USGS Water-Year Summary for Site 11322300

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.)

Select a water year

Water year 2023: 2022-10-01 to 2023-09-30

Print this page

USGS Water-Year Summary 2023

11322300 Camanche Reservoir near Clements, CA

LOCATION - Lat 38°13'34", long 121°01'25" referenced to North American Datum of 1983, in NE 1/4 SE 1/4 sec.06, T.4 N., R.9 E., San Joaquin County, CA, Hydrologic Unit 18040012, at Comanche Dam on the Mokelumne River, 4.3 mi northwest of Clements.

DRAINAGE AREA - 621 mi².

REVISIONS HISTORY - WDR CA-85-3: 1984.

SURFACE-WATER RECORDS

PERIOD OF RECORD - December 1963 to September 1993, October 2008 to current year.

GAGE - Water-stage recorder. Elevation of gage is 115.50 ft above NGVD of 1929 (provided by East Bay Municipal Utility District).

COOPERATION - Records provided by East Bay Municipal Utility District, under general supervision of the U.S. Geological Survey, in connection with Federal Energy Regulatory Commission project no. 2916.

REMARKS - Reservoir is formed by earth-fill dam. Storage began Dec. 18, 1963. Contents based on capacity table 1.0, dated 1989. Usable capacity, 416,800 acre-ft, between elevations 102.00 ft, north and south conduit intakes, and 235.50 ft, spillway crest. Dead storage, 318 acre-ft. Camanche Reservoir provides holdover storage to meet downstream water requirements and flood control on the Mokelumne River. Prior to July 1, 1984, records, including extremes, represent total contents at 2400 hours. Records from July 1, 1984, through July 24, 1989, including extremes, represent total contents at 0800 hours. Records from July 25, 1989, to Sept. 30, 1993, including extremes, represent total contents at 2400 hours. Since Oct. 1, 2008, records, excluding extremes, represent total contents at 2400 hours. See schematic diagram of Mokelumne River basin available from the California Water Science Center.

EXTREMES FOR PERIOD OF RECORD - Prior to Oct. 1, 2008, maximum contents at 0800 hours, 439,100 acre-ft, Feb. 22, 1986, elevation, 236.57 ft. Since Oct. 1, 2008, maximum contents, 393,400 acre-ft, July 1, 2010, elevation, 232.30 ft. Minimum since reservoir first filled, 8,530 acre-ft, Oct. 5, 1988, elevation, 124.47 ft.