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<br />28
<br />
<br />OOLORADO RIVER STORAGE PROJECT
<br />
<br />as the costs of providin~ replacement storage for irrigation4tnd other
<br />upstream water-cimsummg uses equivalent to that at the Glen Canyon,
<br />Flaming Gorge, curecanti, and Navajo units.
<br />After allowanc~s are made for sediment deposition to year 2062 and
<br />minimum operatipg levels for power productIOn, the multiple-purpose
<br />reservoirs at Gle!! Canyon, Flaming Gorge, Curecanti, and Navajo
<br />units will have about 22,443,000 acre-feet of active storage capacity,
<br />The single-purpoee alternative must have an equivalent amount of
<br />active Rtorage capacity, without any specific rescrvation of dead
<br />storage to maintl\in a minimum power pool, after making allowances
<br />for evapomtion losses and sediment depoRition to year 2062. The
<br />lowest cost single-purpose alternative was found to consist of the
<br />Cross Mountain,: Flaming Gorge, Dewey, and Navajo Reservoirs.
<br />To 'assure the initial filling of such alternative reservoirs during the
<br />present period of; incomplete water use in the Colorado River Basin,
<br />they would needi to be constructed under the same schedule as the
<br />authorized multiple-pUl'pose reservoirs.
<br />The lowest cos~ single-purpose replacement storage alternative was
<br />selected by reconnaissance analyses using available data on the
<br />various large res~rvoir sites in the upper basin, The estimated capa-
<br />cities and consttuction costs of the selected alternative system of
<br />reservoirs are sho'wn in the table on the following page,
<br />
<br />Justijiable power expenditure
<br />The justifiable, expenditure for power is taken as the cost of the
<br />most economical single-purpose alternative power development
<br />described on page 29. As previously explained, this same cost is
<br />taken as a measure of the project power benefit. The total annual
<br />costs of the alte~uative development were estimated on the basis of
<br />private financing ~ncluding taxes and interest at the rnte of 6X percent.
<br />The estimated co~ts are summarized below,
<br />
<br /> !
<br /> A verlloge annual
<br /> Item 6qulvalBntoC Present worth ,
<br /> , totDlcost
<br />Cost exolud(ngtBx~s._.___'______,_________________________,___________... $31,583,000 $1,1116,380,000
<br />Taxes.__n._______n__...'_._....._.._______________._..________.__._.___ 8,806,000 822,423,000
<br />TotaL._ .--..-----------------------------------------.._".__-0_- 40,389,000 1,478,803,000
<br /> i
<br />
<br />, ,
<br />1 Computed over B lOo.Y,6W' perIod with Interest at fl!,te ot2}i percent.
<br />
<br />Estimated cost of sih,ole--pu,rpos6 storage alternative-Colorado River: 8torage project
<br />
<br />i
<br /> CrOBB P'lo.mtng Dewey Navo.jo
<br /> MountQtn OOffeDam Dam and Damaod Total
<br /> Demand en Reser. Roo6l'votr Reservoir
<br /> Reservoir VO~
<br />Inlttal aotlve storage Oa~B.QLtY_.....--.....- 5,200,000 3,930,000 9,500,000 1,028,000 19,6118,000
<br />Activo c6pll.olty r6wa[n Il Ln )'61U' 2062. _ _._ 5,160,000 8,730,000 8,OQO, 000 948,000 17.838,000
<br />Construotlon cost__n._.._'...___..______.__ $20,205,000 $48,01016,000 $92,850,"000 $4~,833,OOO $203,394,000
<br />Interest during construotl~n 1_____.__...___ 1,139,000 3,24.6,000 7,889,000 2,-403,000 14,177,000
<br />Net Investment by yearc mpleted..un.. 21,0104,000 61,69~OOO 99,730,000 44,736,000 217,571,000
<br />Annual operation, ma.l,ntenallce, end 399,000
<br />replacement costsn___..'u.._..__..______ 104,000 71,000 HIS,OOO 211,000
<br />Present wortb or operBtlo~1 mo.tntenllollce, 2,819,000 1,066,000 915,000 1oi,608,OOO
<br />and replacement costs..~__.nn.u....n 8,808,000
<br />Preselltwortboltotal 008~.__._________._.. 25,212,000 M,5U,OOO 106,805,000 4.11,6111,000 232,179,000
<br />,
<br />
<br />I Oomputed, Bt a-n lnter~t ra-te of 2~ percent.
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