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<br />,--- <br /> <br />001508 <br /> <br />..21- <br /> <br />/OJ <br /> <br />hoMcver storage oapaoi tj'" will be needed when the uselF of water and deple tions <br />of streamflows above we Ferry have reaohed' the quantity heretofore apporti oned <br />to the Upper Besin by the Colorado River ComlRot. This is neoessary to insure <br />that flows at Lee Ferry will not be depleted below. an aggregate of 75,000,000 <br />ac~ feet fo~ any perioa of ~en oonseoutiv~ years, suoh as 1931-19401 and <br />they should also be advised ae to what the reservoir losses at that stage. of <br />development might total. Likewise, they should be informed that, when the <br />16,270,000 e.ore feet of virgin floVl at Lee Ferry has been depleted by <br />7.500,000 aore feet, inoluding upstream reservoir losses, the remaining flow. <br />at Lee Ferry might be equated to a flow. of 8,770,000 aore feet, provided <br />that suffioient reservoir oapaoity be oonstruoted and operated for holdover <br />stor~ge and streamflow regulation purposes; and they should be informed as <br />to the possibilities for oonstruoting the required reservoir oapaoities, as <br />well as oonoerning the losses involved. <br /> <br />0() <br /> <br />The Report indioates that any studiee made in oonneotion with these <br />so_oalled potential reservoire appear to have been devoted to their assumed <br />operatione primarily for power purposes. The total power produotion at all <br />the reservoirs will greatly exoeed the needs for power in the natural drainage <br />basin above Lee Ferry for forty years, aooording to the foreoast oontained <br />in the Report. The Report proposes to market this surplus power, in part, <br />in areas outside the natural basin in Uoah and Colorado (whioh areas are not <br />oovered by the Report), but mainly in the Lower Basin market arero where power <br />defioienoies are anticipated in the near future. <br /> <br />Colorado points out that projeots, under oonstruotion and proposed in <br />Colorado, for diverting waters of the Colorado River Symtem fcr irrigation <br />use and for munioipal and industrial purposes in the South Platte and <br />Arkansas River valleY$ in eastern Colorado, _ being areas within the <br />Colorado River Basin as defined in the Colorado River Compaot, .. will also <br />produce. power sufficient in amount for the future needs of eastern Colorado <br />fo.~ many decades in the future. Hence the Report should not oontemplate the <br />r.~rketing in eastern Colorado of surplus power produoed at the reser70ire <br />\:njel!' di scussiono <br /> <br />Ji, <br /> <br />6, Colorado River Water S~pliss Available in the UnitAd Stateso <br />Conolusions of the Report, respectii1g the water supplies of the, Colorado <br />River available in the United States, are based on the flow' of the Colorado <br />Ri vel" al; the Interne:tional Boundary, as oaloula ted for so-oalled virgin <br />oonditions, Starting with the estimated virgin flow at Lee Ferry of <br />]6,,270,000 aore~feet annually, the aggregate. oombined effeot of all <br />tri"outary inflows to the river seotion below' Lee Ferry (Inoluding the Gila <br />River~, and of all natural consumption of water and ohannel losses <br />inoident to the oonveyanc6 of Colorado River w&t~r from Lee Fe~ry, and of <br />Gila River water from the Phoenix vicinity, to the International Boundary, <br />is estimated in the Report to have inoreased the virgin flow' at the <br />International Bound&ry to an ~erage of 17,720,000 aore feet annually. <br />Allowing for a future flow. to Mexioo averaging 1,500,000 acre feet annually, <br />as. required by Treaty, the Report oonoludee that the remaining 16,220,000 <br />aore feet is the water supply of the Colorado River available for depletio~ <br /> <br />Il <br />