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Water-Year Summary for Site 11291000

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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.)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
11291000 Relief Reservoir near Baker Station, CA
LOCATION - Lat 38°16'52", long 119°43'57" referenced to North American Datum of 1927, in NW 1/4 SW 1/4 sec.13, T.5 N., R.20 E., Tuolumne County, CA, Hydrologic Unit 18040010, in Stanislaus National Forest, on dam near spillway, 2.2 mi south of Kennedy Meadows, 3.6 mi southeast of Baker Station, and 7.0 mi southeast of Dardanelle.
DRAINAGE AREA - 24.4 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1986 to current year. Unpublished records for water years 1981-86 available in files of the U.S. Geological Survey.
GAGE - Water-stage recorder. Prior to Dec. 9, 1991, nonrecording gage observed approximately weekly. Datum of gage is 7,200 ft above NGVD of 1929 (levels by Pacific Gas and Electric Company).
COOPERATION - Records were collected by the Pacific Gas and Electric Company, under general supervision of the U.S. Geological Survey, in connection with Federal Energy Regulatory Commission project no. 2130.
REMARKS - Missing data Jan. 26 - Feb. 15, 2014, due to lake level below recorder capability. Reservoir is formed by concrete-faced, rock-fill dam completed in 1910. Contents based on capacity table dated 1942. Usable capacity, 12,348 acre-ft, between gage height 1.37 ft, invert of outlet, and 123 ft, spillway crest. Flashboards are added in the summer months, increasing gage height to 138 ft and usable capacity to 15,550 acre-ft. Figures given represent total contents at 2400 hours. Released water is used for hydroelectric power and irrigation downstream. See schematic diagram of Stanislaus River Basin available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - Maximum contents, 15,908 acre-ft, June 29, 2000, gage height, 139.55 ft; minimum observed, 33 acre-ft, Jan. 12, 1987, gage height, 6.1 ft.