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<br />Odnl>"T 1981 <br /> <br />PURPOSE <br /> <br />SPECIAL STUDY <br />CACHE LA POUDRE RIVER BASIN <br />LARIMER-WELD COUNTIES <br />COLORADO <br /> <br />The purpose of this study ~as to analyze floOd-related proble~e <br />and pr"vlde Infor....Uon that "ill enable local govermD.ente to <nake <br />decisions thst ,,111 D.l1nlmhe or reduce flood hazard,. 10 the future. <br /> <br />SCOPE OF THE SPECIAL STUOY <br /> <br />VOLUME III <br />FLOOD PLAIN ANALYSIS <br />SHEEP DRAW <br /> <br />The course of the atudy "a8 primarily deter$ined through coordi.na- <br />tion ,,1th the Omaha Di.trlct, Colorado Water Conservation ~oard <br />. <br />LarImer County, Weld County, the city of Fort CollIns, the city of <br />Greeley, and the Latimer-Wold Reg10ndl Counetl of Governmen~a. <br />Numerous other agenc1es and private Interests ~e also contacted <br />during the study. <br /> <br />Introdl1 ction <br /> <br />As the study progressed, tasks were deleted or added in consulta- <br />tion "lth local intereats to respond to changes 18 tdentified needs or <br />priorities. Slnce ao"'~ ..ork Items "ere independent of other stuety <br />tasks, the study results are presented in four separate volumes, VoI- <br />".... I cOMidero basio flood ha"ards. dameafety. and floodwarnlng. <br />Volu~ II presenta the detailed hydrolORfc anaiysia for the baain. <br />Vol~c3 III ~"c IV present flood plaio studIe. [0< Sh~~~ Draw und <br />Fossil Creek, respectively, vhich are t"o trIbutaries of the Cache Is <br />Foudre R1>'er lying ia the path of current urhaoizat1on. All geographic <br />10catioO$ referred to a~" 1n the ~tate of Colorado unleas otherwise <br />indicated. <br /> <br />BACKGROUNO <br /> <br />ThOi' Cache 13. poudre Rtver ;)....In 10 Color"do 13 In a rapidly <br />g~o~lng ~rca. The population ot Lari~r and Weld Counties increascd by <br />about 60 perc"nt betwccn 1970 ,."" 1'\130, Th.. ",,~:n cont...10d .. numb"" of <br />flood hazard areas, fro~ oarrov canyon flood plaIns io the m<luntainous <br />west to wide valley floodplains !ntheeast. l.ocaI interests are <br />concerncd about the changing nature of the flood hazards In ~he basin <br />as a consequence of ur~n grovth, par~lcularly aince the catastrophic <br />Hg Thompaon River flood in the aum"",r of 1976. Discussions re_&ardtng <br />awidcrangln&stndyofthebasinwer.,inltilltedhet"eentheO<naha <br />018trict, Corps of EngIneers snd local planners and elected officials <br />in 1977 and a plan of study was agreed upon. <br /> <br />PURPOSE AND SCOP!: OF VOLUME !I! <br /> <br />AUTHORITY <br /> <br />Qne purpose of th.. Csche la Foudr.. River lIasln Special Study Ie to <br />pr~~ent data on existing and future flood potentIal for strea~s subject <br />to the effects of in~reaslng ufMntz..t10n. T..o "trelt~a In the Cache Is <br /> <br />Tbh study'''''" "",de Llnd,'r .:aotlnu1ng auchor1ty 1n Section 206 of <br />tbe l~&0 Flood Control Act, itS a~codcd. <br /> <br />l <br />