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USGS Water-Year Summary 2025
09427500 LAKE HAVASU NEAR PARKER DAM, AZ-CA
LOCATION - Lat 34°18'58", long 114°09'23" referenced to North American Datum of 1927, in NW 1/4 SW 1/4 sec.28, T.3 N., R.27 E., San Bernardino County, CA, Hydrologic Unit 15030101, San Bernardino meridian, at intake pumping plant for Colorado River aqueduct of Metropolitan Water District of Southern California, 1.8 mi upstream from Parker Dam on Colorado River, and 149 mi downstream from Hoover Dam.
DRAINAGE AREA - 182,700 mi² of which 4,000 mi² probably is noncontributing. Great Divide basin in southern Wyoming is noncontributing.
REVISIONS HISTORY - WRD Ariz. 1975: 1974 (elevation).
SURFACE-WATER RECORDS
PERIOD OF RECORD - July 1938 to current year. Published as "Parker Reservoir near Parker Dam" 1938.
GAGE - Water-stage recorder. Datum of gage is sea level.
REMARKS - Record is good except for estimated days which are fair. Lake Havasu is formed by Parker Dam; this concrete-arch dam was completed and storage began July 1, 1938. Usable capacity, based on April 1957 re-survey by U.S. Bureau of Reclamation between elevations 430.54 ft and 450.54 ft, 619,400 acre-ft between elevations 400.54 ft (sill of regulating gates) and 450.54 ft (top of regulating gates). Prior to October 1, 1956, different capacity table used. Dead storage, 28,600 acre-ft below elevation 400.54 ft, based on original survey. About 0.07 ft fall indicated between gage and Parker Dam under normal operating conditions. Drawdown below elevation 440.54 ft not legally permissible except by consent of the Metropolitan Water District of Southern California or in an emergency affecting the safety of the dam. Lake is used for flood control, power development, regulation of river for irrigation demand, and as a basin from which water is pumped by Metropolitan Water District of Southern California and the Central Arizona Project. Figures given herein represent usable contents. For record of diversion to Colorado River aqueduct or CAP canal, see record for Colorado River aqueduct near Parker Dam or CAP Canal at Havasu Pumping Plant, contained elsewhere in this report.
EXTREMES FOR PERIOD OF RECORD - Maximum storage, 693,000 acre-ft, by temporary use of flashboards, April 18, 1943, June 4, 1953; maximum elevation, 451.23 ft. May 27, 1988, affected by wind; minimum storage, 71,400 acre-ft June 25, 1942, elevation, 412.09 ft.
