USGS Water-Year Summary for Site 11461500

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	Available Parameters
	00010 Temperature, water(Min.,Mean,Med.,Max.)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Min.,Med.,Mean,Max.)
	00300 Dissolved oxygen(Min.,Med.,Mean,Max.)
	00400 pH(Max.,Med.,Min.)
	63680 Turbidity, Form Neph(Min.,Med.,Max.)

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

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USGS Water-Year Summary 2024

11461500 East Fork Russian River near Calpella, CA

LOCATION - Lat 39°14'48", long 123°07'45" referenced to North American Datum of 1927, in NW 1/4 NW 1/4 sec.18, T.16 N., R.11 W., Mendocino County, CA, Hydrologic Unit 18010110, on left bank, 0.1 mi downstream from Cold Creek, and 3.9 mi east of Calpella.

DRAINAGE AREA - 92.2 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1941 to current year. Monthly discharge only for some periods, published in WSP 1315-B. CHEMICAL ANALYSES: Water years 1951-58, 1973-82. WATER TEMPERATURE: Water years 1967-79. TURBIDITY: Water years 1964-71. SEDIMENT DATA: Water years 1964, 1967-68.

GAGE - Water-stage recorder. Datum of gage is 787.87 ft above NGVD of 1929 and 790.74 ft above NAVD of 1988. Prior to May 28, 1957, at site 1.3 mi downstream at different datum. May 28, 1957, to Apr. 5, 1966, at site 0.4 mi downstream at same datum.

REMARKS - Flow greatly affected by diversion from Eel River through Potter Valley Powerplant Intake and Tailrace (stations 11471000 and 11471099, respectively). Diversion for irrigation of about 8,000 acres upstream from station. See schematic diagram of Russian River Basin available from the California Water Science Center.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 18,700 ft³/s, Dec. 22, 1964, gage height, 20.21 ft, site then in use, maximum gage height, 27.87 ft, Dec. 30, 2005; minimum daily, 1.7 ft³/s, July 23, 1990.

WATER-QUALITY RECORDS

PERIOD OF RECORD -

DISCRETE WATER-QUALITY DATA:
CHEMICAL ANALYSES: Water years 1951-52 (partial-record station), October 1952 to September 1958, March 1973 to current year.
TURBIDITY: Water years 1964-71 (partial-record station).

CONTINUOUS WATER-QUALITY DATA:
WATER TEMPERATURES: Water years March 1964 to February 1979, October 2019 to current year.
SPECIFIC CONDUCTANCE: Water years November 2019 to current year.
DISSOLVED OXYGEN: Water years October 2019 to current year.
pH: Water years October 2019 to current year.
TURBIDITY: Water years October 2019 to current year.
SEDIMENT RECORDS: Water years March to September 1964, October 1966 to September 1968.

REMARKS - Water years 1974-1979 selected chemical-quality data furnished by Corps of Engineers.