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Water-Year Summary for Site 11231000

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Available Parameters
00054 Reservoir storage(Obs.)  

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

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USGS Water-Year Summary 2021
11231000 Lake Thomas A. Edison near Big Creek, CA
LOCATION - Lat 37°22'09", long 118°59'17" referenced to North American Datum of 1927, Fresno County, CA, Hydrologic Unit 18040006, unsurveyed, in Sierra National Forest, in outlet works of Vermillion Valley Dam on Mono Creek, and 18.1 mi northeast of town of Big Creek.
PERIOD OF RECORD - October 1954 to current year. Prior to 1960, maximum and minimum daily contents were published.
GAGE - Water-stage recorder. Elevation of gage is 7,642.50 ft above NGVD of 1929 (levels by Southern California Edison Co.).
COOPERATION - Records were collected by Southern California Edison Co., under general supervision of the U.S. Geological Survey, in connection with Federal Energy Regulatory Commission project no. 2086. Contents not rounded to U.S. Geological Survey standards.
REMARKS - Lake is formed by earth-fill dam; dam completed and storage began Oct. 12, 1954. Contents based on capacity table dated July 22, 1955. Usable capacity, 125,035 acre-ft, between elevations 7,508.9 ft, invert of outlet works, and 7,642.50 ft, top of gates in service spillway. Water is diverted at times into lake from Warm Creek (station 11231700). Water is released for diversion to Ward Tunnel via Mono Creek Conduit (station 11231550). Records, excluding extremes, represent contents at 2400 hours. See schematic diagram of upper San Joaquin River Basin available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - Maximum contents, 125,983 acre-ft, Sept. 26, 1982, elevation, 7,643.55 ft; minimum since appreciable storage was attained, 4,414 acre-ft, Dec. 2, 2014, elevation, 7,551.79 ft.