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Water-Year Summary for Site 11460600

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Available Parameters
00060 Discharge(Mean)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
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.