1.0 14 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 15 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 16 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 17 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 18 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 19 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 0.9 20 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 21 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 22 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 23 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 24 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 25 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 0.9 1.0 1.0 1.0 26 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 27 1.0 1.0 1.0 1.0 1.0 1.0 1.0 0.9 1.0 1.0 1.0 1.0 28 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 29 1.0 1.0 1.0 1.0 --1.0 0.9 1.0 0.9 0.9 1.0 1.0 30 1.0 1.0 1.0 1.0 --1.0 1.0 1.0 0.9 1.0 1.0 1.0 31 1.0 --1.0 1.0 --1.0 --1.0 --1.0 0.9 -------------------------------------------------------------------------------MEAN 1.0 1.0 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 1.4 1.0 1.3 1.5 1.0 1.0 1.0 1.0 1.0 1.0 MIN 0.9 1.0 0.9 1.0 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0.98 MAX 1.55 MIN 0.95 See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 26 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 6503 Guadalupe FRS 2 Drainage Area: 1.87 mi Period of Record: 06/29/89 to current year Depth, in feet, Water Year October 1997 to September 1998 Day Aug. 17 Maximum impoundments of interest during Water Year 1998: Maximum Level (ft) 3.91 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 0.3 2 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 4 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 5 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 7 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 8 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 9 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 10 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 11 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 12 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 13 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 14 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 15 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 16 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 17 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.7 0.3 18 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 2.6 0.3 19 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 20 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 21 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 22 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 23 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 24 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 25 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 26 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 27 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 28 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 29 0.3 0.3 0.3 0.3 --0.3 0.3 0.3 0.3 0.3 0.3 0.3 30 0.3 0.3 0.3 0.3 --0.3 0.3 0.3 0.3 0.3 0.3 0.3 31 0.3 --0.3 0.3 --0.3 --0.3 --0.3 0.3 -------------------------------------------------------------------------------MEAN 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.4 0.3 MAX 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 3.9 0.3 MIN 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0.27 MAX 3.91 MIN 0.26 See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 27 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 6608 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 1997 to September 1998 Rainfall produced impoundments of interest during Water Year 1998: Maximum Level (ft) Day Maximum Level (ft) Day Feb. 9 8.75 Aug. 16 8.80 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 5.1 3.4 3.3 3.2 4.5 6.2 3.5 2.9 2.4 3.2 5.6 2.6 2 3.1 4.1 5.4 3.3 4.6 6.3 4.6 2.9 2.7 4.2 5.9 3.1 3 3.2 4.2 5.5 3.4 2.4 6.3 2.0 2.8 3.3 4.4 3.1 3.3 4 3.9 4.2 2.2 3.5 6.2 5.1 1.4 2.8 3.3 4.6 2.9 3.7 5 4.0 4.3 1.3 3.6 7.3 4.3 4.5 3.1 3.4 4.9 3.4 4.0 6 1.6 4.3 2.7 3.7 7.2 4.5 2.6 3.5 3.7 1.9 3.5 4.2 7 3.2 1.6 4.7 3.8 7.1 4.7 1.2 3.2 4.5 2.9 3.7 4.3 8 3.7 0.4 5.7 4.0 7.2 4.9 2.3 2.2 4.5 3.3 3.9 4.4 9 1.2 0.7 4.8 4.2 8.6 4.8 1.9 4.2 4.6 3.4 4.4 4.4 10 1.3 2.6 4.0 4.8 8.5 4.8 2.4 4.5 1.6 3.7 2.6 4.4 11 4.3 3.3 4.1 5.7 8.2 4.7 2.8 1.6 2.5 4.2 3.2 4.7 12 4.4 4.0 1.7 5.7 7.2 4.7 2.8 1.9 4.1 5.2 3.9 4.7 13 4.4 4.0 0.8 5.7 1.2 2.4 2.3 2.6 4.2 4.1 3.2 4.8 14 2.1 4.2 2.5 3.4 1.5 1.4 1.4 2.6 4.3 4.4 3.8 4.7 15 3.4 4.3 2.8 2.1 5.3 3.8 2.7 2.6 4.3 3.6 4.7 4.7 16 2.3 4.3 3.1 3.1 5.8 2.9 3.2 2.9 4.4 3.9 8.7 4.7 17 3.4 4.4 3.5 3.8 6.2 3.9 3.3 5.3 4.4 3.8 7.9 2.6 18 3.8 4.5 3.6 3.9 7.2 5.0 3.4 4.5 1.7 4.8 6.7 3.3 19 5.2 4.9 1.9 4.0 7.3 4.0 3.3 2.1 2.8 4.8 2.2 3.5 20 5.2 4.9 2.9 4.0 7.3 4.1 3.4 2.9 4.3 4.7 4.6 3.5 21 5.2 4.9 4.2 4.0 7.3 5.3 3.4 2.8 5.1 4.7 4.7 3.6 22 5.3 4.9 5.9 4.0 7.3 5.8 3.4 2.8 1.9 4.7 4.8 3.9 23 2.8 4.8 6.1 4.0 6.7 6.0 3.7 2.9 1.8 4.7 5.0 4.0 24 2.8 2.0 6.0 4.1 4.5 5.9 3.8 3.4 2.8 1.9 5.5 4.0 25 3.2 1.9 5.9 4.1 3.1 3.3 5.0 4.4 3.0 2.1 5.5 4.1 26 3.4 3.0 3.5 4.1 4.1 4.2 5.6 1.9 3.1 3.0 5.3 4.2 27 3.6 3.2 0.3 4.1 6.3 5.7 4.0 0.4 3.1 3.7 2.1 4.3 28 3.7 3.6 2.0 4.3 6.2 5.8 2.5 2.8 3.2 4.0 3.4 4.3 29 1.6 3.7 2.7 4.3 --6.3 3.1 3.3 3.5 3.6 4.9 4.5 30 0.9 3.7 3.0 4.5 --4.6 2.9 5.0 3.9 3.5 4.9 4.5 31 1.8 --3.1 4.5 --1.3 --5.3 --4.0 4.9 -------------------------------------------------------------------------------MEAN 3.3 3.6 3.5 4.0 5.9 4.6 3.1 3.1 3.4 3.9 4.5 4.0 MAX 5.6 4.9 6.1 5.8 8.8 6.5 5.6 5.7 5.1 5.3 8.8 4.9 MIN 0.2 0.2 0.2 0.3 0.1 0.3 0.5 0.3 0.2 0.2 0.2 0.2 -----------------------------------------------------------------------------WTR YR 1998 MEAN 3.91 MAX 8.80 MIN 0.12 Note: Many days of impoundment due to irrigation tailwater. See also Storage Volume Data. Pool Level Data Page 28 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 6623 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 1997 to September 1998 No significant impoundment during Water Year 1998. 