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<br />XXII <br /> <br />LETTER OF TRANSMITTAL <br /> <br />nuting in Colorado. It. slHwlJ he noted also t,hat., based uil the <br />historic amollnt of sediment, passing the Clliflo Dum site, the agencies <br />Illt\'e nllOealed less Ihna 4 percent of the capacity of the Chiflo Reser- <br />voir to scdillll'lltlltion conlrol. Pructicully the only b(:nefit, t.herefore, <br />that Clln be- claimed for the Chitia Dnl1l and Rt~scn'oir is the rcuuctil)1l <br />of dnIllag('S due to iJllllldfiLioll lllld seollr. The- totul dHmnges est.imated <br />from t,llOSt' sources is $4-1] ,2110. Fifty-six t.housand. sevell hundred <br />and t.went.y dollars (If this estimated damage is for inundntion !Llld <br />seoul' below Elephant Butte Rt~servoir. It is subsequently shown <br />herein thnt t-Iie OPCI'flt,jOJl of the .'3HIl Luis Vll}JCY projpet o\'('r {,he <br />;jS-Yt'ar period of l'c(,oJ'd(~d stream flow will eliminate nil but. three <br />spills from Elephullt But.Le !Lud Cnbllllo RcserToil's. Slid! spills ('llll <br />lJl' regulaLed to channel capacity hdow Cn1.ml1o Rescn"oir by t.be <br />prolWl' operat.ion of t.he ElepllllJ1t BuLte lln.! Cnbitllo Resl:'n.oir~. It is <br />coneludcd nn eredit. el1ll be taken for uny benefit frulll the proposed <br />J)J'\)jcet to the fi.I'NL helow El(~philnt, Butte ReSeI'yoir. The totul <br />damages rstimntcd frolll inundation nnd seoul' nbove Elcphnnl. Butt.e <br />Rcs(~n'oir is $:384-,540 per rulTllilll. which appears to be nIl of the ('n~dit <br />whidl CUll be tnkcn for t.he projeet for the prevention of inundation <br />und scour on the basis of the e:Himutr-s Illnde by t.he Corps of EnginC'crs, <br />Tlw estimut.ed nnnuo.l cost. of Chino Dlllll nnJ Rcscl'yoir is $1,2112,- <br />300. Oyer 40 percent of the spring floods originate: in t.hl' CJHlllln <br />Rin'lT Bllsin. V\Tit,h those floodg controlh~(l hv a l'I'seJ'voil' on l.he <br />Chnmn, and wit.h the prott~ction nffonled hv ext(:jldilw :llld rt'_hnhilitl1t.- <br />ing- t.ite le\.N~ syst.mI;. Llw residual damnges' from inUl~lntion and ~COllr <br />would he slIbstnlltilllly less t,haIl the $3-18,5--10. It is very nppul'l'nl <br />t.hat. the Chino Dnm und Heservoir cannot be t'onomienlly just.ifled to <br />}Jl'l~YenL slH:h rl~sidunl dllmnges. <br />T:1ule No.1 II! tUl'-lied "\~I:(lto indi~at,(~s t.lwt with fiO,l,OOO llCl'e-fl'{'lt <br />of ftood-control storng(~ on the Chnmn unu ahouL 100,000 nere-fcl~t <br />of st,orage Ileal' t.he Colorado-New jVJexico Stnt(\ line, all flows at <br />Otowi from lSgO to 1947 could be cOHLroll(~d loa G,OOO cuhit: fcet. per <br />second to t.he. extent that the now could be limit,ed to that nmollnt by <br />rescrvoirs locut,cd n.t, the nbove sites. Tnhle No.2 indicntes tlHlt t~J <br />control t.he flow to 5,000 cuhie frd Jwr second nt, Snll"i\:lnl'cilll, illsofnr ns <br />it, could be controlll~d to thnt rate by reservoirs IOClltcd fit t.he Chnmit.fi <br />site nno neilI' t,he Colomdo-New ':i\'Il'xiL'o St.Hte. line, would I'equire <br />about. 030,OOn u.crC-fl'l.t fit the ChiUllit.n site and about 230,OOn nl're- <br />fC'et nenr the Colol'udo-Nc\v l\Jcxieo St.ute line. If no rontrol is pl'O- <br />vidctl 11('11.1' the Colorado-New ~Iexico Stut,r line, t.here would Iw 19 <br />yellrs dUl'ing snch fL IWI'iod as 1800 through 1047 when the flow of t11(-' <br />river fit Otowi would exceed 5,000 cuhic feet pCI' second be(~aUSl~ of th~ <br />lack of such control. During four of the Yl'IlI'S the flow would cXL'eed <br />7,.500 cubic feet per sc-('ond, and durin!,! two of t.hl.' VI~lll'S the flow <br />would eXl'ced 10,UOO cuLic fpet per se('on~t with 0 lIlllxilllum of 20,000 <br />cubic feet per second. All of the rt'sidunl mL('s of flow 111'C well helow <br />the capacity of t.he ftoodwnys provided by t,he levee system. Tlll~ <br />result.s of t.he higher rntC's of flow~ which wouId ocelli. during the limited <br />nlllllLI!~r of yenrs due to t.hc luck of cont.rol at. t.lw Stnt,e line. would <br />result, in incrcnspd m:1intennnec of the leyce svstcm. This increased <br />maintenance would become less as the chanue(degradt'd find incn~nsed <br />in L'ltpacitv to accommodate mueh of the increllse in How. It is \'(~rY <br />doubtful \~'hethcr tile uverage annunl cost of sueh increased maint.e- <br />n:1Ill'e would equal the annual cost of n. reservoir near the Colorado- <br />