USGS Water-Year Summary 2020
11295220 Beaver Creek Diversion Reservoir near Arnold, CA
LOCATION - Lat 38°13'58", long 120°16'43" referenced to North American Datum of 1927, in NW 1/4 NW 1/4 sec.01, T.4 N., R.15 E., Tuolumne County, CA, Hydrologic Unit 18040010, in Stanislaus National Forest, on right bank at outlet structure of Beaver Creek Diversion Dam on Beaver Creek, and 4.5 mi east-southeast of Arnold.
DRAINAGE AREA - 29.3 mi².
PERIOD OF RECORD - February 1990 to current year.
GAGE - Water-stage recorder. Datum of gage is NGVD of 1929 (levels by Calaveras County Water District).
COOPERATION - Records were collected by Northern California Power Agency, under general supervision of the U.S. Geological Survey, in connection with Federal Energy Regulatory Commission project no. 2409.
EXTREMES FOR PERIOD OF RECORD - Maximum contents, 15 acre-ft, Jan. 1, 1997, elevation, 4,195.5 ft; no storage on many days in 1997-1999, 2017.