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<br />SYLLABUS <br /> <br />be ahoUl 5,600 feet in length. The plan would reduce the EAD on Dry Creek from <br />$658,700 lO $288,500, or a reduction of 56 percem. The estimated constructio/l cost of <br />the 30-year plan is $3,498.500, The plan would have annual net benefits of $64.600, <br />annual COSIS of $305,600, and a benefit-cost ratio of 1.2. <br /> <br />The purpose of Ihis reconnai!iSam;e Mlldy is 10 e..(<luule jluod prob/ellls along <br />8oxelder, Spring, and Dry Creeks in the Fort ColliflJ, Colorado, area. Several previous <br />srudies ofthejlood prohlems on Boulder, Spring, and Dry Creeks ha,'e been complfled <br />which had IIn e./Ject on rhe scope of Ihis study, <br /> <br />Although Ihe ch(<nnel diversion having rhe recommendPd JG-year level ofprO/ectioll <br />does provide considerable benefits' 10 rhe Dry Creek area, It does nor fulfill the City's <br />de.lired goal of removing thejlood hazard andjloodplain restrictions along Dry Creek. <br />The channel diversion having a lOG-year level a/protection could be implemented; how- <br />ever, as the study now stands, Ihe sponsor would be required to pay all WSIS above Ihe <br />cost of the National Economic Developmel1l plan (currently, lhe plan having a 3o-year <br />(eve/a/protection). <br /> <br />Studies conducled on Boxelder Creek In Ihe early 1980's by the City of Fort Collins <br />indicated thai structural measures would be in/easible, A review of thme studies and the <br />limited changes in jlood piain developmelll .Iince thllt tillle indicate Ihat fu.rther $/Iulies <br />of the jlrwd prohlems on Boxe!der Creek are not warranted, <br /> <br />Srudie!! conducted on Spring Creek in/988 by the City of Fort Collins indicate Ihat <br />flood cOlllra! mea.rure;' would be fea.>iblc in .wllle rmehes tif Spring Creek. The CilY <br />complefl'd com'lrllCtion of jlaod C<lIItroi measures on Spring Crfek bnwcell Collegr <br />Awnue I/III/Ilie BurlinJi/On Norrhem Rllilromf ill 1990, wufjurtherjlooJ cOlttrol ;l1;fllO'."'- <br />mellls ar/! planlled for completion within 2 to 3 years. Flood cOlllrol mea.\IIres Oll <br />rcmalning portion!! of Spring Creek do IlOt appear 10 be tcOllOmically feasible, <br /> <br />The new hydrology prepared for Ihis reconnaissance uudy is a concern of the City <br />of Fort Collins and Larimer County because il increase;' Ihe projea co,,'ts comiderubly. <br />The Corps of Engineers met with the City of Port Collim', Larimer County, alld Ihe <br />Colorado Water Conservation Board on 6 May 1993 to discuss Ihesl' COllcer/IS and III <br />provide supporting infonna/ion COllcerning Ihedijferences. t1dditional hydrology ~/Udie;' <br />can be pursued during the cOSI-slwred fea.libiliry sludy 10 further explore sensilive <br />hydro!ogy parameters ar.d alll'rnalivcs [hat may resull In more cost effective projects or <br />that !/lay illUe(LI'e till' h'ld ojprmectirm of the NED planfor Dry Creek, <br /> <br />Average annual damages on DI)' Creek are o/imared to be $658, 700. It would 1>(' <br />I'collomieallyfl'mible ro COlL\'lruClfiood COil/fill m,'llsures 011 Dry Cr('l'k in the /lorlhwl'st <br />portion of Fort Collins. t1 chunnd dh'a,itm 1uwi/l!i a 3().year lel'e! of protcction II'(IS <br />selCe/ed (/sth.' reconnl/issance-le.'dplan. A clll/IIneldil'ersion hal'inga 100-yearle,'c/ <br />(!{protcction would ,~otbefcasible. <br /> <br />A "eremlillarion of II/wi in/ernt In IIII' /i'asibility phl/;'" i,l' still being PII/',\IICd by <br />the City of Fort Collins. Corps interest docs l'.xi,11 in more detallcd cost shared studies, <br />Icadin" wwards a po,lsibIe flood damage reductioll plan. <br /> <br />7711' selected plan wOHld di\'crt Dn Creekjlow,'fmm ublllu 500ji'e/ uf>,([Ieamji'cJlII <br />l.arimt'r al/d Wl'id C<.iIlalto tllf Cache l.a Poudrc Riva, TIliJ dWllIul dil'ersitm would <br />