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


Page Loading - Please Wait...

* We've detected you're using a mobile device. Find our Next Generation Station Page here.
Click to hideNews Bulletins

Water-Year Summary for Site 11101250

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 2023: 2022-10-01 to 2023-09-30
 
Print this page
USGS Water-Year Summary 2023
11101250 Rio Hondo above Whittier Narrows Dam, CA
LOCATION - Lat 34°03'30", long 118°04'15" referenced to North American Datum of 1927, in sec.00, T.1 S., R.11 W., Los Angeles County, CA, Hydrologic Unit 18070105, in Potrero Grande Grant, on right bank, 0.3 mi downstream from Garvey Avenue, 0.4 mi downstream from Rubio Wash, 2.8 mi upstream from axis of Whittier Narrows Dam, and 2.2 mi west of El Monte.
DRAINAGE AREA - 91.2 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - February 1956 to current year.
GAGE - Water-stage recorder and concrete-lined trapezoidal channel. Datum of gage is 219.95 ft above NAVD of 1988.
COOPERATION - Records of diversion provided by the Los Angeles County Department of Public Works.
REMARKS - Flow regulated by Big Santa Anita, Sawpit, and Eaton Flood-Control Reservoirs, and Sierra Madre, Las Flores, and Rubio debris basins, combined capacity, 2,195 acre-ft. Many diversions upstream from station for domestic use and irrigation. Los Angeles County Department of Public Works diversion from San Gabriel River below Santa Fe Dam (11085000) to Rio Hondo during water year:
 2014 - no diversion
 2015 - no diversion
 2016 - 801 acre-feet
 2017 - 53,700 acre-feet
 2018 - 6,480 acre-feet
 2019 - 50,100 acre-feet
 2020 - 34,500 acre-feet
 2021 - 6,360   acre-feet
 2022 - 17,700 acre-feet
 2023 - 96,100 acre-feet
See schematic diagram of San Gabriel River and Los Angeles River Basins available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 18,200 ft³/s, Feb. 16, 1980, gage height, 7.35 ft; no flow at times in some years.