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Water-Year Summary for Site 11414250

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Available Parameters
00060 Discharge(Mean)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
11414250 South Yuba River at Langs Crossing, near Emigrant Gap, CA
LOCATION - Lat 39°19'07", long 120°39'24" referenced to North American Datum of 1927, in SW 1/4 SW 1/4 sec.20, T.17 N., R.12 E., Nevada County, CA, Hydrologic Unit 18020125, on right bank, 50 ft downstream from road bridge, 0.8 mi downstream from Spaulding Nos. 1 and 2 Powerplants, and 1.6 mi northeast of Emigrant Gap.
DRAINAGE AREA - 120 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - December 1965 to current year.
GAGE - Water-stage recorder. Elevation of gage is 4,432.44 ft above NGVD of 1929 (levels by Pacific Gas and Electric Co.).
COOPERATION - Records were collected by Pacific Gas and Electric Co., under general supervision of the U.S. Geological Survey, in connection with Federal Energy Regulatory Commission project no. 2310.
REMARKS - Flow regulated by Lake Spaulding (station 11414140) 0.8 mi upstream. Lake Spaulding receives water from Canyon Creek via the Bowman-Spaulding Canal (station 11416100). Most of the water is diverted out of the Yuba River just downstream from Spaulding Dam via Drum Canal (station 11414170) and South Yuba Canal (station 11414200). 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 discharge, about 34,200 ft³/s, estimated, Jan. 1, 1997, gage height, 23.60 ft (datum then in use), from rating curve extended above 8,800 ft³/s, on basis of spillway rating at Spaulding Dam, maximum gage height, 45.68 ft, Apr. 26, 2012; minimum daily, 2.1 ft³/s, on several days during July and September 1977.