Derby City Council / Environment Agency | Environmental Statement Our City Our River
Black & Veatch Non technical summary, Page i
NonTechnicalSummary
Derby City Council / Environment Agency |ES Non‐Technical Summary Our City Our River
Black&Veatch 2
Non‐TechnicalSummaryIntroduction
DerbyCityCouncilisapplyingforplanningpermissiontoconstructnewflooddefencesthroughDerbycitycentre.TheprojectiscalledOurCityOurRiver.AnEnvironmentalImpactAssessment(EIA)hasbeencarriedouttounderstandtheeffectsthatthenewflooddefenceswillhaveontheenvironment.TheresultsoftheEIA,includingdetailsofhowtopreventorminimisenegativeenvironmentaleffects,arereportedinanEnvironmentalStatement.ThisNon‐TechnicalSummarysummarisestheimportantfindingsoftheEIA.
Thelocation
Theprojectislocatedalonga9.5kmlongsectionoftheRiverDerwentthroughDerbycitycentre.ThemainprojectareaextendsfromtheA38inthenorthofthecitytotheA5111inthesouth.TheprojectareaalsoincludesthevillagesofAmbastonandShardlow(Figure1).
Figure1 OurCityOurRiverprojectarea
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Summary
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Derby City Council / Environment Agency |ES Non‐Technical Summary Our City Our River
Black&Veatch 4
Raisingallflooddefencesalongtheirexistinglinewouldforceupriverwaterlevelsbecausedefenceswouldcontainwaterthatwouldotherwisespillintothefloodplain.Thismeanstheheightofflooddefenceswouldbemuchhigherthantheexistingdefences.Forexample,atExeterBridge,defencestoprotectagainstaseverefloodeventwouldneedtobeover2.0metreshigh(fromgroundlevel).ThiswouldgreatlychangewhatDerbycitycentrelookslikeinthefutureandseparatetheriverfromitsfloodplain.
RaisingflooddefencesalongtheirexistinglineinDerbywouldalsoincreasewaterlevelsupstreamasfarastheA38,anddownstreamtowheretheRiverDerwentflowsintotheRiverTrent.Thiswouldincreasefloodrisktopropertiesintheseareas.Itwouldnotbepossibletoraisetheheightofalltheexistingdefencesintheselocationstodealwiththisrisk.
AsaresulttheStrategysetoutaplanforanewlineofflooddefencesthroughDerbythatwillmakemorespaceforfloodwatertomovethroughthecity.ThiswillreducetherequiredheightofdefencesthroughDerbyandminimisethechangeinwaterlevelsinupstreamanddownstreamcommunities.Settingbackflooddefencescanalsocreateabetterriversideenvironmentforpeopleandnature,byopeningupmoregreenspace,restoringthefloodplain,andmakingtheriversidesaferandmoreappealingforresidentsandvisitors.
Thesolution
In2012,DerbyCityCouncilandtheEnvironmentAgencyproducedtheOurCityOurRiverMasterplantosetouthowandwhereflooddefencesshouldbeprovidedtoprotectthecityandimprovethemovementoffloodwaterthroughthecentreofDerby.TheMasterplanalsoidentifiesanumberof‘developmentsites’toaddresstheneedtoredevelopderelictandbrownfieldsitesalongtheriver.Defencesatdevelopmentsiteswillbedeliveredbythirdpartiesaspartoftheredevelopment.ThesedefenceswillconnecttodefencesprovidedbyDerbyCityCouncil,assistedbytheEnvironmentAgency,toprovideacontinuousdefence.
TheMasterplanhasbeendevelopedfurthertocreatetheOurCityOurRiverproject.Theprojecthasbeendividedintoaseriesofdistinctsites,shownonFigure2andFigure3.Improvedfloodprotectionwillbeprovidedbyrealigning,raisingandstrengtheningexistingdefences,andinsomelocationsprovidingnewdefencesaltogether.Thenewdefenceswillbeamixofwallsandembankments,andinsomelocationsnewwatercontrolstructuresandpumpingstationswillbebuilttopreventfloodwaterfrombackingupintothesurfacedrainageandsewagesystems.
