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Water-Year Summary for Site 11385100

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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Available Parameters
00054 Reservoir storage(Obs.,Obs.)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
11385100 East Park Reservoir near Stonyford, CA
LOCATION - Lat 39°21'24", long 122°30'53" referenced to North American Datum of 1927, in SW 1/4 NE 1/4 sec.03, T.17 N., R.6 W., Colusa County, CA, Hydrologic Unit 18020115, near south side of spillway section on East Park Dam on Little Stony Creek, 1.9 mi southeast of Stonyford.
DRAINAGE AREA - 98.2 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1969 to current year. Prior to Oct. 1, 2003, monthend elevation and contents at 0800 hours published.
GAGE - Nonrecording gage read once daily. Datum of gage is NGVD of 1929 (levels by U.S. Bureau of Reclamation).
COOPERATION - Records provided by U.S. Bureau of Reclamation. Contents not rounded to U.S. Geological Survey standards.
REMARKS - Records for 2010-2019 water years did not meet U.S. Geological Survey requirements and were not published. Reservoir is formed by a concrete arch-type dam. Storage began in 1910. Capacity, 48,210 acre-ft, between elevations 1,131.68 ft, invert of sluice pipe, and 1,198.18 ft, crest of spillway. Capacity increased to 50,889 acre-ft with the addition of flashboards to an elevation of 1,199.68 ft. Contents based on capacity table, dated Nov.6, 1970. Dead storage, 279 acre-ft. Records, including extremes, represent contents at 0700 hours. See schematic diagram of lower Sacramento River Basin available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - Maximum contents, 53,500 acre-ft, Mar. 30, 1974, elevation, 1,201.10 ft; minimum, 280 acre-ft, Aug. 8 to Oct. 31, 1972, Apr. 30 to Nov. 1, 1977, elevation, 1,131.68 ft.