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 1998 MEAN 1.33 MAX 1.3 MIN 1.3 See also Storage Volume Data. Pool Level Data Page 29 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 6628 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 1997 to September 1998 Day Oct. 22 Feb. 25 Maximum impoundments of interest during Water Year 1998: Maximum Level (ft) Day Maximum Level (ft) 5.05 4.93 Feb. 15 Mar. 30 4.10 4.73 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 -0.2 2.3 -0.2 -0.1 -0.2 3.7 3.6 -0.2 -0.2 -0.2 0.6 -0.2 2 -0.2 2.3 -0.2 -0.2 -0.2 3.6 3.1 -0.2 -0.2 -0.2 0.5 -0.2 3 -0.2 2.1 -0.2 -0.2 -0.2 3.4 2.8 -0.2 -0.2 -0.2 0.3 -0.2 4 -0.2 2.0 -0.2 -0.2 -0.2 3.2 2.4 -0.2 -0.2 -0.2 0.1 -0.2 5 -0.2 1.8 -0.2 -0.2 -0.2 3.1 2.1 -0.2 -0.2 -0.2 -0.1 -0.2 6 -0.2 1.7 -0.2 -0.2 -0.2 3.0 1.9 -0.2 -0.2 -0.2 -0.2 -0.2 7 -0.2 1.6 -0.2 -0.2 -0.2 2.8 1.7 -0.2 -0.2 -0.2 -0.2 -0.2 8 -0.2 1.5 1.7 -0.2 0.7 2.7 1.6 -0.2 -0.2 -0.2 -0.2 -0.2 9 -0.2 1.4 2.0 -0.2 3.3 2.6 1.5 -0.2 -0.2 -0.2 -0.2 -0.2 10 -0.2 1.3 1.7 -0.2 3.4 2.5 1.4 -0.2 -0.2 -0.2 -0.2 -0.2 11 -0.2 1.3 1.5 -0.2 3.0 2.6 1.4 -0.2 -0.2 -0.2 -0.2 -0.2 12 -0.2 1.2 1.4 -0.2 2.7 2.3 1.2 -0.2 -0.2 -0.2 -0.2 -0.2 13 -0.2 1.1 1.2 -0.2 2.4 2.3 1.1 -0.2 -0.2 -0.2 -0.2 -0.2 14 -0.2 1.1 1.2 -0.2 2.2 2.0 1.0 -0.2 -0.2 -0.2 -0.2 -0.2 15 -0.2 1.0 0.9 -0.2 3.6 1.9 1.0 -0.2 -0.2 -0.2 -0.2 -0.2 16 -0.2 0.9 1.0 -0.2 3.8 1.8 0.9 -0.2 -0.2 -0.2 -0.2 -0.2 17 -0.2 0.8 1.0 -0.2 3.5 1.8 0.8 -0.2 -0.2 -0.2 -0.2 -0.2 18 -0.2 0.7 0.4 -0.2 3.3 1.7 0.7 -0.2 -0.2 -0.2 -0.2 -0.2 19 -0.2 0.7 0.0 -0.2 3.1 1.6 0.7 -0.2 -0.2 -0.2 -0.2 -0.2 20 -0.2 0.6 -0.1 -0.2 3.4 1.5 0.6 -0.2 -0.2 -0.2 -0.2 -0.2 21 -0.2 0.5 -0.2 -0.2 4.4 1.4 0.5 -0.2 -0.2 -0.2 -0.2 -0.2 22 3.2 0.4 0.6 -0.2 4.1 1.3 0.4 -0.2 -0.2 -0.2 -0.2 -0.2 23 5.0 0.3 0.7 -0.2 3.9 1.2 0.4 -0.2 -0.2 -0.2 -0.2 -0.2 24 4.5 0.1 0.6 -0.2 3.8 1.1 0.1 -0.2 -0.2 -0.2 -0.2 -0.2 25 4.1 -0.1 0.5 -0.2 4.8 1.0 0.0 -0.2 -0.2 -0.2 -0.2 -0.2 26 3.8 -0.2 0.5 -0.2 4.5 0.9 0.0 -0.2 -0.2 -0.2 -0.2 -0.2 27 3.4 -0.2 0.4 -0.2 4.2 0.8 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 28 3.2 -0.2 0.1 -0.2 3.9 0.8 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 29 2.9 -0.2 0.1 -0.2 --0.8 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 30 2.7 -0.2 0.0 -0.2 --4.5 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 31 2.5 --- -0.1 -0.2 --4.1 --- -0.2 --- -0.2 -0.2 -------------------------------------------------------------------------------MEAN 1.0 0.9 0.5 -0.2 2.5 2.2 1.1 -0.2 -0.2 -0.2 -0.2 -0.2 MAX 5.1 2.3 2.5 -0.1 4.9 4.7 3.6 -0.2 -0.2 -0.2 0.7 -0.2 MIN -0.2 -0.2 -0.2 -0.2 -0.2 0.8 -0.2 -0.2 -0.2 -0.2 -0.2 -0.2 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0.55 MAX 5.05 MIN -0.25 See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 30 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 6673 Apache Jct. FRS 2 Drainage Area: 5.8 mi Period of Record: Nov. 1987 to present Depth, in feet, Water Year October 1997 to September 1998 Day Maximum impoundments of interest during Water Year 1998: Maximum Level (ft) Feb. 24 3.11* Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 4 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 5 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 6 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 7 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 8 0.1 0.1 0.3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 9 0.1 0.1 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 10 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 11 0.1 0.1 0.1 0.1 0.7 0.1 0.1 0.1 0.1 0.1 0.1 0.1 12 0.1 0.1 0.1 0.1 1.0 0.1 0.1 0.1 0.1 0.1 0.1 0.1 13 0.1 0.1 0.1 0.1 1.0 0.1 0.1 0.1 0.1 0.1 0.1 0.1 14 0.1 0.1 0.1 0.1 1.0 0.1 0.1 0.1 0.1 0.1 0.1 0.1 15 0.1 0.1 0.1 0.1 1.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 16 0.1 0.1 0.1 0.1 1.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 17 0.1 0.1 0.1 0.1 1.0 0.1 0.1 0.1 0.1 0.1 0.1 0.1 18 0.1 0.1 0.1 0.1 1.0 0.1 0.1 0.1 0.1 0.1 0.1 0.1 19 0.1 0.1 0.1 0.1 1.0 0.1 0.1 0.1 0.1 0.1 0.1 0.1 20 0.1 0.1 0.1 0.1 1.3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 21 0.1 0.1 0.1 0.1 1.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 22 0.3 0.1 0.1 0.1 1.0 0.1 0.1 0.1 0.1 0.1 0.1 0.1 23 0.1 0.1 0.1 0.1 1.0 0.1 0.1 0.1 0.1 0.1 0.1 0.1 24 0.1 0.1 0.1 0.1 1.6 0.1 0.1 0.1 0.1 0.1 0.1 0.1 25 0.1 0.1 0.1 0.1 1.0 0.1 0.1 0.1 0.1 0.1 0.1 0.1 26 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 27 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 28 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.2 0.1 29 0.1 0.1 0.1 0.1 --0.1 0.1 0.1 0.1 0.1 0.1 0.1 30 0.1 0.1 0.1 0.1 --0.7 0.1 0.1 0.1 0.1 0.1 0.1 31 0.1 --0.1 0.1 --0.1 --0.1 --0.1 0.1 -------------------------------------------------------------------------------MEAN 0.1 0.1 0.1 0.1 0.6 0.1 0.1 0.1 0.1 0.1 0.1 0.1 MAX 1.8 0.1 0.9 0.1 3.1 1.8 0.1 0.1 0.1 0.1 0.7 0.2 MIN 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0.17 MAX 3.11* MIN 0.13 * Maximum for 2/24/98 from high water marks. Note: Instrument base value at 1.03 ft gage height from 02/11-25/98. See also Surface Water Streamflow and Storage Volume Data. Station Number: Pool Level Data Page 31 6683 Name: Powerline FRS FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Drainage Area: 49.9 mi2 Period of Record: 12/03/92 to current year Depth, in feet, Water Year October 1997 to September 1998 