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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.
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USGS Water-Year Summary 2025
11176340 Arroyo De La Laguna at Corte Madrid near Pleasanton, CA
LOCATION - Lat 37°40'05.9", long 121°54'33.9" referenced to North American Datum of 1983, Alameda County, CA, Hydrologic Unit 18050004, in Santa Rita Grant, at right bank, 0.47 mi upstream of Arroyo Valle, 0.26 mi downstream of Pleasanton Canal, and 1.9 mi northwest of Pleasanton.
DRAINAGE AREA - 222 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - December 2022 to current year.
GAGE - Water-stage recorder. Datum of gage is 289.69 ft above NAVD of 1988.
REMARKS - No regulation or large diversions upstream.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 15,200 ft³/s, Dec. 31, 2022, gage height, 30.23 ft. Minimum daily discharge, 3.82 ft³/s, Sep. 10, 2023.
