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Water-Year Summary for Site 11238250

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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
00060 Discharge(Mean)  

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

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USGS Water-Year Summary 2020
11238250 Eastwood Powerplant above Shaver Lake, near Big Creek, CA
LOCATION - Lat 37°07'55", long 119°15'39" referenced to North American Datum of 1927, in NE 1/4 SW 1/4 sec.20, T.9 S., R.25 E., Fresno County, CA, Hydrologic Unit 18040006, in Sierra National Forest, 0.25 mi upstream from Shaver Lake and 5.0 mi south of town of Big Creek.
PERIOD OF RECORD - October 1987 to current year.
GAGE - Acoustic-flow meter in powerplant penstock. Elevation of gage is 5,400 ft above NGVD of 1929, from topographic map.
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 nos. 67 and 120.
REMARKS - Flow is diverted from Huntington Lake (station 11236000) and Pitman Creek (station 11237600) to Balsam Meadows Forebay, then through a tunnel to the powerplant. The powerplant turbine can be reversed and pump water back up to Balsam Meadows Forebay. Water is returned to Shaver Lake (station 11239500) 0.25 mi downstream for further power development in Big Creek powerplants. See schematic diagram of lower San Joaquin River Basin available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - Maximum daily discharge, 1,910 ft³/s, May 24, 1993; no flow for many days each year; negative flow (from pumpback) several days each year.