Day Feb. 4 Maximum impoundments of interest during Water Year 1998: Maximum Level (ft) 0.85 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 4 0.2 0.2 0.2 0.2 0.4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 5 0.2 0.2 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 6 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 7 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 8 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 9 0.2 0.2 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 10 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 11 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 12 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 13 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 14 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 15 0.2 0.2 0.2 0.2 0.4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 16 0.2 0.2 0.2 0.2 0.3 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 0.4 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 0.2 -------------------------------------------------------------------------------MEAN 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 MAX 0.2 0.2 0.6 0.2 0.9 0.2 0.2 0.2 0.2 0.3 0.4 0.2 MIN 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0.20 MAX 0.85 MIN 0.20 See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 32 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 6688 Vineyard FRS 2 Drainage Area: 57.8 mi Period of Record: Nov. 1987 to current year Depth, in feet, Water Year October 1997 to September 1998 Day July 22 Maximum impoundments of interest during Water Year 1998: Maximum Level (ft) 2.83 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 0.4 0.0 0.0 0.0 0.0 0.0 0.0 2 0.0 0.0 0.0 0.0 0.0 0.1 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 0.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 11 0.0 0.0 0.0 0.0 0.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 12 0.0 0.0 0.0 0.0 0.1 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 0.1 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 1.0 0.0 0.0 23 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.2 0.0 0.0 24 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.7 0.0 0.0 25 0.0 0.0 0.0 0.0 0.6 0.0 0.0 0.0 0.0 1.3 0.0 0.0 26 0.0 0.0 0.0 0.0 1.1 0.0 0.0 0.0 0.0 0.9 0.0 0.0 27 0.0 0.0 0.0 0.0 0.8 0.0 0.0 0.0 0.0 0.6 0.0 0.0 28 0.0 0.0 0.0 0.0 0.6 0.0 0.0 0.0 0.0 0.4 0.0 0.0 29 0.0 0.0 0.0 0.0 --0.0 0.0 0.0 0.0 0.3 0.0 0.0 30 0.0 0.0 0.0 0.0 --0.0 0.0 0.0 0.0 0.1 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 0.1 0.0 0.0 0.0 0.0 0.3 0.0 0.0 MAX 0.0 0.0 0.0 0.0 1.1 0.4 0.0 0.0 0.0 2.8 0.2 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 1998 MEAN 0.04 MAX 2.83 MIN 0.00 Note: Instrument elevation at 6 ft gage height for period 02/02/98 to 02/25/98. Therefore, no data less that 6 ft recorded during this time. Multiple events missed. Probable events occurred on 2/4, 2/9, 2/15, 2/17, 2/20, and 2/24. Data shown for 2/10-11 estimated from field observations. See also #6703. See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 33 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 6703 Rittenhouse FRS 2 Drainage Area: 51.3 mi Period of Record: 09/27/88 to current year Depth, in feet, Water Year October 1997 to September 1998 Day Feb. 9 Feb. 18 Maximum impoundments of interest during Water Year 1998: Maximum Level (ft) Day Maximum Level (ft) 4.05 3.01 Feb. 15 Feb. 24 5.91 3.76 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 4 0.1 0.1 0.1 0.1 0.7 0.1 0.1 0.1 0.1 0.1 0.1 0.1 5 0.1 0.1 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 6 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 7 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 8 0.1 0.1 0.1 0.1 0.5 0.1 0.1 0.1 0.1 0.1 0.1 0.1 9 0.1 0.1 0.1 0.1 2.8 0.1 0.1 0.1 0.1 0.1 0.1 0.1 10 0.1 0.1 0.1 0.1 0.7 0.1 0.1 0.1 0.1 0.1 0.1 0.1 11 0.1 0.1 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 12 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 13 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 14 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 15 0.1 0.1 0.1 0.1 4.0 0.1 0.1 0.1 0.1 0.1 0.1 0.1 16 0.1 0.1 0.1 0.1 1.9 0.1 0.1 0.1 0.1 0.1 0.1 0.1 17 0.1 0.1 0.1 0.1 0.4 0.1 0.1 0.1 0.1 0.1 0.1 0.1 18 0.1 0.1 0.1 0.1 2.4 0.1 0.1 0.1 0.1 0.1 0.1 0.1 19 0.1 0.1 0.1 0.1 0.9 0.1 0.1 0.1 0.1 0.1 0.1 0.1 20 0.1 0.1 0.1 0.1 0.9 0.1 0.1 0.1 0.1 0.1 0.1 0.1 21 0.1 0.1 0.1 0.1 1.6 0.1 0.1 0.1 0.1 0.1 0.1 0.1 22 0.1 0.1 1.1 0.1 0.4 0.1 0.1 0.1 0.1 0.1 0.1 0.1 23 0.1 0.1 0.2 0.1 0.2 0.1 0.1 0.1 0.1 0.3 0.1 0.1 24 0.1 0.1 0.1 0.1 1.4 0.1 0.1 0.1 0.1 0.1 0.1 0.1 25 0.1 0.1 0.1 0.1 2.3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 26 0.1 0.1 0.1 0.1 0.5 0.1 0.1 0.1 0.1 0.1 0.1 0.1 27 0.1 0.1 0.1 0.1 0.2 0.2 0.1 0.1 0.1 0.1 0.1 0.1 28 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 29 0.1 0.1 0.1 0.1 --0.1 0.1 0.1 0.1 0.1 0.1 0.1 30 0.1 0.1 0.1 0.1 --1.0 0.1 0.1 0.1 0.1 0.1 0.1 31 0.1 --0.1 0.1 --0.2 --0.1 --0.1 0.1 -------------------------------------------------------------------------------MEAN 0.1 0.1 0.2 0.1 0.8 0.2 0.1 0.1 0.1 0.1 0.1 0.1 MAX 0.1 0.1 2.5 0.1 5.9 2.0 0.1 0.1 0.1 0.4 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 1998 MEAN 0.19 MAX 5.91 MIN 0.13 See also Surface Water Streamflow and Storage Volume Data. Pool Level Data Page 34 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 6739 2 Drainage Area: 143 mi Period of Record: 1/8/98 to current year Whitlow Ranch Dam Refer to U.S. Army Corps of Engineers, Los Angeles District for official data for this site. Pool Level Data Page 35 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 6813 Buckeye FRS #3 2 Drainage Area: 9.3 mi Period of Record: 11/23/92 to current year Depth, in feet, Water