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Water-Year Summary for Site 11371700

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Available Parameters
00054 Reservoir storage(Obs.)  

Water year 2020: 2019-10-01 to 2020-09-30
 

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USGS Water-Year Summary 2020
11371700 Whiskeytown Lake near Igo, CA
LOCATION - Lat 40°37'03", long 122°31'31" referenced to North American Datum of 1927, in SE 1/4 NE 1/4 sec.22, T.32 N., R.6 W., Shasta County, CA, Hydrologic Unit 18020112, in Whiskeytown-Shasta-Trinity National Recreation Area, at outlet works to Spring Creek Powerplant on Clear Creek, 1.8 mi downstream from Whiskey Creek, and 7.8 mi northeast of Igo.
DRAINAGE AREA - 200 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - May 1963 to current year. Prior to October 1964 published as "Whiskeytown Reservoir near Igo".
GAGE - Water-stage recorder. Datum of gage is NGVD of 1929 (levels by U.S. Bureau of Reclamation). Contents based on capacity table dated April 1962 provided by U.S. Bureau of Reclamation.
COOPERATION - Records were provided by U.S. Bureau of Reclamation, not rounded to U.S. Geological Survey standards.
REMARKS - Lake is formed by earth and rock-fill dam. Storage began in May 1963. Usable capacity, 241,088 acre-ft, between elevations 972.0 ft, invert of sluice pipe, and 1,210.00 ft, crest of glory hole spillway. Dead storage, 8 acre-ft. Normal operating pool is from elevation 1,197.0 ft, capacity, 201,288 acre-ft, to 1,210.0 ft, capacity, 241,096 acre-ft. Transbasin water enters the reservoir through Judge Francis Carr Powerplant (station 11525430) and is released through Spring Creek Tunnel to Spring Creek Powerplant (station 11371600) and Keswick Reservoir. Figures given represent total contents at 2400 hours. Lake is used for power generation and recreation. See schematic diagrams of upper Sacramento River Basin, Klamath River and Trinity River Basins, and Pit River and McCloud River Basins available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - (at 2400 hours) Maximum contents, 258,600 acre-ft, Mar. 2, 1983, elevation, 1,215.34 ft; minimum since first filling, 145,562 acre-ft, Dec. 27, 1992, elevation, 1,176.05 ft.