Warning: Javascript must be enabled to use all the features on this page!

Page Loading - Please Wait...

Click to hideNews Bulletins

Water-Year Summary for Site 11181000

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.
Available Parameters
00060 Discharge(Mean)  

Water year 2017: 2016-10-01 to 2017-09-30

Print this page
USGS Water-Year Summary 2017
11181000 San Lorenzo Creek at Hayward, CA
LOCATION - Lat 37°41'08", long 122°03'48" referenced to North American Datum of 1927, Alameda County, CA, Hydrologic Unit 18050004, in San Lorenzo Grant, on left bank, 300 ft downstream of Center Street Bridge, just outside city limits of Hayward, 0.6 mi downstream from Crow Creek, and 1.0 mi downstream from Don Castro Dam.
DRAINAGE AREA - 37.5 mi².
REVISIONS HISTORY - WSP 1315-B: 1947 (instantaneous maximum discharge), 1949 (instantaneous maximum discharge). WSP 1345: 1940 (instantaneous maximum discharge). WSP 1715: 1947.
PERIOD OF RECORD - January 1940 to September 1940, October 1946 to April 1983, October 1997 to current year. Monthly discharge only for some periods, published in WSP 1315-B.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 133.16 ft above NGVD of 1929. January to September 1940, nonrecording gage on bridge 0.1 mi upstream at present datum.
REMARKS - Flow partly regulated since October 1962 by Cull Creek Reservoir, capacity, 310 acre-ft, and since January 1965 by Don Castro Reservoir, 1.0 mi upstream, capacity, 380 acre-ft. A few very small diversions above station for irrigation.

• Water Years 2014-2016: Records good below 100 ft³/s, otherwise fair.
• Water Year 2017 Records good.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 8,140 ft³/s, Feb. 3, 1998, gage height, 21.85 ft; no flow at times.