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<br />0011411 <br /> <br />-22- <br /> <br />Basin, and should be treated a.s a list of development possibilities from <br />which each state may make such selections as ultimately may be required <br />to avoid exceeding the rights of the Upper Basin and of the states of the <br />Upper Division under the Colorado River Compaot. <br /> <br />"J <br /> <br />39. For purposes of discussion, the depletions of potential Upper <br />Basin projects may be segregated and considered in three categoriesl <br /> <br />. <br /> <br />(1) irrigation projects within the mtural basin, for the re- <br />c lamation of "new lands" (or lands not now irrignted). and to provide sup- <br />plemental water supplies for lands now inadequately irrigated; <br /> <br />servoirs. <br /> <br />(2) export diversions for use outside the natural basin; and, <br /> <br /> <br />(3) evaporation losses from main-stem power and regula.tion re- <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 which Colorado approves. Thereunder the depletions <br />of irrigation projeots are charged against the state in whioh the bene- <br />fited aoreages are located; the depletions of exportation projects <br />against the State in which the ,.....ter is used; and the depletions of main- <br />stem power and regulation reservoirs are not segregated by States. since <br />their benefits to power and v~ter users, upstream and downstream there- <br />from, cannot now be antioipated. Their depletions are entered, for the <br />present, against the basin in which the reservoirs are located, and Colo- <br />rado approves of th,t temporary arrangement, subjeot to such revisions <br />as may be diotated by determinations of the locations of benefits men <br />and after such reservoirs are constructed. <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 />construotion, Colorado suggests that their depletions be estimated and <br />shovll in the Report. Using rates employed by the Bureau at: Reclamation <br />for estimating the future depletions of potential irrigation projeots. <br />and exportation quantities hereinafter defined. Colorado engineers have <br />estimated the depletions of said initial list of Upper Basin projects at <br />2,631,000 acre foot in a year of normal climatic conditions, and at <br />2,174,000 acre. feet in a year of drouth conditions such as 1931-1940. <br />Both averages inc lude the allowances of the Report for projects now <br />authorized and under construction in the Upper Basin. The recorded flow <br />at Lee Ferry during 1931-1940 averaged 10,167,000 aore foot per year. <br />That unconsumed outflow from the Upper Basin remained after all then <br />existing depletions upstream from Lee Ferry had taken their toll of wa- <br />ter. During a period in the future similar to 1931-1940, should such <br />a period oocur after the projects noVl aul;horized and under construction <br />are completed, and after the said initial list of projects have been con- <br />structed, the flow at Lee Ferry will amount to 10,167,000 minus 2,174,000 <br />or 7,993,000 acre feet per year. or to 79,930,000 acre feet in the as- <br />sumed ten-year period. Since that quantity e;:ceeds the delivery Obliga- <br />tions of 75,000,000 acre feet imposed by Art. III (d) of the ColoradO <br /> <br />. <br />