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&LLYLO7HHFK <br /> 0))+0''4+0)X <br />0%T <br />Civil EEngineering <br />Wateer Resources <br />Transsportation <br />Strucctures <br />Economic Analysis <br />TTECHNICAALMEMORANDUMM <br />TO:JulianGarza,P.E.,CCityofLaPortte <br />MelvinnSpinks,P.E.,,CivilTechEngineering,Incc. <br />CC: <br />MM:AshishhWaghray,P.E.,CivilTechEEngineering,Inc. <br />FRO <br />12/13/11 <br />DATE:Decemmber13,20111 <br />RE:HydrologicandHyddraulicStudyforTaylorBayou,HCFCUnnitA10400000 <br />CityoffLaPorteDraainageProjecttNo.19,LaPPorte,Texas <br />Thisttechnicalmeemorandumpresentstheestudyfindiingsforhydrologicandhydraulicannalysis <br />performedforTayylorBayou,HHCFCUnitA1040000,annditstributarryHCFCUnitA1041201..The <br />hydroologicandhydraulicanalyysiswasperfoormedforthee10,50,1000and500yearstormeevents <br />assocaainfalloverttheTaylorBaayouwatershhed.Thesstudyresultsarepresenttedto <br />iatedwithr <br />determinewhetheertherecommmendeddraainageimproovementsaloongHCFCUnnitA1040000as <br />identiifiedintheCCityofLaPorteCityWideeDrainageSStudywouldeliminateoutofbankfloooding <br />alongTaylorBayouu,HCFCUnitAA1040000,iintheShadyRiverSubdivision. <br />StudyyBackgroundd <br />SeverralhomesintheShadyRRiverSubdivissionarelisteddasrepetitivvefloodlossspropertiesiinthe <br />FEMAANationalFlooodInsuranceeProgram(NFFIP).TheShaadyRiverSubdivisionisloccatedintheCCityof <br />LaPoortebordereddontheeasttbyTaylorBaayou,HCFCUUnitA10400000,andonthewestby <br />HCFC <br />UnitAA1041201.TheprojectlocationisshhowninExhibbit1.TheCiityofLaPorttecommissioneda <br />compprehensivedrrainagestudyyentitledCittyofLaPorteeCityWideDrainageStuudy(CWDS)dated <br />Januaary,2009,preeparedbyKlootzAssociatess,Inc.TheCWWDSrecommmendedchannelimprovemments <br />alongTaylorBayoou,HCFCUnnitA10400000,beginninggapproximaately600feeetdownstreaamof <br />McCabeRoadtoittscorporateccitylimits,alengthofapproximately1,,608feet.ThheCWDSidenntified <br />thattthesechanneelimprovemeentswouldelliminateoutofbankflooddingalongTaaylorBayouiinthe <br />ShadyyRiverSubdivvisionduringa100yearsttormevent. <br />Adettailedhydroloogicandhyddraulicanalyssiswasrecommmendedfoorprojectdeevelopmentto:(1) <br />updattethewatersshedhydrologyconsiderinngnewresideentialandcoommercialdevelopmentsiinthe <br />Q:\2011\\310017\Report\Letteer Report_12-13-2011.docx <br />+RRXVWRQ7HOJHH5RDG&\SUHVV7H[[DV‡7HO‡)D[ <br /> <br />FFRPSDQ\#FLYLOWHFKHHQJFRP‡ZZZFLYLOWHFKHQJFRP <br /> <br />