TheproposalsaresummarisedinTable1.Inadditiontomeasurestoreducefloodrisk,scourprotectionwillprovidedtothebridgepiers,abutmentsandthechannelbedatStMary’sBridge,DerbyJunctionRailwayBridgeandWilmortonRailwayBridge.Thiswillbepartofongoingmaintenancetoprotecttheseimportantpiecesoftransportinfrastructure.
Thedefenceswillbeconstructedinanumberofstages,broadlysplitintothree‘packages’(refertoFigure2andFigure3).Theprojectisscheduledtobeconstructedbetween2015and2022.Thesequenceofdeliveryofeachstageoftheprojecthasbeendesignedsothatthebenefitsaredeliveredattheearliestopportunityandtoensurethatnoneoftheworksincreasefloodriskinotherpartsofthecity.Someuncertaintysurroundstheplanneddeliveryofthe‘developmentsites’asthesewilldependonplanningconsentbeingreceivedbythethirdpartiesfortheirproposeddevelopments.
Derby City Council / Environment Agency |ES Non‐Technical Summary Our City Our River
Black&Veatch 5
Table1 SummaryoftheOurCityOurRiverproject
Breadsall:New,low,floodwallaroundthe‘BookerWholesale’site.Newdemountabledefencetobeplacedacrossthemidlandsmainlinerailwaywhenneeded.DarleyAbbeyMills:Repairsectionsofexistingflooddefenceandinstallanewwatercontrolstructureonasurfacewaterdraintostopfloodwaterenteringthesewernetwork.DarleyAbbeyMillsBridge:Replaceandraisetheexistingbridgedeck,whichisinpoorcondition,toallowcontinuedaccessacrosstheriver,includingduringfloods.AlfretonRoadIndustrialEstate:Replaceexistingfloodwallswithhigherwallsalongtheexistinglineofdefence.BuildanewfloodgateacrossHaslam’sLane.LittleChester:RaisetheexistingdefencealongeastedgeofDarleyPlayingFieldsbyinstallingafloodwallontopoftheexistingembankment.NewfloodembankmentalongsouthedgeofDarleyPlayingFields.Replaceexistingdefenceswithnew,higher,defencesaroundthecommunitycentreandParker’sPiece.Lowergroundlevelsatthecurrentbowlinggreentohelpfloodconveyance.Providereplacementsportsfacilitiesandcarparking.CityRoadsites:Lowergroundlevelsandprovidenew,setback,defencesatCityRoadcarparkandtheAidaBlissdevelopmentsitetoallowfloodwaterstoflowaroundHandysideBridge.Replaceexistingfloodwallwithanew,higher,set‐backfloodwallatEtruriaGardens.New,set‐backflooddefenceattheLowerCityRoaddevelopmentsite.Replaceexistingfloodwallwithnew,higherfloodwallatBridgeInn.DukeStreet&SowterRoad:Replaceexistingdefencewithnew,higherfloodwallssetbackfromtheriver,includingdemountableflooddefencesacrossDukeStreet.LowergroundlevelsnexttotheriveratthesouthendofDukeStreetandatSowterRoad.ThiswillallowfloodwaterstoflowaroundStMary’sBridgeandCauseyBridgethroughtheSowterRoadunderpass,whichwillbeclosedduringaflood.NorthRiverside&MeadowLane:NewsetbackdefencesthroughNorthRiversidetocreateafloodconveyanceroutearoundExeterBridgeandHolmesBridge;partofregenerationofthearea.Creatingthefloodreliefroutewillrequiresomeexistingbuildingstobedemolished.Newflooddefence,setbackfromtheriver,throughtheMeadowLanedevelopmentsite.FullStreetandExeterBridge:FlooddefencesincorporatedintoredevelopmentoftheformerMagistratesCourtandPoliceStation.FloodgatesacrossDerwentStreettothesouthofExeterBridge.RiversideGardens:RaiseexistingdefencesatRiversideGardensviaasteppedembankment.NewdefencesaspartofthedevelopmentoftheRiverlightsPoolandFitnessCentre.MillFleam:NewpenstocksandpumpingstationattheMillFleamculverttopreventRiverDerwentfloodwatersbackingupMillFleamandcausingsurfacewaterflooding.ChaddesdenSidings:Removetheexistingacousticbarrierandlowergroundlevelstoforma120mwidefloodconveyancecorridor.Newfloodembankmentalongtheedgeofthefloodconveyancecorridor,andanewfloodwallalongthe‘Costco’siteboundary.Plantingandriverfloodplainhabitatcreationalongthefloodconveyancecorridor.ReplacetheexistingDerwentParadeoutfallwithawatercontrolstructureandpumpingstation.ReplacetheexistingChaddesdenBrookoutfallwithwatercontrolstructure.PridePark:Raiselowspotsinexistingdefencesviasectionsoflowfloodwall.ChaddesdenTriangle:Removeexistingfloodembankmentandlowergroundlevelstocreatea45mwidefloodconveyancecorridor.Newflooddefencealongtheedgeofthefloodconveyancecorridor.Raynesway:Raiseexistingdefencesbyraisingtheexistingembankmentonthewestsection,andprovidingafloodwallontopoftheexistingembankmentaroundacricketpitch.AlvastonPark:Provideanewset‐backembankmentaroundthesouthandeastparkboundariestocreatespaceforfloodwaterwhilstprotectingpropertiessouthofAlvastonPark.Ambaston:Raiselowspotsinexistingembankments.Shardlow:Raiselowspotsinexistingembankments.
Derby City Council / Environment Agency |ES Non‐Technical Summary Our City Our River
Black&Veatch 6
Figure2 Locationofproposedflooddefences(upstream)andareasthatwillbenefit
Derby City Council / Environment Agency | ES Non‐Technical Summary Our City Our River
Black&Veatch 7
Figure3 Locationofproposedflooddefences(downstream)andareasthatwillbenefit
Derby City Council / Environment Agency | ES Non‐Technical Summary Our City Our River
Black&Veatch 8
Consultation
Theconcernsofresidentsandlandownersweretakenintoaccountthroughpublicdrop‐insessionsandonetoonemeetings.
AtDarleyAbbeyMills,theoriginalproposalwastoraisetheexistingflooddefences.ConsultationwithresidentsandEnglishHeritageraisedconcernsaboutthenegativeeffectsofraisingdefences,andthemajorityofpeoplethatwenttoapublicdrop‐insessionwereeithernotinfavourofraisingtheexistingdefencesorwereundecided.Inresponsetothis,analternativeapproachwasagreedtoretaintheheightoftheexistingdefences,carryoutlocalisedmaintenanceworkwhereneeded,andreplacethedeckoftheDarleyAbbeyMillsBridgewhichisinpoorcondition.
AtEtruriaGardens,theoriginaldesignwastoprovideanewsectionoffootpathinfrontofthenewfloodwall,withstepsacrossthefloodwallbetweenEtruriaGardensandtheriversidepath.Sometreeswerealsogoingtoberemovedtoimproveriverviews.Consultationwithresidentsatadrop‐insession,andwithDerbyshireConstabulary,raisedconcernsaboutsafetyandsecurityassociatedwithariversidepath.Residentsalsosaidtheywouldprefertoretainriversidetrees.Inresponsetotheseissues,thedesignwaschangedsothataccessalongthisnarrowstripofriverbankwillnowbepreventedandtreeswillnotberemoved.
PeoplewhowenttothedropinsessionforEtruriaGardenswerealsoaskediftheywouldpreferthenewflooddefencetobea2.0mhighbrickcladwall,ora1.5mhighbrickcladwallwith0.5mhighstructuralglasspanelsontop.Themajorityofpeoplepreferredthesecondoption,whichhasbeenincludedinthedesign.
EtruriaGardens:visualisationofproposeddefencesfollowingpublicconsultation
Derby City Council / Environment Agency | ES Non‐Technical Summary Our City Our River
Black&Veatch 9
Theplanningprocess
Mostsectionsoftheprojectinvolvebuildingnewflooddefencesonadifferentalignmenttotheexistingdefences.TheseworksneedplanningpermissionfromDerbyCityCouncil.However,worktoraiseandstrengthenexistingdefenceswillbecarriedoutusingtheEnvironmentAgency’spermitteddevelopmentrightsanddonotneedplanningapproval.
