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<br />. <br /> <br />2 :i 4 .J <br /> <br />(Bonefit-cost annlysis, Initinl Deve10pnont) <br /> <br />iJ.dequnto spo.ca for sedir.lent woulc. be providod in 0.11 projoot roser- <br />voirs. As StrOC.l:1S in the '{ostorn Slopo c!iversion <,-roo. o.ro rolntively <br />eloo.r, doposition of soc!il~nt in resorvoirs of thct a.ren woulc. be nogli- <br />gible. On tho Eo.storn Slope howover, hec.vy eontributions of sec.ioont <br />would be mG.e in tho potontio.l Pueblo Resorvoir by tho l.rko.nsc.s Rivor <br />syston. Tho Puoblo Rosorvoir would control sodinent crigil1D.ting nbove <br />the c!o.nsito, Tho 65,600 nero-foot cc.pncity in the reservoir o.lloco.tod <br />to sec'.ment wa.s coaputod on 0. 100-yeo.r re.sis. &odi::Jcntntion in oxisting <br />rosorvoirs, co.ools, Intornls, the I~ko.nso.s Rivor chc.nnol, nne! on irrig,,~d <br />land would be ~torinl1y roc!ucod3 <br /> <br />. <br /> <br />Sodincntntion bonofits would rosult froD tho oonstruction of tho <br />Puoblo Rosorvoir. Tho valuo of irrigation storago in tho valley which, <br />undor oxisting conc:itions, would 1:ocor1O rapidly fillod with sodinont is <br />ostirn,toc! o.t .;~159 per ncre-foot. The Corps of Engineors has ostinated <br />tho bonofits froD withholc'.ing sodiDont trOD tho John Ml.rtin Rosorvoir <br />flood pool nt ~43 por ncre-foot. Tho eost of clonnil1g sedioont fro~ <br />irrigo.tion ennnls o.ne! Intorn1s nnounts to ~~100 por nero-foot nnd ~.800, <br />rospoctively. Benefits, eonputoG. on the basis of reducing theso costs, <br />woulc. nnount to ~135,000 c.nnunlly ns shewn in the following table. De- <br />to.iloc. cort'utntion of benofi ts is shown in l.pponclix H, "Soc.ment nnd <br />Dobris Control n. <br /> <br />Tnblo 1.--i..r41uo.l sccli:.lOntntion bonofits <br /> <br />Bonefits to <br /> <br />I <br />i Bonofits <br />'I por <br />.ncro-foot <br /> <br />Ini tkl <br />(Puoblo <br />I.nnuo.l <br />sod1:1Ont <br />nero-foot <br /> <br /> <br />ovolopacn <br />Rosorvoir) <br />ilvorO:go- <br />annuo.l <br />bonofi t <br /> <br />24,000 <br />4.800 <br />57,320 <br /> <br />Lo.tornls II <br />Cnno.l s I <br />Privuto roservoirs I <br />John Mn=tin Rosorvoirs I <br />ConscJ!'v:;. tion pool , <br />Flood pool .1 <br />___._. _._______.J.L <br /> <br />i.\ 800 <br />160 <br />159 <br /> <br />30 <br />30 <br />132 <br /> <br />::I <br />100 Y, <br />L 50 Y <br />----,.__.f-:" <br /> <br />~ <br />(Roundod nt <br /> <br />43.430 <br />5.870 <br /> <br />159 <br />43 <br /> <br />l.vero.f'.~. "n!1UD.l bonofi ts <br /> <br />135,420 <br />:,)135.000) <br /> <br />",' ;-!'Oc.uot of bonefit par o.err.-foot x o.nnun1 sodi- <br />nent :x' :"\! ,"eors nnortizod nt 2-1/2 poreent fer 100 yonrs. <br /> <br />. <br /> <br />10 <br /> <br />l <br />