USGS Water-Year Summary 2021
11463200 Big Sulphur Creek near Cloverdale, CA
LOCATION - Lat 38°49'34", long 122°59'45" referenced to North American Datum of 1927, Sonoma County, CA, Hydrologic Unit 18010110, in Rincon de Masalacon Grant, on right bank, 900 ft downstream from unnamed tributary, 1.0 mi upstream from confluence with Russian River, and 1.8 mi. northeast of Cloverdale.
DRAINAGE AREA - 85.5 mi².
- WSP 1929: 1958-60.
PERIOD OF RECORD - July 1957 to September 1972, October 1989 to current year, (October 1989 to September 2019, low-flow records only). WATER TEMPERATURE: Water years 1967-68, 1971-72.
TURBIDITY: Water years 1966-68 (partial-record station).
SEDIMENT DATA: Water years 1964-66 (partial-record station), 1967-68.
GAGE - Water-stage recorder. Elevation of gage is 350 ft above NGVD of 1929, from topographic map. Prior to September 1972, at site 0.8 mi upstream at different datum.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Dec. 22, 1955, reached a stage of 16.8 ft, from floodmarks, site and datum then in use, discharge, 20,000 ft³/s, by slope-area measurement of peak flow.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge (water years 1957-72), 15,700 ft³/s, Dec. 22, 1964, gage height, 15.08 ft, site and datum then in use, from rating curve extended above 5,700 ft³/s, on basis of slope-area measurement at gage height 16.8 ft; minimum daily, no flow for many days.