USGS Water-Year Summary 2023
11299995 Tulloch Reservoir near Knights Ferry, CA
LOCATION - Lat 37°52'34", long 120°36'12" referenced to North American Datum of 1927, Tuolumne County, CA, Hydrologic Unit 18040010, in Rancheria del Rio Estanislao Grant, in center of Tulloch Dam on Stanislaus River, 1.2 mi downstream from Scorpion Gulch, 1.9 mi upstream from Goodwin Dam, and 5.3 mi northeast of Knights Ferry.
DRAINAGE AREA - 980 mi².
REVISIONS HISTORY - WSP 1930: Drainage area. WDR US-2008: 2007 (Table title for diversion).
SURFACE-WATER RECORDS
PERIOD OF RECORD - November 1957 to September 2006, October 2007 to current year.
GAGE - Water-stage recorder. Datum of gage is 4.05 ft above NAVD of 1988.
EXTREMES FOR PERIOD OF RECORD - Prior to Oct. 1, 2008, maximum contents, 69,500 acre-ft, Jan. 7, 1965, elevation, 512.0 ft; minimum, 4,580 acre-ft, Oct. 3, 1960, elevation, 404.0 ft. Since Oct. 1, 2008, maximum contents, 66,800 acre-ft, Sept. 5, 2017, elevation 509.88.