Warning: Javascript must be enabled to use all the features on this page!

Page Loading - Please Wait...

Click to hideNews Bulletins

Water-Year Summary for Site 11295220

Click to hide Water-Year Summary instructions and information
  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
  • For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
  • For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
  • For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
  • Not all sites have reports available for every water year.
Available Parameters
00054 Reservoir storage(Obs.)  

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

Print this page
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.
REMARKS - Reservoir is formed by concrete gravity-type dam completed in July 1989. Contents based on capacity table dated July 1989. Usable capacity, 12 acre-ft, between elevations 4,168.5 ft, low level sluiceway invert elevation, and 4,191.5 ft, crest of spillway. Water is diverted through tunnel to McKays Point Reservoir (station 11295260) on North Fork Stanislaus River. Released water is used for fishery maintenance. At times, during some years, reservoir is drained below minimum fishwater release elevation to allow replacement of the fish screens. Records, including extremes, represent total contents at 2400 hours. See schematic diagram of Stanislaus River Basin available from the California Water Science Center.
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.