ProjectsthatarejudgedasbeinglikelytocausesignificanteffectsontheenvironmenthavetogothroughanEnvironmentalImpactAssessment(EIA)tosupporttheplanningapplication.DerbyCityCouncilconfirmedthattheOurCityOurRiverprojectislikelytogiverisetosignificanteffectsontheenvironment,andassuchanEIAhasbeencarriedout.
WorkcarriedoutusingpermitteddevelopmentrightscanalsoneedEIAbeforeworkcanstartifitislikelytocausesignificanteffectsontheenvironment.Assuch,theEIAforOurCityOurRiverconsideredallpartsoftheproject,notjustthosethatneedplanningpermission.
ThefindingsoftheEIAarereportedintheEnvironmentalStatement,whichsupportstheplanningapplicationfortheprojectandalsomeetstheEIArequirementsforpermitteddevelopment.
TheEnvironmentalImpactAssessment
TheEIAforOurCityOurRiverassessedtheeffectsoftheprojectonthefollowingaspectsoftheenvironment:
HumanPopulation WaterandFloodRisk
HistoricEnvironment Ecology
LandscapeCharacter Traffic,TransportandAirQuality
VisualAmenity MaterialsandWaste
SoilandLandContamination CumulativeEffects.TheEIAconsideredtheexistingconditionoftheenvironmentandthewaythismaychangeasaresultofconstructionandoperationoftheproject.Whennegativeeffectswereidentified,waysofpreventingorreducingthescaleoftheeffectswereconsidered.Insomecasesitwaspossibletoalterthedesignoftheprojecttoavoidorminimiseeffects,forexamplethedefencesatLittleChesterhavebeendesignedtominimiseeffectsonarchaeology.Inothercasesactionswillneedtobecarriedoutduringconstruction,forexamplemeasurestoprotectknownbatroosts.AlloftheactionsneededtominimisenegativeeffectsontheenvironmenthavebeensetoutinanEnvironmentalActionPlan.Thiswillbefollowedandupdatedastheprojectprogresses.
ThekeyfindingsoftheEIAaresummarisedinthefollowingsections.
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willbesomeential,commewillkeeptdisturbancewmesareaandfacilitieswill
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ojectwillcreRoad,Riverheprojectwesawayfroms,someplaylostatDuke
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tion
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unavoidablmercialandhistoaminwillbeuseddtenniscourlbeprovide
anumberousing.Derbymainwithintduringthe
eatemoreatrsideGardenwillresultinmtherivereyingfieldwiStreet,Park
00propertiescedriskoffl
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floodrisktofencesthrouactivefordev
ledisturbanrecreationaimumandmd.AtLittleChrtswillbereedduringco
fbuildingswyCityCouncithecommunrelocationp
ttractiveandnsandNorthanoverallgedgewillmellbelostatAker’sPiecea
s,includingtooding
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nce(e.g.noisalareasdurimethodstoshester,theeeplacedwitonstruction.
willbedemoilwillprovinitybeforeEprocess.
dsaferpublihRiverside.gaininpublieanthatsomAlvastonPaandBass’sR
thosealong
Summary
ately1,380holeofDerbyhelpingtor
se,vibrationingconstrucscreenresidexistingbowhnewfacilit
olished,incldenewhouExeterHous
icspacesaloAswellasiicopenspacmegreenspaarkandsmalRecreationG
CityRoad,w
homesand7citycentrewregeneratet
n,dustandaction.Goodcdentsfromnwlinggreen,ties.Continu
ludingExetesingtoalloweisdemolis
ongtherivermprovemence.Howeveracewillbelollareasofpuround.
willpermane
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720commewillalsomatherivercor
accessrestriconstructionnoise,dustacricketnetsuedaccesst
erHousewhwexistingreshed.Suppo
ratDukeStntstoexistinr,theneedtoostatEtruriublicopens
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Derby City Council / Environment Agency | ES Non‐Technical Summary Our City Our River
Black&Veatch 11
HistoricEnvironment
Derbyhasarichhistorywithmanyimportantheritageassetsrangingfromthepre‐historicperiodthroughtothetwentiethcentury.ExtensiveRomanremainsexistatLittleChester,comprisingthenationallyimportantremainsofaformerRomanfortanditsassociatedsettlement.ThemorerecentindustrialheritagealongtheRiverDerwentisevidentasformermillsandreflectedinthestatusoftheDerwentValleyMillsWorldHeritageSite.IntotaltherearefourScheduledMonumentsclosetotheworks,sixConservationAreasandnumerouslocallyandnationallyListedBuildings.
