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Water-Year Summary for Site USGS 11020600

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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Available Parameters
00054 Reservoir storage(Obs.)  
62614 Elevation, lake/res, NGVD29(Obs.)  

Water year 2021: 2020-10-01 to 2021-09-30

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USGS Water-Year Summary 2021
11020600 El Capitan Lake near Lakeside, CA
LOCATION - Lat 32°52'56", long 116°48'30" referenced to North American Datum of 1927, in SE 1/4 NE 1/4 sec.07, T.15 S., R.2 E., San Diego County, CA, Hydrologic Unit 18070304, on left bank, 100 ft upstream from El Capitan Dam on San Diego River, and 7.0 mi east of Lakeside.
DRAINAGE AREA - 188 mi².
PERIOD OF RECORD - October 1936 to September 1966 (published with San Diego River at El Capitan Dam, station 11020500), October 1972 to September 1993, March 2004 to current year. Monthend contents only October 1972 to September 1987. October 1936 to September 1945, published in WSP 1315-B, not equivalent due to exclusion of greater part of flow released from Cuyamaca Reservoir.
GAGE - Water-stage recorder. Datum of gage is NGVD of 1929 (levels by city of San Diego). Prior to October 1987, nonrecording gage at same site.
REMARKS - Reservoir is formed by hydraulic fill-rock embankment, completed in 1935. Capacity of reservoir at spillway level, 112,810 acre-ft, elevation, 750.00 ft. Dead storage below lowest outlet, 59 acre-ft, elevation, 574.00 ft. Reservoir storage includes supplemental Colorado River water. No significant diversion upstream from reservoir. Inflow partly regulated by Cuyamaca Reservoir, capacity, 11,740 acre-ft. Water is released as required for municipal use and irrigation. See schematic diagram of the San Diego River Basin available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - Maximum contents observed, 114,500 acre-ft, spilling, Mar. 7, 1980, elevation, 751.09 ft; minimum observed, 2,252 acre-ft, May 1, 1957, elevation, 606.28 ft.
Capacity table (elevation, in feet, and contents, in acre-feet)
(Based on table dated May 25, 1956)
Elevation   Contents   Elevation   Contents   Elevation   Contents   Elevation   Contents
600         1,450      630        7,820       660        20,650      720        71,790
610         2,820      640        11,310      680        33,780      740        97,790
620         4,940      650        15,530      700        50,730      753       117,550