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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
10336775 Trout Creek At Pioneer Trail Near South Lake Tahoe, CA
LOCATION - Lat 38°54'12.22", long 119°58'08.01" referenced to North American Datum of 1983, in SE 1/4 NE 1/4 sec.10, T.12 N., R.18 E., El Dorado County, CA, Hydrologic Unit 16050101, on left bank, 200 ft upstream of Pioneer Trail Road, 0.6 mi upstream of confluence of Cold Creek, and 2.8 mi south of South Lake Tahoe.
DRAINAGE AREA - 23.7 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - Jun 1990 to Nov 2014.
GAGE - Water-stage recorder. Elevation of gage is 6,270 ft above National Geodetic Vertical Datum of 1929, from topographic map. Prior to May 01, 1992, at datum 0.12 ft higher.
REMARKS - 10/01/2013-09/30/2014: Records good except estimated daily discharges, which are poor. See schematic diagram of Truckee River Basin available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 550 ft³/s, Dec. 31, 2005, gage height, 5.87 ft; maximum gage-height, 7.59 ft, Jan. 02, 1997, from backwater; minimum daily, 2.0 ft³/s, Dec. 22, 1990.
WATER-QUALITY RECORDS
PERIOD OF RECORD - Water years 1990 to Sept. 2011 (discontinued).
PERIOD OF DAILY RECORD - WATER TEMPERATURE: Sep. 1997 to Sep. 2003, discontinued.
INSTRUMENTATION - Water temperature recorder Sep. 1997 to Sep. 2003, two times per hour.
REMARKS - In Nov. 1989, 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 Research Group. Water temperature data for Sep. 1997 were not published but are available from the U.S. Geological Survey, Carson City, NV. Quality assurance samples associated with the entire Lake Tahoe Interagency Monitoring Program are listed under station numbers 103366769999 and 103367309999. The original hydrazine method used to determine nitrate plus nitrite concentrations (parameters 00631 and 00630) was found to have interferences caused by calcium and magnesium in stream water samples. The nitrate plus nitrite concentrations under parameters 99911 and 99910 are based on a laboratory method that 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.
EXTREMES FOR PERIOD OF DAILY RECORD -
WATER TEMPERATURE: Maximum, 22.0°C, Jul. 2, 2001; minimum, freezing point on many days.
