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<br />, Export Diversions
<br />From Colorado River Syatem
<br />For Use in Colorado
<br />(Aore Feet)..
<br />
<br />, U.S.B.R.
<br />
<br />C.W.C.B.
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<br />Existing Export Diversions
<br />
<br />102,000
<br />
<br />1~5,OOO
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<br />Allowanoes,ror Projeots now
<br />authorized, under oonstruotion
<br />and in operation 420,000
<br />
<br />Potential Projeots (inorease) 1,267,000
<br />
<br />494,000
<br />1.626,000 (a)
<br />2,255,000
<br />
<br />Totals 1,789,000
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<br />... Quantities based on long-time average or normal conditions, -
<br />in the average year of adrouth oyole suoh as 1931-1940 the
<br />exportations would approximate about 80 percent of normal
<br />quanti ties.
<br />
<br />(a) Estimates as previously disoussed by individual projeots.
<br />Quanti ties have been oheoked with Denver Regi onal offioe ,
<br />for importation&. to Arkansas and South Platte valleys, and
<br />have been taken from Report for importations to San Luis
<br />Valley.
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<br />Colorado suggests that the Report be revised to disolose that
<br />opportunities and probabilities for export diversions fran the Colorado
<br />River system for use in Colorado aggregate. 2,255,000 acre feet annually
<br />under normal olimatio oonditions, and about 1,800,000 aor.e feet annually
<br />,during drouth oyoles suoh as 1931-1940; and that suoh exportation pro-
<br />jects in Colorado have been and are being plaMed and designed upon the
<br />basis that water and power users are expected to repay the oosts of oon-
<br />struotion other than proper non-reimbursable allooations to flood control.
<br />silt control, reoreational benefits, eto. In the event that oompetitive
<br />projects are listed or described in the Report upon a different repayment
<br />basis, Colorado will expect the Report to disolose that expert diversions
<br />from the Colorado River system are limited to quantities above mentioned
<br />by theoonstruotion oosts and repayment requirements of such developments
<br />but that substantially greater amounts of water are possible of exporta-
<br />tion by meanll' of longer tunnele and greater pump-11ftII' if oonstruotion
<br />oosts are to be disregarded or materially subsidized.
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<br />50. The estimates shown in the Report for the depletions in the Up-
<br />per Basin inoident to main-stem reservoir evaporation losses, aggregating
<br />1,040,000 aore reet annually during long-time average or normal oonditions,
<br />and averaging 831,000 acre feet per year during drouth cyolea suoh as 1931-
<br />1940, are not acoompanied by detailed information concerning eithe~ ex-
<br />posed water surface areas or applicable evaporation rates. For that reason
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