4001

• UCREFRP Catalog Number: 4001
• Author: U.S. Bureau of Reclamation.
• Title: Colorado River System Consumptive Uses and Losses Report 1976-1980.
• USFW Year: 1981.
• USFW - Doc Type: Washington, D.C.
• Copyright Material: NO

TABLE LC-1
Lower Colorado River Basin
Colorado River Mainstream Estimated Reservoir Evaporation and Channel Loss 1 ~
1976-1980
(1,000 acre-feet)
Reservoir Evaporation Apparent Channel Losses?/ Total Reservoir
Lake Lake Lake Senator Wash Lee Ferry Hoover Dam Evaporation and
Water Year Mead Mohave Havasu Reservoir Other?/ Total To Hoover Dam to IB Total Channel Loss
1976 862 177 128 2 40 1,209 40 50 90 1,300
N 1977 817 181 138 2 36 1,174 200 (-110) 90 1,260
1978 713 154 120 2 32 1,021 160 180 340 1,360
1979 747 157 113 2 32 1,051 30 400 430 1,480
1980 816 165 126 2 35 1,144 (-40) 290 250 1,390
Average 791 167 125 2 35 1,120 80 160 240 1,360
1/ Undistributed by States.
2/ "Other" impoundments include Palo Verde, Headgate Rock, Imperial, Laguna, and Morelos Diversion Dama.
3/ Losses include channel evaporation, seepage, and phreatophyte consumptive use. Note that gauge error of a USGS
"excellent" gage ie 5 percent, or approximately 400,000 acre-feet-per year for the gages at Lee Ferry, Hoover Dam, and
the International Border. Such gage errors may result in the computation of large apparent channel losses.