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
11151870 Arroyo Seco near Greenfield, CA
LOCATION - Lat 36°14'15", long 121°28'50" referenced to North American Datum of 1927, in SW 1/4 NE 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.
SURFACE-WATER RECORDS
PERIOD OF RECORD - Water year 1961 to current year (1987 to 2019 only discharge measurements and annual peaks) (starting October 2019 site is full range, seasonal record 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.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 33,300 ft3/s, Jan, 9, 2024, gage height, 14.82 ft. Maximum gage height, 16.34 ft, Feb. 7, 1978; no flow at times.
