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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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USGS Water-Year Summary 2024
10336676 Ward Creek at State Highway 89, near Tahoe Pines, CA
LOCATION - Lat 39°07'56", long 120°09'24" referenced to North American Datum of 1927, in NW 1/4 SE 1/4 sec.24, T.15 N., R.16 E., Placer County, CA, Hydrologic Unit 16050101, Tahoe National Forest, on right bank, 165 ft downstream from State Highway 89 Bridge, 2.1 mi north of Tahoe Pines, and 2.6 mi southwest of Tahoe City.
DRAINAGE AREA - 9.70 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1972 to current year.
GAGE - Water-stage recorder. Datum of gage is 6,239.63 ft above NAVD of 1988.
REMARKS - Minor diversion for local water supply upstream from station. See schematic diagram of Truckee River Basin available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 2,530 ft³/s, Jan. 1, 1997, gage height, 9.36 ft; no flow for many days during several years.
WATER-QUALITY RECORDS
PERIOD OF RECORD -
DISCRETE WATER-QUALITY DATA:
CHEMICAL DATA: Water years January 1993 to current year.
SEDIMENT DATA: Water years 1981 to 1989, 1991 to 1992.
CONTINUOUS WATER-QUALITY DATA:
SPECIFIC CONDUCTANCE: Water years October 1980 to September 1983.
WATER TEMPERATURE: Water years October 1972 to June 1978 (storm season only for water years 1977-78), October 1979 to September 1992, January 2015 to current year.
SUSPENDED-SEDIMENT DISCHARGE: Water years October 1972 to June 1978 (storm season only for water years 1977-78), October 1979 to September 1992.
TURBIDITY: Water years January 2015 to current year.
REMARKS - In October 1992, station was incorporated into the expanded Lake Tahoe Interagency Monitoring Program to monitor tributary contributions of nutrients and sediment to Lake Tahoe. Nutrient samples were analyzed by the University of California, Davis, Tahoe Environmental Research Center (previously the Tahoe Research Group). The original hydrazine method used to determine nitrate plus nitrite concentrations (parameter codes 000631 and 000630) was found to have interferences caused by calcium and magnesium in stream water samples. The current laboratory method uses pyrophosphate to remove interferences caused by calcium and magnesium. This method has replaced the original hydrazine method as of December 2008. Parameter code 00623, filtered ammonia plus organic nitrogen (dissolved Kjeldahl nitrogen) was discontinued in April 2011. Water temperature data for September 1997 were not published but are available from the U.S. Geological Survey in Carson City, NV. Prior to October 2011, quality assurance blank samples associated with the entire Lake Tahoe Interagency Monitoring Program were listed under station numbers 103366769999 and 103367309999. Starting October 2011, quality assurance blanks are included with the station number where the blanks are processed.
