USGS Water-Year Summary 2021
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.
- WSP 1041: Drainage area.
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. Prior to Sept. 9, 1943, nonrecording gage at same site and datum.
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.
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.