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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2024
11173510 Alameda Creek below Calaveras Creek, near Sunol, CA
LOCATION - Lat 37°30'13", long 121°49'25" referenced to North American Datum of 1927, in NE 1/4 NE 1/4 sec.13, T.5 S., R.1 E., Alameda County, CA, Hydrologic Unit 18050004, on right bank, 0.2 mi downstream from Calaveras Creek, 1.1 mi downstream from Calaveras Dam, and 7.3 mi southeast of Sunol.
DRAINAGE AREA - 139 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1995 to current year. October 1995 to September 2006 (low-flow records only).
GAGE - Water-stage recorder. Datum of gage is 429.83 ft above NAVD of 1988.
REMARKS - Flow regulated by Calaveras Reservoir, usable capacity, 96,800 acre-ft, 1.1 mi upstream from gage and by diversion dam on Alameda Creek, 2.9 mi upstream. Dead storage, 3,200 acre-ft. Flow is diverted out of basin from Calaveras Reservoir by city and county of San Francisco for domestic use. See schematic diagram of Alameda Creek Basin available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 5,220 ft³/s, Jan. 10, 2017, gage height, 12.18 ft; minimum daily discharge, 0.02 ft³/s, Oct. 8, 11-14, 2004, and Oct. 3, 2008.
WATER-QUALITY RECORDS
PERIOD OF RECORD -
CONTINUOUS WATER-QUALITY DATA:
WATER TEMPERATURE: Water years October 2008 to current year.
INSTRUMENTATION - Water-quality monitor since Oct. 1, 2008.
REMARKS - Interruptions in record are due to malfunction of recording and/or sensing equipment. Water temperature record for 2014-2016 water years rated excellent. The practice of assigning qualitative accuracy ratings to water-quality data was discontinued in WY2017.
EXTREMES FOR PERIOD OF RECORD - WATER TEMPERATURE: Maximum recorded, 28.1°C, July 4, 2013; minimum recorded, 2.8°C, Dec. 10, 2013.
