Warning: Javascript must be enabled to use all the features on this page!


Page Loading - Please Wait...

* We've detected you're using a mobile device. Find our Next Generation Station Page here.
Click to hideNews Bulletins

Water-Year Summary for Site 11467510

Click to hide Water-Year Summary instructions and information
  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
  • For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
  • For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
  • For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
  • Not all sites have reports available for every water year.
Available Parameters
00060 Discharge(Mean)  

Water year 2021: 2021-10-01 to 2022-09-30
 

Print this page
USGS Water-Year Summary 2021
11467510 South Fork Gualala River near The Sea Ranch, CA
LOCATION - Lat 38°42'33", long 123°25'32" referenced to North American Datum of 1927, Sonoma County, CA, Hydrologic Unit 18010109, in German Grant, on left bank, 0.8 mi downstream of Wheatfield Fork Gualala River, and 2.0 mi north of The Sea Ranch.
DRAINAGE AREA - 161 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - June 1991 to September 1992 (low flow only) and October 2007 to current year.
GAGE - Water-stage recorder. Elevation of gage is 40.0 ft above NGVD of 1929, from levels.
REMARKS - Some diversion for agriculture and domestic use.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Dec. 22, 1955, reached a stage of 24.57 ft, former site and datum, South Fork Gualala River near Annapolis (station 11467500), from slope-area measurement, discharge 55,000 ft³/s.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 35,700 ft³/s, Feb. 27, 2019, gage height 35.67 ft. No flow for many days during water year 2008, and Oct. 1, 2, 2008.