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<br />APPEi~1)IX TO
<br />ANi1UAL REPOTIT
<br />COLORADO RIVER BOAnD OF CALIFORI'lIA
<br />
<br />YGar Ending DGc:e;!lber 31, 1974
<br />
<br />This appGndix presents data which supplements the Board's 1974
<br />Annual Report.
<br />
<br />nInR OPERATIOi-l
<br />
<br />IJater Supply
<br />
<br />During the 1973-741'Tater year (October 1 through September 30),
<br />3,270,000 acre-fcGt flOWGd past LeG Ferry, the Colorado River Compact
<br />point. The major Upper Basin rGservoirs, FontGnGlle plus the CRSP
<br />Reservoirs, increasGd in storage by 605,000 acrG-fGet while other USBR
<br />resel'voirs and the transbasin diversion reservoirs decreased in storage
<br />by 362,000 acre-feet, for a net increase of 221,000 acre-feet. After
<br />adjusting for these reservoir changes, the flow at Lee Ferry would
<br />have been 3,491,000 acrG-feet. The Bureau of Reclamation estimates
<br />that if there had been no man-made depletions upstream, the virgin
<br />flo\! of the Colorado River at Lee Ferry would have been about 12,:316,000
<br />acre-feet.
<br />
<br /> \'Jater Year
<br /> 1964-65
<br /> 1965-66 .
<br /> 1966-67
<br /> 1967-63
<br /> 196::5-69
<br />" 1969-70
<br /> 1970-71
<br /> 1971-72
<br /> 1972-73
<br /> 1973-74 . .
<br /> Total . . ., .
<br /> 10-year average
<br />
<br />The 1973-7/, 'Irater year 'lIas the twelfth year since the closing of
<br />Glen Canyon Dam. In the last ten years, 33,553,000 acre-feet passed
<br />Lee Ferry. Thus, the obligation of Article III Cd) of the Colorado
<br />River Compact vas met, i. e., that the states of the Upper Division
<br />shall not cause the flow of the Colorado RivGr at Lee Ferry to be
<br />depleted below an aggregate of 75,000,000 acre-feet for any period
<br />of ten consGcutive years. A year-by year breakdrn"n follows:
<br />
<br />Flo1'1 at
<br />Lee Ferry
<br />(acre-feet)
<br />
<br />10,335,000
<br />7,370,000
<br />7,823,000
<br />3,35$,000
<br />3,350,000
<br />3,633,000
<br />3,574,000
<br />9,149,000
<br />10,123,000
<br />3,233,000
<br />
<br />.
<br />
<br />. .
<br />
<br />33,553,000
<br />3,355,000
<br />
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