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 11109550

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 2021: 2021-10-01 to 2022-09-30
 

Print this page
USGS Water-Year Summary 2021
11109550 Piru Creek above Frenchmans Flat, CA
LOCATION - Lat 34°37'51", long 118°44'51" referenced to North American Datum of 1927, in NW 1/4 NW 1/4 sec.11, T.6 N., R.18 W., Los Angeles County, CA, Hydrologic Unit 18070102, on right bank of concrete-lined channel beside old highway 99, 1.0 mi north of Frenchman's Flat, 1.5 mi downstream from Pyramid Lake Dam, and 12.5 mi north of Castiac.
DRAINAGE AREA - 308 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1976 to September 1978, November 2004 to current year (high flow, seasonal records only). December 1963 to September 1976 in files of California Department of Water Resources. SPECIFIC CONDUCTANCE: Water years 1972-80.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 2,130 ft above NGVD of 1929, from topographic map. December 1963 to September 1978, at site 0.2 mi downstream at datum 30 ft lower.
REMARKS - Flow regulated by Pyramid Lake (station 11109520). Station is used to monitor releases from Pyramid Lake into Piru Creek River Basin. See schematic diagram of Santa Clara River Basin available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 36,000 ft³/s, estimated, Feb. 25, 1969, by California Department of Water Resources; no flow Jan. 1-18, 1974.
WATER-QUALITY RECORDS
PERIOD OF RECORD - Water years 1972-80, Specific Conductance.