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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.
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USGS Water-Year Summary 2025
09522500 GILA GRAVITY MAIN CANAL AT IMPERIAL DAM, AZ-CA
LOCATION - Lat 32°52'34", long 114°27'18" referenced to North American Datum of 1927, in SE 1/4 SW 1/4 sec.30, T.6 S., R.21 W., Yuma County, AZ, Hydrologic Unit 15030107, Gila and Salt River meridian, on left bank 0.8 mi downstream from intake at east end of Imperial Dam.
SURFACE-WATER RECORDS
PERIOD OF RECORD - August 1943 to current year.
GAGE - Water-stage recorder. Datum of gage is 162.16 ft above NAVD of 1988.
REMARKS - Record is rated good. Gila Gravity Main Canal diverts water from Colorado River at Arizona abutment of Imperial Dam for irrigation of lands in the Gila Project area in Arizona. Diversions to this canal began August 17, 1943. Diversions to North Gila Valley from this canal began December 16, 1954.
EXTREMES FOR PERIOD OF RECORD - Maximum daily discharge, 2,240 ft³/s, May 25, 1965; no flow at canal intake at times in several years when intake gates were closed.
