Click
to
hide
Water-Year
Summary
instructions
and
information
- 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
11174600 Alamo Canal near Pleasanton, CA
LOCATION - Lat 37°41'40", long 121°55'10" referenced to North American Datum of 1983, Alameda County, CA, Hydrologic Unit 18050004, on right bank, 1.3 mi upstream from confluence with Arroyo Mocho, and 3.3 mi northwest of Pleasanton.
DRAINAGE AREA - 39.5 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1979 to September 1983, October 29, 2014 to current year.
GAGE - Water-stage recorder and crest-stage gages. Datum of gage is 306.61 ft above NAVD of 1988.
REMARKS - No regulation or large diversions upstream.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 4,480 ft³/s Jan. 5, 1982, gage height, 17.50 ft, datum then in use, discharge from rating curve extended above 150 ft³/s on basis of slope-area measurement of maximum flow; minimum daily, 0.27 ft³/s Oct, 14, 1979. In current datum, Maximum discharge, 6,310 ft³/s Dec. 31 2022, gage height, 19.36 ft; minimum daily, 0.47 ft³/s Sep, 23, 2015.
WATER-QUALITY RECORDS
PERIOD OF RECORD -
DISCRETE WATER-QUALITY DATA:
CHEMICAL DATA: Water years 1975 to September 1983.
CONTINUOUS WATER-QUALITY DATA:
SPECIFIC CONDUCTANCE: Water years October 1979 to September 1983.
SEDIMENT DATA: Water years December 2016 to September 2022.
