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<br />.........,1..' <br />Expansion of Existing <br />Facilities <br />(Alternative I-D) <br /> <br />The expansion of Chatfield Reservoir <br />to develop upstream mainstem flow <br />was considered in order to illustrate <br />water resources development under <br />this alternative. Assuming the reser- <br />voir Was expanded, an estimated <br />30,800 acre-feet could be delivered <br />for municipal use. <br /> <br />Supply <br /> <br />The average dependable municipal <br />water supply provided by the design <br />project would be 30,800 acre-feet. <br />The return flows from the municipal <br />use of the additional wa ter would be <br />20,600 acre-feet annually, Agricul- <br />tural reuse of return flows four times <br />downstream would provide an addi- <br />tional 5,150 acre-feet of irrigation <br />water deliveries, <br /> <br />Costs <br /> <br />The 1980 cost estimate for construc- <br />tion of the design project is $106 <br />million. The interest cost during con- <br />struction would he $44 million. The <br />aaditional annual costs have not been <br />estimated hecause the facilities in <br />question are now being operated and <br />maintained. <br /> <br />Impacts <br /> <br />The estimated investment required <br />would be a total of $150 million in <br />construction costs and interest dring <br />construction. Net economic benefit <br />would be about -$41 million, <br /> <br />The projected impacls on wildlife <br />and fisheries would represent a mod- <br />erate positive change from present <br />conditions. <br /> <br />DEVELOPMENT <br />OF MOUNTAIN <br />TRIBUTARY <br />FLOWS <br />LARIMER .~ ( <br /> <br />~~~;~REY MO NTAIN t~~\ <br />~. --?') V"" crr A).';,. ~ <br />7' / HOR5ETOOTH),"'~ORT clLLlNS \ WE:) L 0 <br />-?"'7 RE S .--.., ~_ ' ) /.'~+ <br />f' ) \ (IT D) .\ '~~ q:rxCTUS HI4~~( JI B) <br />-., .' ____.." HORSE T OTH '.1 ~/~ ~ ,4- <br />)......, \"\. BOYD . '1.:.'- C;~ <br />\', ""-.-; ~~N fI/v .nI}LM(E '.---- '''-..J\ ",I , ( <br />,'. ~~...~ "'U . ...~ t <br />...~. '-. ~LO NL,GREE_EY".-"", RIVERSIDE <br /> <br />ESTES '\.".... L~r~ EI! . " ,,' .~ <br />lLi.~~ ..~fi'V. ,j HARDiN '''-,.. <br />-- \ . -.'-- ,,'" ps... c.~~_ MiLTON (},: EMPIRE 0( <br />~~,:,~/}!!j!."c~ji?(" t.[ \f. PES. \) ~/ liES, <br />/ ~.5.A(i) FINl,O. ~i ~,: '.'t: "Q( <br />I'~~:'[IJ ",~~~ " ANYON\: i{ <br />~,p.4,.~,q.p } (ll A) (:~" -' <br />-, 60 "', :.' ~BOULDER ,r-- i5 \ PROSPECT <br />'~~~ ~.. .........: /' III In-' RES: _ / <br />