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<br />Ii <br />,. <br /> <br />o <br />(:-J <br />w <br />~ <br />N <br />I-"' <br /> <br />I. <br /> <br />Ii <br /> <br />,( <br /> <br />30 <br /> <br />DEPLETION OF. SURFACE WATER SUPPLIES <br /> <br />8. Oonsumptive uses by expansion of irrigation on the western <br />slope will depend upon the degree to which new projects are subsidized. <br />Should the subsidy be limited to $200 per acre, the resulting depletion <br />would be no more than 100,000 acre-feet per year. Should subsidies <br />of $400 per acre be given, the stream depletion would be a little more <br />than 400,000 acre-feet per year. Should subsidies as great as $600 <br />per acre be permitted, the resulting stream depletion at sites of use <br />might reach 800,000 acre-feet per year. .'. <br />9. Depletions by new transmountain diversions will likewise d~pend <br />upon the degree to which irrigation agriculture may be subsidized. <br />Some diversions could be financed by municipalities without subsidies, <br />but these would be limited to about 200,000 acre-feet. Additional <br />transmountain diversions for agricultural purposes in any subst!tntial <br />amount would require subsidies in excess of $400 per acre. Even if <br />subsidies as great as $600 per acre were permitted, the total of all new <br />transmountain diversions for all purposes would not be more than <br />300,000 acre-feet per year. . . <br />10. If subsidies to agriculture at any point in Oolorado .be limited to <br />$600 per acre, future depletions caused by expanded irrigation qn the <br />western slope and by transmountain diversions would amoullt to <br />1,100,000 acre-feet per year. .' <br />11. If any greater subsidies were to be allowed, the potential deple- <br />tion caused by consumptive uses in agriculture and industry a:Q.d by <br />transmountain diversions would be in excess of the supply of water <br />available to Oolorado. <br />12. Increased diversions of water for use by agriculture and industry <br />on the western slope and for transmountain diversions will d~pend <br />upon the provision of sufficient storage capacity in reservoirs for con- <br />servation of flood flows and some cyclic regulation; in order that <br />Oolorado may make full use of the water allocated to it by the, com- <br />pacts, cyclic regulation of Oolorado River over periods longer'than <br />20 years will also be necessary. <br /> <br />o <br /> <br />~.:,),.. '<:" ~ :7<. .._ ,A,A :"':"~" ::.."<.:.. < <br /> <br />~.." <br />"', , .,. <br /> <br />'. <br /> <br />~l::. . <br /> <br />,,". ' <br />