USGS Water-Year Summary for Site 11462500

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Med.,Mean)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Max.,Min.,Med.,Mean)
	00300 Dissolved oxygen(Max.,Min.,Med.,Mean)
	00400 pH(Max.,Min.,Med.)
	63680 Turbidity, Form Neph(Med.,Max.,Min.) [TS087: YSI 6136]
	63680 Turbidity, Form Neph(Max.,Min.,Med.) [TS213: YSI EXO]

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

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USGS Water-Year Summary 2024

11462500 Russian River near Hopland, CA

LOCATION - Lat 39°01'36", long 123°07'46" referenced to North American Datum of 1927, Mendocino County, CA, Hydrologic Unit 18010110, in Rancho de Sanel Grant, at abandoned highway bridge, 0.3 mi downstream from confluence of McNab Creek, 4 mi north of town of Hopland, and 15.2 mi downstream from Coyote Valley Dam on the East Fork Russian River.

DRAINAGE AREA - 362 mi².

REVISIONS HISTORY -

WSP 1041: Drainage area. Jan 22 to Feb 27 discharge revised.

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1939 to current year. Monthly discharge only for some periods, published in WSP 1315-B.

GAGE - Water-stage recorder and crest-stage gage on right bank. Datum of gage is 497.61 ft above NGVD of 1929 and 500.01 ft above NAVD of 1988. Prior to Sept. 9, 1943, nonrecording gage at same site and datum.

REMARKS - Diversions for irrigation of about 11,800 acres upstream from station. Flow also affected by diversion into basin (see REMARKS for East Fork Russian River stations) and since November 1958 by storage in Lake Mendocino, capacity, 122,400 acre-ft, 15.2 mi upstream. See schematic diagram of Russian River Basin available from the California Water Science Center.

EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Dec. 11, 1937, reached a stage of 30.0 ft, from floodmarks.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 45,000 ft³/s, Dec. 22, 1955, gage height, 27.00 ft; minimum daily, 9.1 ft³/s, Apr. 20, 1977.

WATER-QUALITY RECORDS

PERIOD OF RECORD -

DISCRETE WATER-QUALITY DATA:
CHEMICAL DATA: Water years 1951-66.
SEDIMENT DATA: Water years October 1989-93, October 1994 to April 1996.

CONTINUOUS WATER-QUALITY DATA:
DISSOLVED OXYGEN: Water years January 2002 to current year.
pH: Water years January 2002 to current year.
SPECIFIC CONDUCTANCE: Water years January 2002 to current year.
WATER TEMPERATURE: Water years September 1965 to March 1979, January 2002 to current year.
TURBIDITY: Water years January 2002 to current year.