USGS Water-Year Summary 2019
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.
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.
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.