Year October 1997 to September 1998 Maximum impoundments of interest during Water Year 1998: Maximum Level (ft) Day Aug. 11 -0.33 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 2 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 3 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 4 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 5 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 6 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 7 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 8 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 9 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 10 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 11 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -3.6 -4.1 12 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -3.8 -4.1 13 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 14 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 15 -4.1 -4.1 -4.1 -4.1 -4.0 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 16 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 17 -4.1 -4.1 -4.1 -4.1 -4.0 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 18 -4.1 -4.1 -4.1 -4.1 -4.0 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 19 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 20 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 21 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 22 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 23 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 24 -4.1 -4.1 -4.1 -4.1 -4.0 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 25 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 26 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 27 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 28 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 29 -4.1 -4.1 -4.1 -4.1 --- -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 30 -4.1 -4.1 -4.1 -4.1 --- -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 31 -4.1 --- -4.1 -4.1 --- -4.1 --- -4.1 --- -4.1 -4.1 -------------------------------------------------------------------------------MEAN -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 -4.1 MAX -4.1 -4.1 -4.1 -4.1 -3.3 -4.1 -4.1 -4.1 -4.1 -4.1 -0.3 -4.0 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 1998 MEAN -4.08 MAX -0.33 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 36 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 6823 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 1997 to September 1998 No impoundment above gage during Water Year 1998.* 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 1998 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 37 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Reservoir Depths Station Number: Name: 7133 Casandro Dam 2 Drainage Area: 1.3 mi Period of Record: 08/15/96 to current year Depth, in feet, Water Year October 1997 to September 1998 Maximum impoundments of interest during Water Year 1998: Maximum Level (ft) Day Aug. 12 3.34 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 0.2 2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 4 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 5 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 6 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 7 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 8 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.5 0.2 9 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 10 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 11 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 12 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.7 0.2 13 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.8 0.2 14 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.4 0.2 15 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.3 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 0.2 -------------------------------------------------------------------------------MEAN 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 MAX 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 3.3 0.2 MIN 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0.19 MAX 3.34 MIN 0.19 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 38 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: 769 Period of Record: to current year Drainage Area: 1,780 mi2 Name: Tat Momolikot Dam Cap Refer to U.S. Army Corps of Engineers, Los Angeles District for official data for this site. Storage Volume Data Page 1 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 4562 Spookhill FRS Cap Period of Record: Nov. 1987 to current year Drainage Area: 13.6 mi2 Spillway Capacity: 1,391 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 Day Maximum impoundments during Water Year 1998: Maximum Storage Maximum Storage (ac-ft) (% full) Day (ac-ft) (% full) Feb. 9 1 < 0.1 Aug. 1 22 1.6 DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 -----------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 1 0 0 0 0 15 22 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0 MAX 22 MIN 0 Note: 15 ac-ft shown for July occurred during rise to Aug. 1 maximum. See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 2 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 4647 E.Fork CC #1 Cap Drainage Area: 1.18 mi2 Period of Record: 03/02/94 to current year Spillway Capacity: 59 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 No storage during Water Year 1998 except on following days: Day Feb. 4 Maximum Storage (ac-ft) (% full) 1 1.7 Day July 6 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 1 0 0 0 0 1 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0 MAX 1 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 3 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 4652 Tatum Wash Basin Cap Drainage Area: mi2 Period of Record: 05/08/98 to current year* Spillway Capacity: 32.7 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 No significant storage during Water Year 1998.* OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------MEAN --------------0 0 0 0 0 MAX --------------0 0 0 0 0 MIN --------------0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0 MAX 0 MIN 0 See also Surface Water Streamflow and Pool Level Data. *Note: Gage installed 05/08/98. Storage Volume Data Page 4 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 4657 E.Fork CC #4 Cap Drainage Area: 0.68 mi2 Period of Record: 01/18/94 to current year Spillway Capacity: 74 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 Day Feb. 15 Maximum impoundments of interest during Water Year 1998: Maximum Storage Maximum Storage (ac-ft) (% full) Day (ac-ft) (% full) 2 2.7 July 6 3 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 0 MAX 0 0 1 0 2 1 1 0 0 3 1 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0 MAX 3 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 5 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 4682 E.Fork CC #3 Cap Drainage Area: 3.52 mi2 (1.86 mi2 controlled by EFCC #1 and EFCC #4) Period of Record: 09/13/94 to current year Spillway Capacity: 175 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 Maximum storage during Water Year 1998.* Maximum Storage (ac-ft) (% full) Day July 6 0.2 < 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 0 0 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 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 6 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 4802 Dreamy Draw Dam Cap Period of Record: Nov. 1987 to current year Revised Records: WY1996: WY1995 Drainage Area: 1.3 mi2 Spillway Capacity: 298 ac-ft Volume, in acre-feet, Water Year October 1997 to September 1998 No significant storage during Water Year 1998.* 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 1998 MEAN 0 MAX 0 MIN 0 * Storage greater than 1 ac-ft (0.3%) begins at 8.2 ft gage height. No impoundments greater than 8.2 ft during WY 1998. See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 7 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 4817 10 St.Wash #1 Cap Period of Record: 11/26/96 to current year Spillway Capacity: 21.64 ac-ft Volume, in acre-feet, Water Year October 1997 to September 1998 Day Feb. 4 Mar. 26 Aug. 15 Maximum impoundments of interest during Water Year 1998: Maximum Storage Maximum Storage (ac-ft) (% full) Day (ac-ft) (% full) 1.19 0.74 1.22 5.5 3.4 5.6 Feb. 15 July 6 0.97 0.66 4.5 3.0 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 1 1 0 0 0 1 1 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0 MAX 1 MIN 0 Storage Volume Data Page 8 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 4902 Cave Buttes Dam Cap Period of Record: Nov. 1987 to current year Drainage Area: 191 mi2 Spillway Capacity: 46,100 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 Maximum impoundments of interest during Water Year 1998: Maximum Storage Maximum Storage (ac-ft) (% full) Day (ac-ft) (% full) Day Dec. Feb. Feb. Mar. 22 10 17 29 55 63 170 255 0.1 0.1 0.4 0.6 Feb. Feb. Feb. Aug. 4 15 25 16 302 360 400 124 0.7 0.8 0.9 0.3 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 164 5 184 6 7 8 9 10 20 11 2 12 13 14 15 220 5 16 97 19 17 24 18 61 19 20 21 22 4 23 24 4 25 288 26 55 2 27 28 29 154 30 25 31 -----------------------------------------------------------------------------MEAN 0 0 0 0 40 6 0 0 0 0 1 0 MAX 0 0 55 0 400 255 0 0 0 0 124 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 MEAN 4 MAX 400 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 9 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 5112 Saddleback FRS Cap Period of Record: 12/16/88 to current year Drainage Area: 29.6 mi2 excluding area brought in from Harquahala FRS Spillway Capacity: 6,743 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 Day Sept. 9 Maximum impoundment during Water Year 1998: Maximum Storage (ac-ft) (% full) 39 0.6 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------9 2 -----------------------------------------------------------------------------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 39 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0 MAX 39 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 10 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 5127 Harquahala FRS Cap Period of Record: 03/01/94 to current year Drainage Area: 102.3 mi2 Spillway Capacity: 8,689 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 Maximum impoundments of interest during Water Year 1998:* Maximum Storage Maximum Storage (ac-ft) (% full) Day (ac-ft) (% full) Day July 23 3 < 0.1 Aug. 12 26 0.3 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------12 13 14 2 16 5 23 24 25 26 3 1 1 -----------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 1 0 MAX 0 0 0 0 0 0 0 0 0 3 26 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0 MAX 26 MIN 0 * 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. Storage Volume Data Page 11 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 5202 Buckeye FRS #1 Cap Period of Record: Nov. 1987 to current year Drainage Area: 74 mi2 without area from Buckeye FRS #2 and #3 Spillway Capacity: 8,105 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 Impoundment only on following day during Water Year 1998:* Maximum Storage (ac-ft) (% full) Day Feb. 8 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 0 2 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0 MAX 2 MIN 0 * Storage volume and percent full statistics assume a connected level pool behind the dam. Also, due to the extreme