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Water-Year Summary for Site USGS 11151870

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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.
Available Parameters
00060 Discharge(Mean)  

Water year 2021: 2021-10-01 to 2022-09-30

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USGS Water-Year Summary 2021
11151870 Arroyo Seco near Greenfield, CA
LOCATION - Lat 36°14'15", long 121°28'50" referenced to North American Datum of 1927, in NE 1/4 SE 1/4 sec.36, T.19 S., R.4 E., Monterey County, CA, Hydrologic Unit 18060005, in Mt. Diablo meridian, on right bank, 0.6 mi downstream from Rocky Creek, and 14.5 mi southwest of Greenfield.
DRAINAGE AREA - 113 mi².
PERIOD OF RECORD - Water year 1961 to current year (1987 to 2019 only discharge measurements and annual peaks). Starting WY2020 site is full range seasonal from October through April. WATER TEMPERATURE: Water years 1963-75, 1978-84. SEDIMENT DATA: Water years 1962-84 (revised).
GAGE - Datum of gage is 778.10 ft above NAVD of 1988.
REMARKS - No regulation or large diversion upstream from station. Low flows affected by beaver activity and swimmers dams throughout the reach.