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<br />
<br />APPENDIX TO
<br />ANNUAL REPORT
<br />COLORADO RIVER BOARD OF CALIFORNIA
<br />
<br />Year Ending December 31, 1977
<br />
<br />This Appendix presents data which supplements the Board's 1977
<br />Annual Report.
<br />
<br />RIVER OPERATION
<br />
<br />Water SUpply
<br />
<br />During the 1976-77 water year (October 1 through September 30),
<br />8,281,000 acre-feet flowed past Lee Ferry, the Colorado River Compact
<br />point. The major Upper Basin reservoirs, Fontenelle plus the CRSP Reser-
<br />voirs, decreased in storage by 5,535,000 acre-feet while other USBR
<br />reservoirs and the transbasin diversion reservoirs decreased in storage
<br />by 579,000 acre-feet, for a net decrease of 6,114,000 acre-feet. After
<br />adjusting for these reservoir changes and a decrease in reservoir bank
<br />storage of 83,000 acre-feet, the flow at Lee Ferry would have been 2,084,000
<br />acre-feet. The Bureau of Reclamation estimates that if there had been no
<br />man-made depletions upstream, the virgin flow of the Colorado River at Lee
<br />Ferry \'[ould have been about 5,470,000 acre-feet.
<br />
<br />The 1976-77 water year was the fifteenth year since the closing of
<br />Glen Canyon Dam. In the last ten: years, 88,074,000 acre-feet passed Lee
<br />Ferry. Thus, the obligation of Article III(d) of the Colorado River Compact
<br />was met, i.e., that the states of the Upper Division shall not cause the
<br />flow of the Colorado River at Lee Ferry to be depleted below an aggregate
<br />of 75,000,000 acre-feet for any period of ten consecutive years. A year-
<br />by-year breakdo\~ follows:
<br />
<br />1967-68
<br />1968-69
<br />1969-70
<br />1970-71
<br />1971-72
<br />1972-73
<br />1973-74
<br />1974-75
<br />1975-76
<br />1976-77
<br />
<br />Flow at
<br />Lee Ferry
<br />(acre-feet)
<br />
<br />8,358,000
<br />8,850,000
<br />8,688,000
<br />8,571,.,000
<br />9,11,.9,000
<br />10,123,000
<br />8,283,000
<br />9,274,000
<br />8,494.,000
<br />8,281,000
<br />
<br />Water Year
<br />
<br />Total
<br />
<br />88,074,000
<br />
<br />10-year average
<br />
<br />8,807,000
<br />
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