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USGS Water-Year Summary 2024
11292600 Donnell Lake near Dardanelle, CA
LOCATION - Lat 38°19'46", long 119°57'37" referenced to North American Datum of 1927, Tuolumne County, CA, Hydrologic Unit 18040010, unsurveyed, in Stanislaus National Forest, on left bank in hoist house of Donnell Dam on Middle Fork Stanislaus River, 1.2 mi downstream from Niagara Creek, and 6.9 mi west of Dardanelle.
DRAINAGE AREA - 230 mi².
REVISIONS HISTORY - WSP 1930: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1957 to September 2006, and October 2007 to current year. Prior to October 1960, published as "Donnells Reservoir near Dardanelle."
GAGE - Water-stage recorder. Elevation of gage is 4,925.44 ft above NGVD of 1929 (levels by Oakdale and South San Joaquin Irrigation Districts). In order to correct to USGS datum, add 4.84 ft to all elevations.
REMARKS - Lake is formed by concrete arch-type dam completed in 1957. Usable capacity, 64,745 acre-ft, between gage heights 4,720.0 ft, minimum operating head, and 4,917.0 ft, top of spillway gates. Contents based on Capacity Table #1, dated Oct. 1, 1956. Lake is for power and conservation storage. Water passes through a 7.2-mi tunnel to a powerplant and down the Middle Fork Stanislaus River to Beardsley Lake (station 11292800). Records represent total contents at 2400 hours, excluding extremes, of which 2,150 acre-ft is below minimum operating head. Records collected in connection with Federal Energy Regulatory Commission (FERC) project no. 2005. See schematic diagram of Stanislaus River Basin available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - Prior to Oct. 1, 2008, maximum contents at 2400 hours, 64,900 acre-ft, May 8, 1963, gage height, 4,917.3 ft; minimum since reservoir first filled, 2,220 acre-ft, Apr. 15, 1983, gage height, 4,720.6 ft.
Since Oct. 1, 2008, maximum contents, 64,100 acre-ft, July 6, 2010, May 21, 22, 2012, elevation, 4,915.44 ft, July 6, 2010.
