USGS Water-Year Summary 2021
11162620 Pilarcitos Creek below Stone Dam, near Hillsborough, CA
LOCATION - Lat 37°31'29", long 122°23'54" referenced to North American Datum of 1927, in NE 1/4 SW 1/4 sec.03, T.5 S., R.5 W., San Mateo County, CA, Hydrologic Unit 18050006, on left bank, 50 ft downstream of unnamed tributary, 0.2 mi downstream of Stone Dam, and 2.4 mi southwest of Hillsborough.
DRAINAGE AREA - 6.54 mi².
PERIOD OF RECORD - October 1997 to current year.
GAGE - Water-stage recorder and crest-stage gage. Elevation of gage is 500 ft above NGVD of 1929, from topographic map.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 408 ft³/s, Jan. 10, 2017, gage height, 7.66 ft, from rating curve extended above 90 ft³/s; no flow Oct. 13, 14, 2001.
PERIOD OF RECORD
CONTINUOUS WATER-QUALITY DATA:
WATER TEMPERATURE: Water years October 2008 to current year.
INSTRUMENTATION - Water-temperature recorder since October 2008.