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.
USGS Water-Year Summary 2024
11460000 Corte Madera Creek at Ross, CA
LOCATION - Lat 37°57'47", long 122°33'21" referenced to North American Datum of 1927, Marin County, CA, Hydrologic Unit 18050002, in Punta de Quentin Land Grant, on left bank behind fire station at Ross, 1.7 mi southwest of San Rafael, and 4 mi upstream of mouth.
DRAINAGE AREA - 18.1 mi².
REVISIONS HISTORY - WDR CA-85-2: 1982 (instantaneous maximum discharge). The maximum daily load was revised from 28,200 tons on Jan 19, 1980 to 7,120 tons on Jan 11, 1980.
SURFACE-WATER RECORDS
PERIOD OF RECORD - February 1951 to September 1993, November 2009 to October 2012 (seasonal records only), November 2012 to current year.
GAGE - Water-stage recorder. Datum of gage is 7.97 ft above NGVD of 1929 and 10.44 ft above NAVD of 1988.
REMARKS - Flow slightly regulated by Phoenix Lake, capacity 612 acre-ft. Diversion on tributary upstream from station by Marin Municipal Water District.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 7,200 ft³/s, Jan. 4, 1982, gage height, 19.81 ft, from rating curve extended above 2,700 ft³/s; no flow at times.
WATER-QUALITY RECORDS
PERIOD OF RECORD - Water years 1978-80, November 2009 to 2013 (storm season only).
WATER TEMPERATURE: Water years 1978-80, November 2009 to 2013 (storm season only).
SEDIMENT DATA: Water years 1978-80, November 2009 to 2013 (storm season only).
PERIOD OF DAILY RECORD - SUSPENDED-SEDIMENT DISCHARGE: October 1977 to September 1980, November 2009 to 2013 (storm season only).
EXTREMES FOR PERIOD OF DAILY RECORD - SEDIMENT CONCENTRATION: Maximum daily mean, 1,240 mg/L, Jan. 11, 1980, Jan. 18, 2010; minimum daily mean, no flow many days in 1978.
SEDIMENT LOAD: Maximum daily, 7,120 tons, Jan. 11, 1980; minimum daily, 0 ton, many days during most years.
