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<br />COI.OR.-\DO.BIG THOMPSON PROJECT
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<br />15
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<br />The dnm site is locateu in tIle E ~ of sec. 15, T. 25., R 80 W., sixth
<br />principnl meridian, near the hend of a box canyon, between Grcellond
<br />Little Green UOllntuins, caused by the river cutting through a. por.
<br />phyry sill. The foundation bedrock consists of sedimentary rocks,
<br />either Dakota sandstone or Morrison sbale8, and the intrusive por.
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<br />phyry.". I .. 0 b' f d d th
<br />The 1l"rlg'atJon out et cllpnelt)' 15 I, 00 cu Ie eet per secon , an e
<br />power outlet c.npucity is 1,500 cubic feet per second. Tho spillway
<br />cup:H:i ly is :!5,()IIO CII bic fcet P('f secOIlll. .
<br />'l'hel'cs('l'vllir willlluod 2,100 ucfCS of land and will huve u. CllpllClty
<br />of 15:!,OUO l\cn:-fect.
<br />From the wlltcr-supply studies it was found, assuming that full
<br />developmcJlt had tukcll plnce ill the Colomdo River llusin uud tlJllt tlae
<br />Big Thompson project had been ill opcrution the last 35 years, tlull in
<br />the year 1!J31, tho lowest YCllr of dependuble run-olf record, the
<br />Colorilllo U:I::iin IISl'rs abon.l O1en\\'oou Spring'S would have becn sllOrteu
<br />37,OUO aCl'e-feet flll' il'/'iga lion lIse nud the Public SCI'\'ico Co. \Vould
<br />!auvc !.Cl'U ~IIlH"lC(l Hi,OOO ul'l'c-fect ul their powct~ }llnnt at Sho~hollO
<br />dUrillg t IIC 11llllilTi~a liun SCIlSUIl, or t\ totul sllOrtuge of 53,000 IIcre-feet.
<br />Accol'Jillgly, 50,000 ncre-fcet of Green MOlin luin storug-l! lun'e becn
<br />nllo(';\ tell to rCIlI:lccmcnt purposcs for which the \\O'lIl(:I' lI:i~rs in north.
<br />castcl'll Culul'lulu will pay $1,5110,000. The J'cmo.illiu~ 1 OO,OUO Ilcl'c-fcet
<br />ul.....c...!.I.l...l.u.......l..:......,.II.....I.:I.Ll.. u....p.O\\. '.I!l'..U. .1..1...1.1. \.\'.1.'.1.1.. ..,uc..........\H.l.....i...(...I. f..u.l'......o. .l.l. ...t. ....o..f...J....I....I.I.......~.....\....c......r...rC..Y.CI..l..I...I..C.:i.
<br />Smcclhcll \'cm~cshurhlgc {ur>uth puwcr.ulllllrngatllJuful" tho
<br />last} Orl:ar~', the .lu.wt'st.1 O,rcllrs ufrUlHJ!l'recunlisJU,OUuncrc-fi.:cL
<br />Tllcn~wouhl he the lli,llOO ucrc-fect(lill'el'l:lIce,uudll...portion..of...tho ".
<br />lOU,Ollll aCl'c-fcct.lctO\1 tiur powcr that I:LlU hlbe usell ljy lheColoruuo
<br />llllsiu lI~CI'S tOSH P plyshul'lllgCS ... tlul Lmiglll,occUl' .... ill. tlleiri.l'l'igu.lioll
<br />use ill YC:lf:i of extreme 1owI'uu-olf . these slllirlll"cS IWL bcill17 CILUSCU
<br />. ,. _ _ ", _'._'" .',.,' " ,,' ,.,' ;_,___ _.- -: ':'. ., I,. _ "":),.,' .' , '_' . :0. '. -."
<br />by' tllllt nll1,.;IIIlIlIU tllilnli vCl':jion. '. .......... .
<br />'l'hcllltlll cstiumlt!llcust of tho (hull nthl I'c:icr\'uir is $3,77U,U:3:~,
<br />$2,~70,0:3~ lIf which will Le J>llid for frum puwcr rC\'l.lJlUc:l.
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<br />GIU.NU\' Ul:.:Sl::Iwom .\:-iD ::;TOIl.\lil::
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<br />The stlll'a;;e of Culon1l1o Rivcr WILICI.S for the project i~ to he mado
<br />in wlllll i:-i li.llllWIl liS nnlllhy H,!s(!I'\'lIir whil'h is !tWilled ill Tps. ~ HUll
<br />3 N., lb. 7ii ILIIlI 7li \r., sixt h prilll:ipal JIlcridiun, iu GI'ILIIlI CUlIllly,
<br />COllll'ilI\O. The rC:icf\'oil' baslIl o!:cllpic:i thc \'lIlle)':; lIf ::itill\\'utcr
<br />Creek, thc south fork 01' Al'Ilpllhu Creck, llllt! tlw IIl\1ill ClIlnrll.Llo l~ivero
<br />Tlw daJllsite is IUl::atl.d IlhouL -1 mill':) 1l1ll'tlwIIst of the town of
<br />Gl'imby, ('lilli" in tIle ~E)~ uf scc, 11, T. :! N., It ,Ii \f., in Gnl.l1u
<br />COUllly, Colo. It is Illl:utcd at LllO hC:Ld lIf II ~hllrtl'lIll)'oll which tho
<br />ri\Oel' has ('III. lhroug-h prc-CllllllJrillll rud.s flll'lllill~ IL SI'III' of the llulin
<br />UOl:ky :\[lIl1nlain lIIass. .At tlac dalllsitc the <:1111\'1111 III rivCI'.boltoru
<br />levd IS :!lHl fl'd widl', while lit cle\'lllian ~,:.!7~ it i:-i 7:.!l\ [(:L:i ill whlth.
<br />TIIll dalll i:s tu In) II (;1I11I1,iullliulI enrth ILIlJ ruddill :itrllcLul'tt with II.
<br />n11\XimUIll lll~ig'ht of ~23 fect. Tho oul lot cllJHu:il'y is 300 {~ubit; feet
<br />pel' second alld the spillw:.L}' CILPllcity i:i 12,000 cubic fc~t per seconu.
<br />Wilh tIll:! lti~h-\nlll'r lilll.: at CICYlltillll 8,~i5 feeL tho reservoir 111l:i u.
<br />cnpllcity uf .1-":!,lSliO Hl're-feeL, 1L1lt! willlluod ILIl un'a uf 0,943 UCI'C::i.
<br />This rcscl'\'oir will Hut only illtcrcept tllC lIo\\' of th~ Colorado at
<br />that point, hut thl.l now uf Willow Creek will 1>0 intercepted near
<br />Dexter, Colo., and brou~hL inLo the rcservuir thruugh IL cnuul of 1,000
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