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USGS Water-Year Summary 2024
11468000 Navarro River near Navarro, CA
LOCATION - Lat 39°10'14", long 123°40'01" referenced to North American Datum of 1927, in SE 1/4 sec.07, T.15 N., R.16 W., Mendocino County, CA, Hydrologic Unit 18010108, on left bank, 2.8 mi downstream from North Fork, 5.3 mi upstream from mouth, and 6.7 mi west of Navarro.
DRAINAGE AREA - 303 mi².
REVISIONS HISTORY - WSP 1445: 1954 (instantaneous maximum discharge). WSP 1929: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1950 to current year.
CHEMICAL ANALYSIS: Water years 1959-66, 1973-79.
WATER TEMPERATURE: Water years 1965-79, 1999-2003.
SEDIMENT DATA: Water years 1999-2003.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 4.79 ft above NGVD of 1929 and 9.22 ft above NAVD of 1988. Prior to Oct. 1, 1969, at site 0.1 mi upstream at datum 0.14 ft lower. Oct. 1, 1969 to Sep. 30, 1998, at site 0.1 mi downstream at datum 2.00 ft lower.
REMARKS - Minor diversion upstream from station at discharges above 200 ft³/s for irrigation.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of December 1937 reached a stage of 38.2 ft, from floodmarks.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 64,500 ft³/s, Dec. 22, 1955, gage height, 40.60 ft, site and datum then in use, from rating curve extended above 19,000 ft³/s, on basis of slope-area measurement of peak flow; minimum daily, 0.23 ft³/s, July 13, 1977.
