USGS Water-Year Summary 2018
09427520 COLORADO RIVER BELOW PARKER DAM, AZ-CA
LOCATION - Lat 34°17'44", long 114°08'22" referenced to North American Datum of 1927, in NW 1/4 NW 1/4 sec.03, T.2 N., R.27 E., San Bernardino County, CA, Hydrologic Unit 15030104, San Bernardino meridian, on north end of powerplant at Parker Dam, 13 mi northeast of Parker, AZ, and 14 mi upstream from Headgate Rock Dam.
DRAINAGE AREA - 182,700 mi² of which 4,000 mi² probably is noncontributing, The noncontributing area is the Great Divide basin in southern Wyoming.
PERIOD OF RECORD - Feb. to Sept. 1934 (gage heights and fragmentary discharge records), Oct. 1934 to current year. Prior to Oct. 1937, published as near Parker, Ariz.
GAGE - Water-stage recorder.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 42,400 ft³/s Feb. 8, 1937; no flow at Parker Dam for parts of several days in 1942 when gates in dam were closed. An unregulated discharge of probably less than 1,350 ft³/s occurred Aug. 18, 1934 (lowest unregulated discharge since 1917 and probably since a much earlier date).
PERIOD OF RECORD - Oct. 1963 to current year.
PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: Sept. 1982 to Sept. 2000.
WATER TEMPERATURES: Feb. 1954 to Aug. 1970, Sept. 1982 to Sept. 2000.