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
11460600 Lagunitas Creek near Point Reyes Station, CA
LOCATION - Lat 38°04'49", long 122°47'00" referenced to North American Datum of 1927, Marin County, CA, Hydrologic Unit 18050005, in Nicasio (Black) Grant, on right bank, at upstream side of road bridge, 300 ft downstream from small right-bank unnamed tributary, 1.4 mi northeast of town of Point Reyes Station, and 2.5 mi downstream from Nicasio Dam.
DRAINAGE AREA - 81.7 mi².
REVISIONS HISTORY - WDR CA-79-2: 1975, 1978. WDR CA-82-2: 1975 (instantaneous maximum discharge), 1978 (instantaneous maximum discharge), 1980 (instantaneous maximum discharge).
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1974 to current year.
CHEMICAL DATA: Water years 1977, 1999-2001.
WATER TEMPERATURE: Water year 1990.
SEDIMENT DATA: Water years 1990, 1999-2001, 2004-06.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 13.31 ft above NGVD of 1929 and 16.81 ft above NAVD of 1988.
REMARKS - Flow regulated by Nicasio Reservoir, capacity, 22,450 acre-ft, Kent Lake, capacity, 16,680 acre-ft, Alpine Lake, capacity, 8,890 acre-ft, and Bon Tempe Lake, capacity 4,296 acre-ft, all of which divert water for domestic and industrial use in Marin County.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 22,100 ft³/s, Jan. 4, 1982, gage height, 26.96 ft, from rating curve extended above 7,500 ft³/s, on basis of slope-area measurement of peak flow; minimum daily, 0.01 ft³/s, Sept. 26, 1977.