length of the dam, impoundment may occur behind the dam but not be detected by the instrumentation. See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 12 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 5207 Buckeye FRS #2 Cap Period of Record: 11/11/92 to current year Drainage Area: 5.7 mi2 without area from Buckeye FRS #3 Spillway Capacity: 824 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 No significant storage except on following days in Water Year 1998:* Maximum Storage Maximum Storage (ac-ft) (% full) Day (ac-ft) (% full) Day Feb. 24 4 0.5 Aug. 11 1 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 0 4 0 0 0 0 0 1 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0 MAX 4 MIN 0 * Storage volume and percent full statistics assume a connected level pool behind the dam. Also, due to the extreme length of the dam, impoundment may occur behind the dam but not be detected by the instrumentation. See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 13 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 5232 Sunset FRS Cap Period of Record: 02/12/89 to current year Drainage Area: 0.95 mi2 (from Wickenburg ADMS) Spillway Capacity: 86 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 Day Aug. 12 Maximum impoundments of interest during Water Year 1998: Maximum Storage Maximum Storage (ac-ft) (% full) Day (ac-ft) (% full) 5 5.8 Aug. 13 6 7.0 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 9 2 7 1 3 5 4 2 1 5 1 1 6 1 7 1 1 8 1 1 1 9 1 1 10 1 1 11 1 1 12 1 1 1 13 1 5 14 1 2 15 1 16 1 17 1 18 2 19 2 20 1 21 1 22 1 1 23 1 1 24 1 1 25 1 1 26 1 27 28 29 1 30 1 31 -----------------------------------------------------------------------------MEAN 1 0 0 0 1 0 0 0 0 0 0 0 MAX 9 0 1 1 2 1 1 0 0 1 6 1 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0 MAX 9 MIN 0 Note: Impoundment in first week of Oct. remaining from 09/26/97 event. See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 14 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 5247 Sunnycove FRS Cap Period of Record: Nov. 1987 to current year Drainage Area: 0.98 mi2 (from Wickenburg ADMS) Spillway Capacity: 216 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 No storage greater than 1 ac-ft during Water Year 1998: 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 1998 MEAN 0 MAX 0 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 15 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 5417 White Tanks #3 Cap Period of Record: Nov. 1987 to current year Drainage Area: 20.5 mi2 (White Tanks ADMS) Spillway Capacity: 3,134 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 Maximum storage during Water Year 1998: Maximum Storage (ac-ft) (% full) Day Feb. 130* 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 0 MAX 0 0 0 0 130* 0 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0 MAX 130* MIN 0 * Due to instrument failure during the Feb. 1998 event, no mean values are given. The maximum for water year 1998 was estimated from high water marks at the gage. See also Surface Water Streamflow and Pool Level Data. 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 as published during years prior to WY 1997). Storage Volume Data Page 16 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 5447 McMicken Dam Cap Period of Record: Nov. 1987 to current year Drainage Area: 247 mi2 Spillway Capacity: 20,070 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 No significant storage during Water Year 1998. * 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 1998 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 17 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 5537 Adobe Dam Cap Drainage Area: 89.6 mi2 Period of Record: Nov. 1987 to current year Spillway Capacity: 18,776 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 Day Maximum impoundments of interest occurred on following days during Water Year 1998: Maximum Storage Maximum Storage (ac-ft) (% full) Day (ac-ft) (% full) Feb. 4 Feb. 18 31 91 0.2 0.5 Feb. 15 Feb. 25 76 14 0.4 < 0.1 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 9 5 2 6 7 8 9 10 11 12 13 14 15 29 16 2 17 6 18 39 19 20 21 22 23 24 25 5 26 27 28 29 30 31 -----------------------------------------------------------------------------MEAN 0 0 0 0 3 0 0 0 0 0 0 0 MAX 0 0 0 0 91 0 0 0 0 1 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0 MAX 91 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 18 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 5612 New River Dam Cap Drainage Area: 164 mi2 Period of Record: Nov. 1987 to current year Spillway Capacity: 43,700 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 Day Maximum impoundments of interest occurred on following days during Water Year 1998: Maximum Storage Maximum Storage (ac-ft) (% full) Day (ac-ft) (% full) Feb. 10 Feb. 18 Mar. 29 250 313 439 0.6 0.7 1.0 Feb. 15 Feb. 25 324 233 0.7 0.5 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 13 2 3 4 5 6 7 8 9 10 121 11 179 12 79 13 14 15 185 16 222 17 149 18 269 19 194 20 123 21 22 23 24 25 201 26 193 27 129 28 4 29 393 30 289 31 173 -----------------------------------------------------------------------------MEAN 0 0 0 0 73 28 0 0 0 0 0 0 MAX 0 0 0 0 324 439 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 MEAN 8 MAX 439 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 19 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 5967 StoneRidge Dam Cap Drainage Area: 0.86 mi2 Period of Record: 12/11/96 to current year Spillway Capacity: 66.2 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 No significant storage during Water Year 1998. 