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Water-Year Summary for Site 11426170

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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.)  

Water year 2019: 2018-10-01 to 2019-09-30

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USGS Water-Year Summary 2019
11426170 Lake Valley Reservoir near Cisco, CA
LOCATION - Lat 39°18'01", long 120°35'46" referenced to North American Datum of 1927, in NE 1/4 NW 1/4 sec.35, T.17 N., R.12 E., Placer County, CA, Hydrologic Unit 18020128, on upstream face of dam near left abutment on North Fork of North Fork American River, and 3.1 mi west of Cisco.
DRAINAGE AREA - 4.54 mi².
REVISIONS HISTORY - 2014. October 14, 2013, to February 5, 2014, were published in March 2016.
PERIOD OF RECORD - July 1987 to current year. Unpublished records for water years 1980-86 available in files of the U.S. Geological Survey.
GAGE - Water-stage recorder. Datum of gage is 5,727.4 ft above NGVD of 1929 (levels by Pacific Gas and Electric Company). Prior to July 1987, nonrecording gage at same site and datum.
COOPERATION - Records were collected by Pacific Gas and Electric Company, under general supervision of the U.S. Geological Survey, in connection with Federal Energy Regulatory Commission project no. 2310.
REMARKS - Lake is formed by an earth-fill dam; storage began in 1911. Contents based on capacity table from a bathymetric survey in 2009. Usable capacity, 7,902 acre-ft, between gage heights 1.0 ft, invert of outlet, and 57.5 ft, top of flashboards. Released water is diverted downstream to Lake Valley Canal and then to several powerplants. Records, including extremes, represent usable contents at 2400 hours. See schematic diagrams of Bear River Basin and South Yuba River Basin available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - Maximum contents recorded, 8,225 acre-ft, Jan. 1, 1997, gage height, 58.35 ft; minimum recorded, 1,130 acre-ft, Mar. 8-12, 2008, minimum gage height, 24.72 ft, Mar. 10, 2008.