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<br />0" 1'" 7 <br />U, 'fl <br /> <br />-11- <br /> <br />9. Summary. Upper Basin Present and Potential !)3pletionsl <br /> <br /> (Units 1000 AF) <br /> Wyo'. Colo. utah N. l1e x. Ar iz. Total <br />Present 362 1.476 5'Zl 68 7 2.440 <br />II <br />Potential, <br />Irrigation 298 912 288 308 39 1.845 <br />Exportations 1'Zl 1.037 (a) 369(b) 247(c) 0 1.780(d) <br />Oombined 425 1.949 657 555 39 3.625 <br />Total Ultimate 787 3 .425 1.184 623 46 6.065 <br />Allowance fer main river reservoir loss 831 <br />Total Upstream Depletions 6,896(e) <br /> <br />NOTE (14), This table differs from Report (p. 188 etc.) in several items as <br />follows, <br /> <br />(a) Figure of 1289 wrongly char ges Oolorado with San Juan-Chama <br />diversions. <br /> <br />(b) Figure of 376 wrongly includes 7,000 AF to San Juan fNm <br />Grand diversions. <br />(c) Figure of 0 results from charging San Juan-Chama to Oolorado. <br />(d) Figure of 1792 exceeds 1780 by 12. <br />(e) Adding 12 gives 6908 as previously used in Report. <br /> <br />10. l)opletions in State of Colorado, <br /> <br />. <br /> <br />NOTE (15), Estimates by U.S.B.R. of present and potential depletions in the <br />Upplr Basin are based on drouth conditions such as prevailed in <br />1931-1940. which is the lowest decade of record from the stand- <br />point of precipitation. streamflows and water supplies. ,fuile <br />no one can say with certainty that an even lower cycle will not <br />occur in the future, neither can anyone predict when an equivalent <br />cycle will again occur, if ever. <br /> <br />, <br /> <br />U.S .B.R. estimates of pre sent and potential depletions in the <br />State of Coa.orado are not directly comparable with estimates by <br />this office, which appear in the Statement of July 20. 1944. and <br />which were based on normal, or long-time average. conditions. How- <br />ever, for purposes of explanation and comparison one might assume <br />that depletions during a drouth cycle such as 1931-1940 were 8ay, <br />of normal. On this basis the ultimate depletions in Colorado. <br />including west slope irrigation and exportations, which were es- <br />timated by this office at 4.600,000 acre feet, would amount to 80% <br />