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- OlJl135 . . mountain diversions will depend upon the provision of sufficient storage capacity in reservoirs for conservation of flood flows and some cyclic regulation; in order that Colorado may make full use of the water allocated to it by the compacts, cyclic regulation of Colorado River over periods longer than twenty years will also be necessary." B. Reclamation Report on Water Available to 2Yr Project The report of H. P. Dugan of the Hydrology branch of the Bureau of Reclamation dated October 8, 1953, shows that the amount of water available at Granby Reservoir for trans- port through the tunnel to the Eastern Slope, based on the last 10 years, is the average of 278,100 acre feet annually, instead of the assumed 320,000 acre feet. Even this would be diminished if we would have to stop diverting water,at Granby Dam on the Colorado River, due to earlier downstream priorities. We maintain that if there has to be such a cessation of diversion from the Colorado from trans-mountain use, Denver should not be relieved by being given a priority ahead of the district users. The Denver effort calls all the more for District defence since, by Senate Document 80, on which the first Congressional construction appropriation for the Colorado- Big Thompson project was obtained in 1937, it is provided that "if an o,bligation is created under the Colorado River Compact to augment the supply of water from the State of Colorado to satisfy the provisions of said compact, the diversions for the benefit of the Eastern Slope shall be discontinued in advance of any Western Slope appropriations." Senate Document 80 makes the promise "No releases from Granby Dam for any reason" Blue River Supplies are its buffer. It is demonstrated that the water supply for the Lower Basin is substantially less than that counted on at the compact. -27- ,--- -- -_.~