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Water-Year Summary for Site 11316670

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Available Parameters
00060 Discharge(Mean)  

Water year 2018: 2017-10-01 to 2018-09-30
 

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USGS Water-Year Summary 2018
11316670 North Fork Mokelumne River below Tiger Creek Reservoir, near West Point, CA
LOCATION - Lat 38°26'25", long 120°30'14" referenced to North American Datum of 1927, in SE 1/4 SE 1/4 sec.23, T.7 N., R.13 E., Amador County, CA, Hydrologic Unit 18040012, on right bank, 500 ft downstream from Tiger Creek Reservoir Dam, and 3.1 mi northeast of West Point.
DRAINAGE AREA - 357 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1985 to current year (low-flow records only). Unpublished records for water years 1982-85 available in files of the U.S. Geological Survey.
GAGE - Water-stage recorder and concrete control. Elevation of gage is 2,220 ft above NGVD of 1929, from topographic map. Prior to Aug. 11, 2003, at different datum.
COOPERATION - Records were provided by Pacific Gas and Electric Co., under general supervision of the U.S. Geological Survey, in connection with Federal Energy Regulatory Commission project no. 137.
REMARKS - No records computed above 2,200 ft³/s. Flow regulated since 1931 by Salt Springs Reservoir (station 11313500) 20 mi upstream. Water is diverted through Tiger Creek Powerplant Conduit (station 11314000). Additional water is diverted out of the Bear River and several smaller tributaries into Tiger Creek Powerplant Conduit. All the water enters the North Fork Mokelumne River at Tiger Creek Powerplant 0.4 mi downstream. Most of the water is diverted at Tiger Creek Reservoir to West Point Powerplant. See schematic diagram of Mokelumne River Basin available from the California Water Science Center.