USGS Water-Year Summary 2018
11182500 San Ramon Creek at San Ramon, CA
LOCATION - Lat 37°46'23", long 121°59'37" referenced to North American Datum of 1927, in sec.08, T.2 S., R.1 W., Contra Costa County, CA, Hydrologic Unit 18050001, on right bank, 0.2 mi downstream from Bollinger Creek, and 1.0 mi southwest of San Ramon.
DRAINAGE AREA - 5.89 mi².
PERIOD OF RECORD - October 1952 to current year.
REVISED RECORDS - WSP 1445: 1953-54 (peaks above base).
GAGE - Water-stage recorder and concrete control. Elevation of gage is 530 ft above NGVD of 1929, from topographic map.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 1,600 ft³/s, Oct. 13, 1962, gage height, 16.98 ft, from rating curve extended above 200 ft³/s, on basis of culvert computation; no flow for parts of most years.