USGS Water-Year Summary 2023
11173200 Arroyo Hondo near San Jose, CA
LOCATION - Lat 37°27'42", long 121°46'06" referenced to North American Datum of 1927, in NE 1/4 NE 1/4 sec.32, T.5 S., R.2 E., Santa Clara County, CA, Hydrologic Unit 18050004, on right bank, 150 ft upstream from road bridge, 3.5 mi southeast of Calaveras Dam, and 3.5 mi northeast of city limits of San Jose.
DRAINAGE AREA - 77.1 mi².
REVISIONS HISTORY - Suspended Sediment Concentration (daily mean) and Suspended Sediment Discharge (daily mean) for the period Mar. 10, 2022 to May 18, 2022 were revised on Sep. 6, 2023 based on additional results.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1968 to September 1981, October 1994 to current year.
GAGE - Water-stage recorder. Datum of gage is 783.86 ft above NGVD of 1929 and 786.83 ft above NAVD of 1988.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 7,480 ft³/s, Jan. 10, 2017, Maximum gage height, 15.85 ft, Feb. 3, 1998; minimum daily, 0.07 ft³/s, Aug. 1-3, 2014 and Sep. 16-17, 2014.
WATER-QUALITY RECORDS
PERIOD OF RECORD -
DISCRETE WATER-QUALITY DATA:
CHEMICAL DATA: Water years 1977.
SEDIMENT DATA: Water years March 2021 to current year (storm season only).
CONTINUOUS WATER-QUALITY DATA:
WATER TEMPERATURE: Water years September 2008 to current year.
SPECIFIC CONDUCTANCE: Water years March 2021 to current year (storm season only).
pH: Water years March 2021 to current year (storm season only).
DISSOLVED OXYGEN: Water years March 2021 to current year (storm season only).
TURBIDITY: Water years March 2021 to current year (storm season only).
FLUORESCENT DISSOLVED ORGANIC MATTER: Water years March 2021 to current year (storm season only).
SUSPENDED-SEDIMENT DISCHARGE: Water years March 2021 to current year (storm season only).
INSTRUMENTATION - Water-temperature recorder since September 2008.