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Ou0399 -10- cycle prior to the time when any of the waters vrere diverted, used or stored. ::>ince "virgin floVls" are outflows from the drainage basin, and since natural losses are not considered in their calculations, tl'e "virgin flori" quanti- ties do not represent the streamflows oriGinally croated by natural precipi- tation over too draina~-e basin, or the streamfloVls produced by the runoff from natural precipitation. "Vire;in flows" are necessarily less than the oriGinal streamflows by whatever amounts of water are consumed by natural processes of evaporation and transpiration. incident to its conveyance down- stream to the point ,',here outflows are measured and "virgin flows" are evaluated. Colorado soys that natural losses should be ta:<en into account, and that information concerning the extent of natural losses under so-called "virgin conditions" is necessary, and should be added to the estimated "virgin outflows." in order to determine or estimate the amounts of the orig- inal streamflows of the Colorado River system. Colorado points out that so- called "depletions" have been estimated and appear in the Report for so- called "present conditions" and for those conditions which may prevail in the future if and when all the potential projects listed in too Report are constructed; that such present and potential "depletions" are segregated by basins and States; and that data concerning the amounts and sources of the original streamflows by basins and States are neoessary to completo the Re- port. and to prevent an incomplete Report from being misleading to the point of being unfair and adverse to the interests of the Stntes of the Up- per ~ivision, and particularly to the State of Colorado. 23. The Report. at page 19. saysl "Under virgin conditions the River wns a growing stream throughout its course until it reached the 3lacl< Can- yon secticn (site of Boulder Dam) below which the stream vas depleted. except at times of Great flood. by evaporation losses in the desert region;" and that virgin flows at varicus points ha....e been estimated by the Bureau of Reclamation. as folloWXI -..STUiATED FLO\-l - VIRGIN COllDIT:;' 'NS Stream Location Average Annual Flow (Acre-Feet) . Green River ColoradO River ColoradO River Li tt Ie Colorado Virgin River Colorado River Gila River Gila River at mouth above mouth of Green River Lee Ferry near the mouth Littlefield Laguna Dam Dame near Phoenix 5.903,000 7 ,2fl9 ,000 16,271,000 338,000 310 ,000 16,451,000 1.271,000 2,282,000 * * From text (page 19). Directing attention to the question of natural losses. the amounts of which are not shovln in the Report. Colorado points out thatl