Theprojecthasbeendesignedtominimisepermanentchangestothehistoricenvironment.ThenewbridgedeckatDarleyAbbeyMillswillnotchangethesettingoftheformermillbuildingsoraffecttheviewsfromDarleyAbbeyvillage.ThealignmentofflooddefencesatLittleChesterhasbeendesignedtominimisetheextentofRomanremainsdisturbedbytheworks,andalsotoshowthelocationoftheRomanfortwalls.Wherenecessary,treeswillbeplantedtoscreennewflooddefencestopreventsignificantchangestothesettingofhistoricbuildings.
ThenewdefenceswillreducefloodrisktoheritagefeaturesincludingListedBuildings,ConservationAreas,andtheRomanfortScheduledMonument.However,twolocallyListedBuildingswillneedtobedemolishedatNorthRiverside:ComptonHouseandExeterHouse.
ThesettingofseveralListedBuildingswillbetemporarilyaffectedduringconstruction,andconstructionworkcouldalsodamagenationallyimportantburiedremains.Anarchaeologicalmitigationstrategywillbepreparedandmeasurestoavoidorreduceeffectsarelikelytoincludewatchingbriefs,archaeologicalevaluationtrenchingandprogrammesofstripandrecord.InformationboardswillalsobeerectedtotellpeopleaboutDerby’sheritage.
DarleyAbbeyMills,partoftheDerwentValleyMillsWorldHeritageSite
Derby City Council / Environment Agency | ES Non‐Technical Summary Our City Our River
Black&Veatch 12
LandscapeCharacterandVisualAmenity
Increasingtheheightofexistingflooddefences,andbuildingnewdefences,hasthepotentialtopermanentlychangethelandscapecharacterandvisualamenityofDerbycitycentre.Viewsfromresidentialandcommercialpropertiesandtheattractivenessofpublicspacecouldbeaffected.Thefollowingmeasureshavebeenincludedintheprojecttominimisenegativeeffects:
StructuralglasspanelshavebeenincludedaspartoffloodwallstomaintainviewsfrompropertiesatEtruriaGardens,theBridgeInnbeergardenandcarpark,CityRoadatParker’sPiece,andDukeStreet.
Floodwallsinresidentialandpublicareaswillbecladwithbrickorstonesothattheyblendinwiththeexistingbuiltenvironment.
Replacementtreeswillbeplantedtomaintainthedistinctlandscapecharacterandthevisualamenityoftheriverside.
Grassedembankmentswillbebuiltatthebaseofsomefloodwallstoreducetheintrusivenessofthewalls,forexampleatLittleChester.
Greenwallswillbeusedtoreducetheintrusivenessofsomenewwalls,forexampleatDarwinPlaceinNorthRiverside.
ThereremainspotentialforsignificanteffectsonlandscapecharacterandvisualamenityfrombuildinganewfloodembankmentatAlvastonPark,buildingnewdefencesandthepartiallossofanavenueoftreesatDarleyPlayingFieldsinLittleChester,andlossofviewsforresidentsofStoneHousePrebendlookingoverParker’sPiece.Waysofavoidingorreducingthescaleofnegativeeffectswillbeconsideredaspartofthedetaileddesignprocess.
SoilandLandContamination
PastandpresentindustriallandalongtheRiverDerwentmeansthattherearepotentiallycontaminatedsitesthroughouttheprojectarea.Anassessmentoftheriskofhistoriccontaminationwasundertakenandgroundinvestigationswerecarriedout.Thepotentialforcontaminatedlandtobedisturbedduringconstructionworksorduringfloodingwasexamined.
AlayerofclaywillbeputontopoftheloweredgroundalongthefloodconveyancecorridorsatChaddesdenSidingsandChaddesdenTriangle.Thiswillprovideabarrierbetweenriverwaterandanycontaminantsthatmaybeinthegroundattheseformerindustrialsites.
