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:~ . > " OOll~5 -13- acre-feet, approximately, in case Colorado secures its full allotment or an amount of 700,000 acre-feet in case the Upper Basin States have storage which limits them to 6,200,000 acre-feet, as mentioned in the Hill Report. The San Juan and its tributaries took out of the State of Colorado annually during the years 1931-1940 an amount of 1,652,000 acre-feet; the Dolores, 546,200. _ For the period 1941-1950, the annual outflow from the San Juan ~stem was 1,956,000, and from the Dolores 700,000 acre-feet. " The Hill Report 10. A. "Conclusions "We conclude from review of all available data and from independent analyses that: "1. All of the 7,500,000 acre-feet of water Per annum apportioned to the Upper, Basin by the Colorado River compact may not actually be available for use because of the require- ment that 75 million acre-feet be delivered at Lee Ferry during each consecutive 10-year period. "2. Compliance with this provision and limiting the carry- over in cyclic storage to the 22 years from 1930 to 1952 would have required that reservoirs of 21 million acre-feet capacity had been available in 1927 for cyclic regulation and that the aggregate depletion in the upper basin be no more than 6,200,000 acre-feet per year. "3. The total of all depletions at sites of use in Colorado of the flow of Colorado River and its tributaries may thus be limited to 3,100,000 acre-feet per year. "4. Depletions in Colorado under present cond~tions aggregate practically 1,450,000 acre-feet per year. "5. Commitments for extension of existing projects and for other projects authorized would increase present depletions almost 200,000 acre-feet per year. "6. The present uncommitted surplus which can be relied upon for use in Colorado is thus 1,450,000 acre-feet per year.