USGS Water-Year Summary for Site USGS 10337500

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Med.)
	00020 Temperature, air(Max.,Min.)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Max.,Min.,Med.)

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Water year 2024: 2024-10-01 to 2025-09-30

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USGS Water-Year Summary 2024

10337500 Truckee River at Tahoe City, CA

LOCATION - Lat 39°09'59", long 120°08'36" referenced to North American Datum of 1927, in NE 1/4 NW 1/4 sec.07, T.15 N., R.17 E., Placer County, CA, Hydrologic Unit 16050102, on left bank, 510 ft downstream from dam at outlet of Lake Tahoe, at Tahoe City.

DRAINAGE AREA - 507 mi².

REVISIONS HISTORY - WDR CA-78-3: Drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - July 1895 to February 1896, March 1900 to current year. Monthly discharge only for some periods, published in WSP 1314 and 1734. Prior to October 1961, published as "at Tahoe."

CHEMICAL DATA: Water years 1978-81, 2001-11.

WATER TEMPERATURE: June 1993 to June 1994, October 2003 to September 2014.

SPECIFIC CONDUCTANCE: October 2003 to September 2014.

AIR TEMPERATURE: July 2002 to September 2014.

GAGE - Water-stage recorder. Datum of gage is 6,216.59 ft above NGVD of 1929. Prior to Nov. 12, 1912, nonrecording gage at site 370 ft upstream at different datum. Nov. 12, 1912, to Sept. 30, 1937, nonrecording gage; Oct. 1, 1937, to Aug. 21, 1957, water-stage recorder at datum 2.26 ft higher; and Aug. 22, 1957, to July 10, 1960, at datum 2.42 ft higher; all at site 270 ft upstream.

REMARKS - Flow completely regulated by dam at outlet of Lake Tahoe (station 10337000), 510 ft upstream. There are several diversions for irrigation, power, and domestic water supply. In addition, sewer effluent is pumped from the Lake Tahoe Basin. See schematic diagram of Truckee River Basin available from the California Water Science Center.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 2,690 ft³/s, Jan. 2, 1997, gage height, 9.59 ft; no flow for parts of many years.

CLIMATOLOGICAL RECORDS

PERIOD OF RECORD - July 2002 to September 2014 (discontinued).

INSTRUMENTATION - Air temperature sensors and digital recorder.

EXTREMES FOR PERIOD OF RECORD - Maximum recorded temperature, 35.7°C, Aug. 11, 2004; minimum recorded, -19°C, Dec. 27, 2003, Jan. 13, 2013.

WATER-QUALITY RECORDS

PERIOD OF RECORD - Water years 1978-81, 1993-94, 2002 to 2014 (discontinued).

CHEMICAL DATA: Water years 1978-81, 2001-11.

PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: October 2003 to September 2014 (discontinued).

WATER TEMPERATURE: June 1993 to June 1994, October 2003 to September 2014 (discontinued).

INSTRUMENTATION - Water temperature and specific conductance sensors and digital recorder.

REMARKS - Interruptions in record due to questionable data, sensor fouling, or sensor out of water.

Water temperature records rated excellent.

Specific conductance records rated excellent except for Oct. 18, 2013, to Feb. 5, 2014, which is rated fair, and June 17 to Sept. 23, 2014, which are good.

EXTREMES FOR PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: Maximum recorded, 169 microsiemens, Feb. 3, 4, 7, 8, 2005; minimum recorded, 54 microsiemens, Jan. 3, 2009.

WATER TEMPERATURE: Maximum recorded, 24°C, Aug. 20, 29, 30, 2004, July 18, 2005; minimum recorded, 0.0°C, on a few days in most years.