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<br />INTRODUCTION <br /> <br />Possible future improvemonts to control floods are not a <br />conslder~tlon of t~ls roport. Flood ~azard In/ormation 15 prov Idod <br />for tho guid~nco Of loc~1 offlcl~ls In ~Iannl~ tho use ~nd regulation <br />of tile f I cod pia in and as ~ubl lc InforrMtlon. Awareness ~nd use of <br />tllese data will help avoId the dangers and damages from future floods. <br />Technical assistance to Foderal, State, and local aRencles <br />for Interpretation and use at t~o Information contained In this report <br />will, upon request, be provided by t~o Omah~ DistrIct, Corps of <br />Engineers. Zoning or other regulation of flood plain use Is a local <br />responslbillty,buttheCorpsotEngineerswlllprovideguidelInesH <br />requested. A pamphlet, "Guidelines for Reducing Flood Dllmagos," and <br />a booklet "Introduction to Flood Proofing" can be supplied. Other <br />publiclltlonsand serv!cesar-eavalldblo depending On supply and f unds. <br />T~e lnforrMtion given In this r-aport does not Imply any <br />Federa I interost or authority to zone or r-egu late use of t~e f I rod <br />plains. The flood profiles and floodod aroa data presented are based <br />On e~ Istlng conditions of the dra Inage basIn, stro~m ~nd va Iley at the <br />time the report was prepared, and are reasonable, rather than precise, <br />indications of prob~ble occurrences. UrbanIzation of the dr-alnage <br />basin may incrOilser-unoff and flooding. The use to whiCh flood plain <br />Infor"m/ltionwlll be put is the responsibility of local authorities. <br /> <br />This report doflnes the flood characteristics of flvc <br />streams In Jefferson County, Colorado. Rdl~ton, LoyJe", and Van <br />Bibbor Cn!Ok5~ trlbutarios of Clear Creek, join In Arvilda whiCh Is <br />lQC:ated In nortm/estern metropolitan Donver. lena Gulc~, a tribu- <br />taryofClearCroek,cutsdiagonilllyacrossthepathofthewestward <br />urban expansIon of the metropolitan area. SandersonGulch,atrlbu- <br />taryof the South Platte River, drains a s"'llll urbanaroa rneastorn <br />JefferSon County and the southwest COrner of Denver. This is the <br />fifth volume of a series ot reports covering streams in the Denver <br />rogionandwas;>repared InresponsotoanappllcaTlonoftheDenver <br />Regional Council of Governments through theColorado$tateWat Or <br />ConsorvationLJoard. Allstofthestreamscovored in previous <br />roportsispresontod In table I. <br />The bilsinand stream characteristics, flooJJ..!hlstories <br />and probablO effects of major flooding are described in this report. <br />Twapotential floods, Intermediate Regional and Standard Project, are <br />uswJ to represent two degrees of major flooding th<lt ",'Iy occur In the <br />future. These two floods are fully def I nee intheGlossary-pages <br />3~ thru 36 - and should be 9 iven dnprnpri.lto consideration In <br />planning torsatetyof develop",ents In the flood nlain. <br />The flOOd hazard aroas deflnod by the two ~tcntial <br />floocsare shown on the plates followlrlg the textot thiSr<,pnrt. <br />;: IcO<J(~j Me" mc>pS ,;how tile apnroxl"ate areas th~t would [)e Illunudted. <br />Flood prof i 105 J..! show tne depths of wilter relative to the stre~mbed <br />and Ilarlk,; ~nd fl:>od clovatlon~ ~CrO~~ tl'e width of the vollny. Toe <br />cro~s ~""ji<.ln~ inJlcate groullJ I,,,el <lcr055 the v~ll"y "n~ tll" <br />overiyingflooJuepfhs. <br /> <br />Tabla I <br />PUBLISHED FLOOD PLAIN INFORMATION REPORTS <br />DENVER METROPOLITAN REGION STREAMS <br /> <br />Voluma <br /> <br />Stream <br /> <br />03toPublfsnad <br /> <br />" <br /> <br />South Platte River <br />Sand Creek <br />Toll GataCrllek <br />Lower Cherry Creak <br />Gear Creek <br />Clear Creek <br /> <br />OctOber 1963 <br />AprIl 196.. <br /> <br />'I <br />See GIOSSilry of T"rm~ <br /> <br />'" <br /> <br />J<lnUary 1966 <br /> <br />" <br /> <br />I <br />