Warning: Javascript must be enabled to use all the features on this page!

Page Loading - Please Wait...

* We've detected you're using a mobile device. Find our mobile dedicated web site here.
Click to hideNews Bulletins

Water-Year Summary for Site 11316670

Click to hide state-specific text

Click to hide Water-Year Summary instructions and information
  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
  • For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
  • For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
  • For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
  • Not all sites have reports available for every water year.
Available Parameters
00060 Discharge(Mean)  

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

Print this page
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.
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 Unpublished records for water years 1982-85 available in files of the U.S. Geological Survey.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.