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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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USGS Water-Year Summary 2024
11162619 Pilarcitos Creek above Stone Dam near Hillsborough, CA
LOCATION - Lat 37°31'41.3", long 122°24'00.3" referenced to North American Datum of 1983, San Mateo County, CA, Hydrologic Unit 18050006, on left bank, 0.15 mi upstream of Stone Dam Reservoir, and 3.4 mi southwest of Hillsborough.
DRAINAGE AREA - 6.30 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - March 2022 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 522.11 ft above NAVD of 1988.
REMARKS - Flow regulated by storage in Pilarcitos Lake, 2.0 mi upstream, capacity, 2,900 acre-ft.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 357 ft³/s, Dec. 31, 2022, gage height, 4.99 ft. Minimum daily discharge, 1.93 ft³/s, Nov. 14, 2022. No peaks occurred outside period of published record during the 2022 Water Year.