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 1998 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 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 5972 SunRidge Canyon Cap Drainage Area: 1.6 mi2 Period of Record: 02/04/97 to current year Spillway Capacity: 94 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 No significant storage during Water Year 1998. 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 1998 MEAN 0 MAX 0 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 21 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 5977 GoldenEaglePark Cap Drainage Area: 7.13 mi2 of which 2.02 mi2, 2.13 mi2, and 1.6 mi2 are controlled by Aspen, North Heights, and Sunridge Canyon Dams respectively Period of Record: 12/12/96 to current year Spillway Capacity: 95 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 No significant storage during Water Year 1998. 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 1998 MEAN 0 MAX 0 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 22 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 5982 North Hghts Dam Cap Drainage Area: 2.13 mi2 Period of Record: 10/11/96 to current year Spillway Capacity: 138 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 No significant storage during Water Year 1998. 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 1998 MEAN 0 MAX 0 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 23 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 5987 Aspen Dam Capacity Drainage Area: 2.02 mi2 Period of Record: 01/02/97 to current year Spillway Capacity: 183 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 No significant storage during Water Year 1998. 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 1998 MEAN 0 MAX 0 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 24 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 5992 Hesperus Dam Cap Drainage Area: 2.91 mi2 Period of Record: 12/18/96 to current year Spillway Capacity: 276 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 No significant storage during Water Year 1998. 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 1998 MEAN 0 MAX 0 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 25 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 6502 Guadalupe FRS Cap Drainage Area: 1.87 mi2 Period of Record: 06/29/89 to current year Spillway Capacity: 329 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 Day Aug. 17 Maximum impoundments of interest during Water Year 1998: Maximum Storage (ac-ft) (% full) 9 2.7 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 1 18 6 19 20 21 22 23 24 25 26 27 28 29 30 31 -----------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 0 0 0 0 0 0 0 0 0 0 9 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0 MAX 9 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 26 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 6608 Freestone Basin Drainage Area: 4.26 mi2 (area downstream of Eastern Canal only, does not include area from overflows of Eastern Canal) Period of Record: 12/19/1995 to current year Spillway Capacity: 218 ac-ft Volume, in acre-feet, Water Year October 1997 to September 1998 Day Feb. 9 Rainfall produced impoundments of interest during Water Year 1998: Maximum Storage Maximum Storage (ac-ft) (% full) Day (ac-ft) (% full) 17.7 8.1 Aug. 16 18.0 8.3 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 3 1 1 2 6 1 1 1 4 1 2 1 1 3 1 2 7 2 1 5 3 1 4 1 1 7 1 1 2 2 1 4 1 1 1 1 7 4 1 2 1 5 1 1 1 10 1 2 1 2 1 1 6 1 1 10 2 1 1 1 1 1 1 7 1 2 1 10 2 1 2 1 1 8 1 5 1 10 2 2 1 1 1 9 3 1 17 2 1 2 1 2 1 10 1 2 17 2 2 1 1 1 2 11 1 1 1 4 15 2 1 1 2 12 2 1 5 10 2 1 3 1 2 13 2 1 5 1 1 1 2 1 2 14 1 1 2 1 2 1 2 15 1 1 3 1 1 1 3 2 16 1 5 1 1 17 2 17 1 2 1 1 6 1 1 3 2 1 13 1 18 1 2 1 1 10 3 1 3 1 2 9 1 19 3 2 1 11 1 1 2 1 1 20 3 2 1 10 1 1 2 2 2 1 21 3 2 1 1 11 3 1 3 2 2 1 22 3 2 5 1 11 5 1 1 2 2 1 23 2 2 6 1 8 5 1 2 3 1 24 1 5 1 3 5 1 1 1 4 1 25 1 5 1 1 2 3 2 4 1 26 1 2 1 3 3 4 1 3 1 27 1 1 1 6 4 3 1 1 1 28 1 1 1 6 5 1 1 1 29 1 1 7 1 1 1 2 2 30 1 2 4 3 1 1 3 2 31 2 3 1 2 -----------------------------------------------------------------------------MEAN 1 1 2 1 7 3 1 1 1 1 3 1 MAX 4 2 6 5 18 7 4 4 3 3 18 2 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 MEAN 2 MAX 18 MIN 0 Note: Many days of storage from irrigation tailwater. See also Pool Level Data. Storage Volume Data Page 27 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 6623 Crossroads Park Drainage Area: 15.7 mi2 (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 Spillway Capacity: 456 ac-ft Volume, in acre-feet, Water Year October 1997 to September 1998 No significant storage during Water Year 1998. 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 1998 MEAN 0 MAX 0 MIN 0 See also Pool Level Data. Storage Volume Data Page 28 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 6627 Signal Butte FRS Cap Drainage Area: 16.4 mi2 not including area from Apache Junction FRS Period of Record: 11/10/87 to current year Spillway Capacity: 1,665 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 Maximum impoundments of interest during Water Year 1998: Maximum Storage Maximum Storage (ac-ft) (% full) Day (ac-ft) (% full) Day Oct. 22 Feb. 25 31 19 1.9 1.1 Feb. 15 Mar. 30 29 26 1.7 1.6 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 4 15 13 2 3 13 9 3 3 11 6 4 2 10 4 5 2 9 3 6 2 8 2 7 1 7 2 8 1 3 1 6 1 9 2 11 5 1 10 1 11 5 11 1 8 5 12 6 4 13 4 4 14 3 3 15 14 2 16 15 2 17 12 2 18 10 1 19 9 1 20 13 1 21 22 22 20 19 23 30 16 24 26 16 25 20 27 26 15 23 27 12 20 28 10 17 29 8 30 6 24 31 5 18 -----------------------------------------------------------------------------MEAN 5 1 0 0 10 5 1 0 0 0 0 0 MAX 31 4 4 0 29 26 13 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 MEAN 2 MAX 31 MIN 0 Note: Storage never above ungated outlet during water year 1998. See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 