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<br />n.- j <br /> <br /> <br />, ' <br /> <br />"-.',." <br /> <br />'1. '. <br /> <br />; .~.. <br /> <br />the w~ttrrshild;; The upper .'one-third of the area consists. of rocky <br />rolling hills, with medium to sparse vege~atio~.and,sma~l'~loping <br />meadow areas nea)::', j:,hf) d:jYi,des.. The rema1nd~r'~ofthe.:a,raina(le ..are.a, <br />i'COfls:l.stsof 'a.a~ep 'cany.prl, the north. side . d~Wltiehiiiyerlfst.eep:and <br />"tMky!.witK.m~')andstone .elUfs. There are a: :h;wsnort~steep.',jj <br />,rocky'arroYO$.':'Th~: ,i;oU:t~sicie ofithe canron 1s,less 'pre C1,i>i:l; on.!s ,put.. <br />is .rocky; 11iedium..t'o sp.arsely..V'egeta'ted,a:ndthe, distahce tQ. :tpe >ti:vide <br />isdilrther 'than 'on .th\'l.xicirth . ('ida.One la!' ge. in'rojroa:pout ).. 8 mi~s : <br />10ngetiters the. CaIJyqi1, just. above the dam site <Sever?+ ... smaJ,l l;lteep <br />arroyos' enter the ,canyonfr9m tne;south side...TMpr:edQminantge9-: ) <br />lo.gi'c 'fiWmat:ionS.llrE'lQf tt(e ..lJpP\'lr Cretace6uspefioq )li)d Cqns,ist:of the <br />:Vermejo':foi'mation.in. thehig)1er.portions Of the. areaancttB,e Tx:ill:\.dad <br />'.:siiridstofie 'in. the. 'inid~e. and ],owerPorti.oi1. ...Pierresbale:is exposed.'in <br />the mSirt canyoiiih..tbereserVQiJ( areaandsli:ghtly" aboye". . .. ., .,.. <br />~~ . . . . <br /> <br />, <br /> <br />III;-:DESIGN FLOODS <br /> <br />j,i);.q~i': stand~i'<iproject .t'loOq~ ,- Afteriitlldying all ma5:6r':stOi'fuS <br />of past,occilrrence.."i'n the geni'lraivicinity of Trinidad, it,.was fQ1).!l<l <br />that the 2,.6 June 1921 storm which eentered near Pueb~o J. ,poJ,oi:ad.ci., .j <br />was the most suita91\'l.for standar,4: projeet flood cons:idEirat:Lo.n: .9:0. the. <br />Pinon Canon.drainage: .basin. This. storm was~he type of stor,jil."that.c: <br />eould welj,1:i'e expect.ed;to oeeur oYer the drai:nage area with the ieast <br />amount ..Q:( niodifieatiori~.::'The,..st():"'Il. eenter near Pueblo, was transposed <br />without rotation 8 .miles east; 75 miles south, and centered over <br />Pinon Canon. This tr~I!~positien..reqlLi.red;aiJ. adjustment of orographie <br /> <br />".'.-- <br /> <br />- <br /> <br />..,.\.. <br /> <br />-3- <br /> <br />Appendix I <br /> <br />, <br />