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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 $nrne off; C"$, 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<Jlion
<br />Thi~ r~port wo, ~"tnoriz~d uy the ColoradO ~ater Con>crvation doard
<br />in joint ,pon,orShip with Pitkin County, ColoradO,
<br />The Boord', power and duty is..,
<br />'" "to devi,e ,'nd formul~te method5. means and pi anS for
<br />brlnqingaboutthegrealerutilizationofthewatersof
<br />the stale and prevention of flood damages therefrom and
<br />todesignatcandapprLlve5tormorflo"dwayrunoffchannels
<br />or basins, and to make suendesignatinns available to
<br />legislative bodies of cities and incorporated towns; to
<br />county planning tommis.ions; and to boards of adju5tmcnt
<br />ofeitie,; incorporated towns; and counties of this.tate"".
<br />as stated inSect i On 37-60~ I 06 (i) (c) of the Co 10 rado Rev i sed Stat utes
<br />
<br />Pitkin County Planning Ueportment
<br />120 South Galena Street
<br />r,spcll.Colorado81611
<br />
<br />1373.
<br />
<br />Colorado',Jdter Con,ervation Boord
<br />
<br />The ci ties, inCOrp()rat~d towns, and counties wi thl n the .tudy area
<br />5hall provideloningregulation5",
<br />..."teestablish,regulate, restrict, and lirnlt such use' on
<br /><H along any storm or flood',Jatcr runoff channel or basin, as
<br />'uch st"r", or flooJ-"ater runoff 'h"nnel or bihin h..s b~en
<br />designated and approved by the Colorado ~atcr (on,~rvation
<br />Boord. in order to lessen or ~void the h"z~rd" to person, ~nd
<br />d~rnage to prop,_,rty resul t i ng frofl" the accumulat ion of storm
<br />oc floodw.Her<".
<br />as Hdtcd in Section 30-21l-111 for county gov~rnmcnt' dnd Section 31-2l-201
<br />for mun lei p~ I govern""'nt" ef the Co lor"do Revi sed St..tute~ 1973.
<br />Upon review ~"d ~pproval of thi S report, the Colorado '''0 tee Con,e rv,,-
<br />t ion Board wi 11 d~~ i gnate and approv~ "5 f I <x)dpl a in" reas those area, i n-
<br />(I) ,
<br />unddt"d by th" lOO-y"ar flood ~. de,or I bed by the f loodwilter 5urface
<br />clevat ion3 dnd prof i Ie, in thi 5 report. The ",e "f th~ de, i gnar.ed fl"od-
<br />pi ain areas may then be regul~ted by the loc,,1 9"vernment.
<br />
<br />IJI,Sherfl".an, Room 823
<br />Denver, ColDr~do 80203
<br />
<br />I. The terms "I n ,ermed i dte Reg i on~ I F\ Clod," "I OO~ye"r f I oed," and "one
<br />percent flood" can be used intercha"g~<1bly ~, th"y Me all d~fi ned
<br />bv the ,~"'" tyu~ of flood eve,,! h"" GI"5s~ryj. H')w~v~r, fc>r brevity
<br />dnd darity, the term "IOO-year flood" "III b~ us~d cxd",iv~ly
<br />t~rOU9hOlJt th i, ''''''lrt,
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