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<br />3749 <br /> <br />APPENDIX A <br /> <br />CORPS at' EKGINEEItS LEITER REPORT <br /> <br />il.J:' <br />"', <br /> <br />Refer to File No. SPLGP-F. <br /> <br />Mr. n..J. 'V.\LTf'l<, .rr., <br />Dirfy:tor, Regio'//. 7, U.S. Bul'ca.'u of Reclamation, <br />Den,veT Federal Ccnter, De-nl'o', 0010. <br />DE.\H ~IR. 'Yc\LTER: HeferellcB is maue to yonI' letters of :Mny 15 <br />and .June lD, 1~)5D, relnt.ing to the Bureuu of Heelnmnt.inn's prop used <br />HUt'-cli Dam :illd Reservoir UIl the Fryin;.q)<lll River a.nd especially to <br />your request for a brief Jetter report from the Los Angeles District <br />by abollt. August. 10, covel.jng fluod-control aspects ilnd benefits of <br />thnt project. <br />UpOll previous consideration (in lor)o) of t.he Rlledi Dam and <br />R.esenoir, OU1" agencies COlH::Ul'l'cd in the opinion that pennanent.ly <br />assig'/lecl flood control storag-e nt the site could not be eeollomically <br />justUied. Ho\\'cver, snowmelt floods are the principal source of flood <br />damage in that re.,gioIl lInlI flood control] IY the eonsel'vation-sturage <br />cYtu,:uiltion based OIL forecast. of snowmelt runoff will appreciably re- <br />duce the flood menace. Limitation of funds, of persoIlnel, and of t.imB <br />sut1ieiellt for a thOI'OlWh jn\.e~tigntioll and rp.port will not permit a <br />l~etl.nite determination. ~f flood control uenefits but rough tlpproxim:l. <br />tlOns ha ve been made, <br />The FryiJlgpaIl Hivel', a stream ahout :-Hi miles long, is n. t.ributary <br />of the Roaring Fork Riy€',r, which joins the. Colora,do River at GleIl- <br />wood Springs, Cola, The Frying-pan River drainage area, whieh <br />comprises about 272 square miles, rangeR in elevntion from about <br />(j,f.on feet to about 13.';)00 feet abuve sea leve1. The Roaring Fork <br />River draina!!e area, wllich comprises about 1,4tiO square miles, ranO'cs <br />in eJnvation from about 5,700 feet to about 13,500 feet. About 8:30 <br />square miles of this latter drainage area. ,He upstream from Basalt, <br />which is the point of confluence of t.he .Fryingpall HiveI' and t.he <br />ROil.ring Fork River at. I'i\"el' mile 25.7. The slopes of these. two <br />streams. from the RLledi ,ite to Basalt ancl from Basnlt to Glellwood <br />Springs are about 68 feet, per mile and 34 feet per mile, respectively. <br />r;t.'he Frying-pan River bel~w the-llamsite is generally deeply ent.renched <br />]Jl a eanyon, out t.lle ~oarlIlg For~ Ri~'er meand~l's i.'1 a I~arrow valley <br />whos{~ fiooI' l'tlnges from olle-half mIle to 1 1'l1l1e In wldth he-t'\\'cen <br />Basalt nIl.tl Carbonda.le (river mile ]4:), amI is generally tleeply en- <br />t.renched III a nalT9Iw valley from Carbondale to Ghmwuod Spl'inrrs. <br />The Colorado Ri"$U' between Glenwood Springs antI the head ~f <br />Grand Valley lies iil:1 neLl'row vallcy or canyon sections. <br /> <br />U.S. ARl\[Y ENGlXEER DISTHICT. Los ANGEU:S, <br />COHrs OF E::-JGINEERS, <br />Los Angeles, ('alif, July 21, 1969. <br /> <br />52351-f>O-~ <br /> <br />:i7 <br /> <br />