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Water-Year Summary for Site 11414140

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Available Parameters
00054 Reservoir storage(Obs.)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
11414140 Lake Spaulding near Emigrant Gap, CA
LOCATION - Lat 39°19'35", long 120°38'32" referenced to North American Datum of 1927, in SE 1/4 NE 1/4 sec.20, T.17 N., R.12 E., Nevada County, CA, Hydrologic Unit 18020125, near center of Spaulding Dam on South Yuba River, and 2.5 mi northeast of Emigrant Gap.
DRAINAGE AREA - 118 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1964 to current year.
GAGE - Water-stage recorder. Datum of gage is 4,809.6 ft above NGVD of 1929 (levels by Pacific Gas and Electric Company). Prior to July 1968, 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 three concrete-arch dams with spillway on the middle arch. Storage began in 1913. Contents based on a May 2008 bathymetric survey. Capacity, 75,740 acre-ft, between gage heights 0.6 ft, bottom of outlet, and 205.0 ft, top of radial gates. Records, including extremes, represent usable contents at 2400 hours. Released water flows through Spaulding Powerplants Nos. 1 and 2. Flow through Powerplant No. 1 is transported out of Yuba River Basin by Drum Canal to Bear River Basin. See schematic diagrams of South Yuba River Basin and Bear River Basin available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - Maximum contents, 75,100 acre-ft, July 13, 1967, gage height, 205.5 ft; minimum, 914 acre-ft, Feb. 28, 1976, gage height, 25.5 ft.