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Water-Year Summary for Site 11292900

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Available Parameters
00060 Discharge(Mean)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
11292900 Middle Fork Stanislaus River below Beardsley Dam, CA
LOCATION - Lat 38°11'36", long 120°05'53" referenced to North American Datum of 1927, in NW 1/4 NW 1/4 sec.22, T.4 N., R.17 E., Tuolumne County, CA, Hydrologic Unit 18040010, in Stanislaus National Forest, on right bank, 0.5 mi downstream from Beardsley Afterbay Dam, 1.5 mi downstream from Beardsley Dam, and 5.7 mi west of Pinecrest.
DRAINAGE AREA - 316 mi².
REVISIONS HISTORY - WSP 1930: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - December 1956 to current year.
GAGE - Water-stage recorder. Datum of gage is 3,044.7 ft above NGVD of 1929 (river-profile survey).
COOPERATION - Records, including diversion through Beardsley Powerplant (station 11292820), were provided by Oakdale and South San Joaquin Irrigation District, under general supervision of the U.S. Geological Survey, in connection with Federal Energy Regulatory Commission project no. 2005.
REMARKS - Diversion from Beardsley Afterbay Dam, 0.5 mi upstream, to J.W. Southern Powerplant (station 11292860) at Sand Bar Flat 3 mi downstream, began May 31, 1986. Flow regulated by Relief Reservoir (station 11291000) since 1909, Donnell Lake (station 11292600) since April 1957, and by Beardsley Lake (station 11292800) since January 1957. For records of combined discharge for river and powerplant, see station 11292901. See schematic diagram of Stanislaus River Basin available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - River only, maximum discharge, 28,200 ft³/s, from rating curve extended above 5,400 ft³/s, on basis of spillway computation at Beardsley Dam, Jan. 2, 1997, gage height, 19.31 ft; minimum daily, 3.0 ft³/s, Oct. 10, 11, 1958. Combined flow, maximum daily discharge, 23,100 ft³/s, Jan. 2, 1997; minimum daily, 25 ft³/s, Oct. 23, 1986.