29 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 6672 Apache Jct. FRS Cap Drainage Area: 5.8 mi2 Period of Record: Nov. 1987 to current year Spillway Capacity: 676 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 Day Feb. 24 Maximum impoundment of interest during Water Year 1998: Maximum Storage (ac-ft) (% full) 3 0.4 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 15 16 17 18 19 20 21 22 23 24 1 25 26 27 28 29 30 31 -----------------------------------------------------------------------------MEAN 0 0 0 0 0 0 0 0 0 0 0 0 MAX 1 0 0 0 3 1 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0 MAX 3 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 30 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 6682 Powerline FRS Cap Drainage Area: 49.9 mi2 Period of Record: 12/03/92 to current year Spillway Capacity: 4,064 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 Day Feb. 4 Maximum impoundment of interest during Water Year 1998: Maximum Storage (ac-ft) (% full) 13 0.3 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 2 3 4 4 5 4 6 7 8 9 4 10 11 12 13 14 15 4 1 16 5 17 18 19 20 1 21 2 22 4 2 1 23 2 24 2 25 26 27 28 29 30 31 -----------------------------------------------------------------------------MEAN 0 0 0 0 1 0 0 0 0 0 0 0 MAX 0 0 8 0 13 0 0 0 0 4 5 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0 MAX 13 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 31 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 6687 Vineyard FRS Cap Drainage Area: 57.8 mi2 Period of Record: Nov. 1987 to current year Spillway Capacity: 3,531 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 Day Feb. 26 Maximum impoundments of interest during Water Year 1998: Maximum Storage Maximum Storage (ac-ft) (% full) Day (ac-ft) (% full) 51 1.4 July 22 323 9.1 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------1 14 2 6 3 2 4 5 6 7 8 9 10 15 11 14 12 3 13 14 15 1 16 5 17 2 18 19 20 21 4 22 109 23 199 24 118 25 28 69 26 49 39 27 39 26 28 26 3 18 29 10 30 6 31 5 -----------------------------------------------------------------------------MEAN 0 0 0 0 6 1 0 0 0 19 0 0 MAX 0 0 0 0 51 15 0 0 0 323 6 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 MEAN 2 MAX 323 MIN 0 Note: Instrument elevation at 6 ft gage height for period 02/02/98 to 02/25/98. Therefore, no data less that 6 ft recorded during this time. Multiple events missed. Probable events occurred on 2/4, 2/9, 2/15, 2/17, 2/20, and 2/24. Data shown for 2/10-11 estimated from field observations. See also #6703. See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 32 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 6702 Rittenhouse FRS Cap Drainage Area: 51.3 mi2 Period of Record: 09/27/88 to current year Spillway Capacity: 3,475 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 Day Feb. 9 Feb. 18 Maximum impoundments of interest during Water Year 1998: Maximum Storage Maximum Storage (ac-ft) (% full) Day (ac-ft) (% full) 12 2 0.3 < 0.1 Feb. 15 Feb. 24 65 9 1.9 0.3 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 5 10 11 12 13 14 15 29 16 2 17 18 2 19 1 20 1 21 1 22 1 23 24 2 25 2 26 27 28 29 30 1 31 -----------------------------------------------------------------------------MEAN 0 0 0 0 2 0 0 0 0 0 0 0 MAX 0 0 2 0 65 1 0 0 0 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0 MAX 65 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 33 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 6739 Drainage Area: 143 mi2 Period of Record: FCDMC 1/8/98 to current year Whitlow Ranch Dam Cap Refer to U.S. Army Corps of Engineers, Los Angeles District for official data for this site. Storage Volume Data Page 34 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 6812 Buckeye FRS #3 Cap Drainage Area: 9.3 mi2 Period of Record: 11/23/92 to current year Spillway Capacity: 1,286 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 No significant storage during Water Year 1998.* 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 1998 MEAN 0 MAX 0 MIN 0 * Due to the extreme length of the dam, impoundment may occur behind the dam but not be detected by the instrumentation. See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 35 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 6822 White Tanks #4 Cap Drainage Area: 18.6 mi2 (White Tanks ADMS) Period of Record: Nov. 1987 to current year Spillway Capacity: 1,243 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 No impoundment above gage during Water Year 1998.* 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 1998 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 36 FCDMC Annual Surface Water Report Water Year 1998 Flood Control District Of Maricopa County ALERT System Computation Of Continuous Records Of Storage Volumes Station Number: Name: 7132 Casandro Dam Cap Drainage Area: 1.3 mi2 Period of Record: 08/15/1996 to current year Spillway Capacity: 143 ac-ft Volume, in acre feet, Water Year October 1997 to September 1998 Day Aug. 8 Aug. 13 Maximum storage impounded during Water Year 1998: Maximum Storage Maximum Storage (ac-ft) (% full) Day (ac-ft) (% full) 3.6 2.8 2.5 2.0 Aug. 12 10.3 7.2 Daily Mean Values DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP -----------------------------------------------------------------------------8 1 12 2 13 2 14 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 10 0 MIN 0 0 0 0 0 0 0 0 0 0 0 0 -----------------------------------------------------------------------------WTR YR 1998 MEAN 0 MAX 10 MIN 0 See also Surface Water Streamflow and Pool Level Data. Storage Volume Data Page 37 FCDMC Annual Surface Water Report Water Year 1998 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 1998 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 1998