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Water-Year Summary for Site 11414260

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Available Parameters
00054 Reservoir storage(Ins.,Obs.)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
11414260 Blue Lake near Emigrant Gap, CA
LOCATION - Lat 39°21'31", long 120°38'07" referenced to North American Datum of 1927, in NE 1/4 NW 1/4 sec.09, T.17 N., R.12 E., Nevada County, CA, Hydrologic Unit 18020125, in Tahoe National Forest, on outlet structure on Blue Lake Dam, 0.7 mi upstream from Rucker Lake, and 4.6 mi northeast of Emigrant Gap.
DRAINAGE AREA - 0.27 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1999 to current year. Unpublished records for water years 1966-99 available in the files of the U.S. Geological Survey.
GAGE - Water-stage recorder.  Datum of gage is 5,932 ft above NGVD of 1929 (levels by Pacific Gas and Electric Company).  Prior to October, 2016, 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 - Records not collected during the winter months.  Reservoir is formed by an earth-fill dam completed in 1870, reconstructed in 2000. Contents based on capacity table dated 1964. Usable capacity, 1,158 acre-ft, between gage heights 0.0 ft, invert of outlet valve, and 20.8 ft, crest of spillway. Figures given represent usable contents. Released water is used for hydroelectric power and irrigation downstream. See schematic diagram of South Yuba River Basin available from the California Water Science Center.