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Water-Year Summary for Site 11421790

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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
11421790 Bear River below Dutch Flat Afterbay, near Dutch Flat, CA
LOCATION - Lat 39°12'49", long 120°50'39" referenced to North American Datum of 1927, in NE 1/4 NW 1/4 sec.34, T.16 N., R.10 E., Nevada County, CA, Hydrologic Unit 18020126, at left bank downstream end of spillway on Dutch Flat Afterbay Dam, and 0.6 mi north of Dutch Flat.
DRAINAGE AREA - 21.5 mi².
REVISIONS HISTORY - WDR CA-82-4: 1978, 1979 (instantaneous maximum discharge), 1980.
SURFACE-WATER RECORDS
PERIOD OF RECORD - December 1965 to current year.
GAGE - Water-stage recorder and concrete control. Elevation of gage is 2,600 ft above NGVD of 1929, from topographic map.
COOPERATION - Records were collected by Nevada Irrigation District, under general supervision of the U.S. Geological Survey, in connection with Federal Energy Regulatory Commission project no. 2266.
REMARKS - Water is imported from South Yuba River Basin via Drum Canal above forebay. Chicago Park Flume diverts upstream from station to Chicago Park Powerplant. Records include spill over Dutch Flat Afterbay Dam. See schematic diagram of Bear River Basin available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 4,240 ft³/s, Feb. 17, 1986; minimum daily, 0.08 ft³/s, Mar. 8-19, 1968.