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<br />001454 <br /> <br />-22- <br /> <br />Basin., and should be treated as a list of development possibilities from <br />which each State may make such seleotions as ultimately may be required <br />to avoid exceeding the rie;hts of the Upper Basin and of the States of the <br />Upper Division under the Colorado River Compaot. <br /> <br />. <br /> <br />39. For purposes of disoussion. the depletions of potential Upper <br />Basin projects may be segregated and considered in three categoriesl, <br /> <br />(I) irrigation projeots within the natural basin. for the re- <br />olamation of "new lands" (or lands not now irrignted). and to provide sup- <br />plemental vater supplies for lands now inadequately irrigated; <br /> <br />(2) export diversions for use outside the natural basin; and. <br /> <br />(3) evaporation los ses from main-stem pOWlr and regulation re- <br /> <br />servoirs. <br /> <br />Under the plan outlined in the Report it appears that depletion <br />charges are made in accordance with the location of the resulting bene- <br />fits. - a formula. of v.hich Colorado approves. Thereunder the depletions <br />of irrigation projeots are oharged against the State in v.hioh the bene- <br />fited acreages are located; the depletions of exportation projects <br />a@;ainst the State in which the water is used; and the depletions of main- <br />stem power and regulo.tion reservoirs are not segregated by States, sinoe <br />their benefits to p'Jwer and water users. upstream and domstream there- <br />fram. oa~ot now be anticipated. Their depletions are entered.'for the <br />present. against the basin in which the reservoirs are looated.'o.nd Colo- <br />rado approves of that temporary arrangement. subject to such revisions <br />as may be diotated by determino.tions of the looations of benefits ffien <br />and after such reservoirs are construoted. <br /> <br />. <br /> <br />40. Considering, that group of potential Upper Basin projeots which <br />previously herein were designated the "initial list". or next stage of <br />construction. Colorado suggests that their depletions be estimated and <br />shom in the Report. Using rates employed by the Bureau or Reclamo.tion <br />for estimating the future depletions of potential irrigation projects.' <br />and exportation quantities hereinafter defined. Colorado engineers have <br />estimated the depletions of said initial list of Upper Basin projects o.t <br />2,631.000 acre feet in a year of normal climatio oonditions, and at <br />2,174,000 aore, feet in a year of drouth conditions such as 1931-1940. <br />Both averages ino lude the allowanoes of the Repcrt for projects now <br />authorized and under oonstruotion in the Upper Basin. The reoorded flow~ <br />at Lee Ferry during 1931-1940 averaged 10.167,000 aore feet per year.:it::; <br />That unconsumed outflow from the Upper Basin remained after all then ' <br />exist ing depletions upstream from Lee Ferry had taken their toll of wa- <br />ter. During a period in the future similar to 1931-1940. should suoh <br />a period ocour after the projects now authorized and under construction <br />are oompleted, and after the said initial list of projects have been con- <br />struoted. the flow at Lee Ferry will amount to 10,167.000 minus 2.174;000 <br />or 7.993.000 aore feet per year, or to 79.930,000 aore feet in the as- <br />sumed ten-year period. Sinoe that quantity e:roeeds the deli very obliga- <br />tions of 75,000,000 acre feet imposed by Art. III (d) of the Colorado <br />