USGS Water-Year Summary 2020
11172945 Alameda Creek above Diversion Dam, near Sunol, CA
LOCATION - Lat 37°29'51", long 121°46'21" referenced to North American Datum of 1927, in SE 1/4 NE 1/4 sec.17, T.5 S., R.2 E., Alameda County, CA, Hydrologic Unit 18050004, on right bank, 700 ft upstream from diversion dam, and 9.3 mi southeast of Sunol.
DRAINAGE AREA - 33.3 mi².
PERIOD OF RECORD - October 1994 to current year.
GAGE - Water-stage recorder and crest-stage gage. Elevation of gage is 930 ft above NGVD of 1929, from topographic map. Prior to June 29, 2009, at gage datum 2.00 ft lower.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 5,730 ft³/s, Jan. 10, 2017, gage height, 10.31 ft; no flow at times during some years.
PERIOD OF RECORD
CONTINUOUS WATER-QUALITY DATA:
WATER TEMPERATURE: Water years October 2008 to current year.
INSTRUMENTATION - Water-quality monitor since October 2008.
EXTREMES FOR PERIOD OF RECORD - WATER TEMPERATURE: Maximum recorded, 24.4°C, August 16, 2020; minimum recorded, -0.2°C, Nov. 27, 2015.