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<br />,
<br />
<br />INTRODUCTION
<br />
<br />PREFACE
<br />
<br />This report pre~ent~ the re,~lt' of a floodpl~in .(udy along the
<br />Roario, For!<River bet'o'Jcen A.pen and Basalt in Pitkin counly, Colorado.
<br />The report w~~ prep~red by IIright-HcLaughl in Engineer, of Denver, Co1cHaJo
<br />..t the request of the Board of Pitkin CounlyCOrmlissioners incooperacion
<br />wi th ,h<, Colorario Water Con,ervat ion tlo~rd.
<br />Copiesofthi5 rcportarcilvailableforpubllcdistribution, fora
<br />nominal fee, at the off; les 1 i sted below. A techn ;",1 ~ddendum deta; 1 i ng
<br />the hydrologl c ~nd hydr~ul i c ,tudies to thi s report i $ ~ Iso ava i lable for
<br />revie',; at the $nrne off; C"S. The addendum incl udes all pert inent d~ta <lnd
<br />cqlcul~tion' used in the Roaring Fork Flood Plain Analysis (Reference 13).
<br />
<br />A~ln()ri2<Jtion
<br />Thi~ r~port wo, ~utnoril~d uy the ColoradO ~ater Con>ervation doard
<br />in joint ,pon,orShip with Pitkin County, ColoradO.
<br />The Boord', power and duty is...
<br />..,"todevi,e,1nd formulotemethod5, rneOn5 and pions fQr
<br />brlnqingaboutthegreaterutilizationofthewatersof
<br />the state and prevention of flood damages therefrom and
<br />todesignateandapprnvestormorflo"dwayrunoffchannels
<br />or basins. and tomake.uchdesignations available to
<br />legislative bodies of cities and incorporated towns; to
<br />county planning commi,.ions; and to boards of adjustment
<br />ofcitie,; incorporated towns; and counties of this.tate"...
<br />a,Slated in Section 37-60-106 (i) (c) of the Colorado Revi,ed Statutes
<br />
<br />Pitkin County Planning Ueportment
<br />120 South Galena Street
<br />r,spen,ColoradoSI611
<br />
<br />1373.
<br />
<br />Colorado',Jdter Con,ervation Boord
<br />
<br />The ci ties, incorp()rot~d towns, and counties wi th; n the .tudy area
<br />5hall provideloningregolation5...
<br />.. ."to e'tabl ish, regulate, restrict, and I iml t ,uen use' o~
<br /><H along any storm or flood'watcr runoff channel or basin, as
<br />'ueh st"rm or flood."ater runoff ".,,,nnel or bihin 1'1", b~en
<br />de,ign~ted and approved by the Colorado ~atcr con.ervdtion
<br />Boord. in order ILl le.s"n or ~void the h"z~rd" to penon, ~nd
<br />d~rnage to prop'_,rty resul t i ng frorr the accumulat ion of storm
<br />orfloodw,uer<".
<br /><IS Hdtcd in Section 30-21l-111 for county governments dnd Section 31-2l-201
<br />far mun lei p~ I govern""'nt" of the Co lorado Revi ,ed St..tute~ 1973.
<br />Upon review ~"d ~pproval of thi S report, the Colorado '..later Conse rv,,-
<br />t io~ Board wi 11 de~ i gnate dnd approv~ "5 f I <x)dpl a i n <1 re<1' tr.ose area, i n-
<br />(I) ,
<br />unddt"d by tll" IQO-y"ar flood ~. d",er I bed by the f loodwilter 5urfoce
<br />elevdt ion3 dnd prof i les in thi S report. The u'~ "f the de, i gnar.ed flood-
<br />pi ain areas may then be regul~ted by the Iccill 9,)Vcrnment.
<br />
<br />IJI,Sherrr.an, Room 823
<br />Denver,Color"do 80203
<br />
<br />I. The term. "Intermedi dte R"gion~1 Flood," "IOO-year flood." and "one
<br />perccnt flood" can be used intercha"g~<1bly d' th"y MC all d~fi oed
<br />bv the '''''''' tyue of flood cve,,! he" GI"5s~ryj. However, f", brevity
<br />"nd elM i ty, the term "IOO-ye~r flood" "III be us~d exd"s i v~1 y
<br />t~ro09hQlJt th i, re,,'''t.
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