Laserfiche WebLink
<br />~;rATE OF COLORA,[: <br />~ <br />~ <br /> <br />COLO~ADO WATE~: CONSERVATION BOARD <br />Department of Natural Resources <br />721 5tatl~ Centennial Building <br />1 J 1 3 Shmman Street <br />Denver, ':::olorado 80203 <br />Phone: Cl03) 866-3441 <br /> <br />F"ehrllary 13, 1989 <br /> <br />Roy Romel <br />GOYPrrlor <br />J. Willi(lm Mcl)oj'"ld <br />Dlrf'c(or <br />Odvld \Iv' Walk.pf <br />[)eplJly [),rpc1(H <br /> <br />Mr. Richard Buse <br />Chief Plan Formulation Branch <br />Corps of En<1ineers, Omaha .District. <br />215 North 17th Street <br />Omaha, Nebrilska 68102-4978 <br /> <br />Dear Mr. Bu!;e: <br /> <br />The City of Sterling Colorado is enthusiastic about the <br />apportunitiEis which our Sect.ion :22 l,tud~' project offers to <br />their community. T:l1e City deE:1res to develop flood mitigation <br />measures for the So~th Platt.e River floodplain for a study <br />J:eacb as shclwn on til1e enclosed map" <br /> <br />The Section 22 planning tasks for tbe Sterling, Colorado <br />Riverfront Development Plan will include a number of hydraulic <br />analyses on the South Platte River in tbe vicinity of Sterling, <br />Colorado. W~ recommend that the Corps use the topographic, <br />hydrologic, and hydraulic elIata as present in the Corps of <br />Engineers, Flood Plilin Information Report, dated September, <br />1978, Using the HEC-2 model, whIdl 1~as developed for the flood <br />hazal:d investigaticm, lOre solicit Ule' following planning <br />assistance. <br /> <br />() Floodwav Del.ineation -- UE:illg the P.EMA 1 foot riSE' <br />cri teria, a. floodway will he det.e.rmin,ed for the 6.tudy <br />reac:b. <br /> <br />CI Floodwav and Clearing the Ii~tstiDq Ch;mnel. - Using the <br />natural channel geometry, a IOO-year floodplain limit. <br />and floodway limit will be determined with the existing <br />(Natural) channel cleared of vegetation and sand bars. <br /> <br />o Left Bank Levee System - Using the City'S proposed <br />leVel! alignment, the lOO-year floodplclin elevat ions and <br />inundation areas will be determined for the study <br />reach. ShOUld it be determined that the City'S levee <br />alignment causes a .rise in the 100-ye.;lr water surface <br />elevCltion greater than on,e foot, the CWCB reguest that <br />the Corps consider the follol.'J.ng conditions: <br /> <br />9:J65E <br /> <br />A'rTAClIlMENT 1 <br />