AtDukeStreet,installingconcreteboredpilescoulddisturbcontaminatedlandandcreatearouteforcontaminantstomoveintocleansoilclosetothesurface.FurthercontaminationassessmentwillbecarriedatDukeStreettobetterunderstandtheextentandlocationofcontamination.Thisinformationwillbeusedtospecifythelocationofboredpilestoavoidcontaminationwherepossible,andtoidentifywherecontaminatedsoilmayneedtoberemoved.
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ngexistingdtopitsbanksfenceswillaandChadde
flooddefenduringafloosacombinanPark,Amb
ssmentofwout.ThisidehmovementerpotentialeeswiththeW
gy
ndvegetatioestobebuilthatarefelledrginalhabitadehabitats.Twillbeatem
bitatwillbeodcorridorwillbereinstwillbeplantetionstotheretlandspeci
esoftreesinandascom
MillFleamcuattheMillFgstructuretofthepenstoisnotaffect
epriverbanwhichnestuctionstartsuringconstr
shabitatatCoutbeforecagreedwithuctionworks
nvironment A
odRisk
defenceswisontolandtalsoallownesdenTriang
ncesinDerbyod.ThiscouationofnewbastonandS
whethertheentifiedthattontributareffectsonfloWaterFram
onwillneedt.Newtreesdand,wheratcreationwTherefore,tmporaryeffe
ecreatedatwillbeplantatedandaedwithvegerivertocreaies.
ntheprojectmutingroutulvert.ThenFleamoutfaloavoidaffeockwillensted.
nksatChaddinburrows..Ifbirdsareructionwillb
ChaddesdenconstructionhNaturalEngshavefinish
Agency | ES No
thnewdefethatwillactnewriverwegle.Thesech
ycitycentreldincreaseandraisedSharldowto
projectcomtthenewouriesoftheRiows,waterqeworkDirec
dtobecleareswillbeplaepossible,wwillbecarrihelossofsmect.
Chaddesdenntedwithwenewpondcetationandatehabitats
tareaareustes.Thereisnewpenstoclwillbebuictingtherourethatacc
desdenSidin.Surveysfoenestingintbedevelope
nSidingsthanstarts.Ifregland.Theshed,whichw
on‐Technical
encesthatartasfloodplaetlandhabithangeswill
eincreaseswfloodrisktodefencesatoensurethat
mplieswithtutfallsandpiverDerwenqualityandctive.
edtoallowfntedtoreplwildflowersiedouttoimmallareaso
nSidingswhetlandspecicreated.Thewillhaveforfishand
sedbybatsfsaknownbackandpumpiltoutsideofost.Thedetcesstothero
ngsprovideornestingbithebanksthed.Alternati
atissuitableeptilesarefositewillberwillcontinue
Summary
resetbackfain,butwithattodeveloimprovethe
waterlevelsosomecommBreadsall,Ptfloodriski
theWaterFrpumpingstant.Thedetariverecolog
floodlaceseedingmprovef
heretheies.Twopond
dother
foratroostpingfthetailedoost
potentialhardswillbechenmeasureivenestings
eforreptilesound,measureturnedtosetoprovide
Ka
fromriverwoutfloodingp,notablyaecondition
supstreamamunities.OuPridePark,Risnotincrea
rameworkDtionscouldaileddesigngytoensure
abitatforkincarriedoutaestoavoidasiteswoulda
s.Areptilesurestoprotsemi‐naturareptilehabi
KingfishersalongtheRiv
Our City O
willallowthegpropertiesatChaddesdoftheriver.
anddownstrurCityOurRRaynesway,asedtothese
Directivehasaffectwateroftheoutfaethatthepro
ngfisherandayearbeforaffectingnesalsobecrea
surveywillbtectthepopualhabitatonitat.
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Derby City Council / Environment Agency | ES Non‐Technical Summary Our City Our River
Black&Veatch 14
TrafficandTransport
ThecompletedprojectwillreducefloodrisktolargesectionsoftheroadnetworkinDerby.However,duringafloodsomeroutesnexttoandacrosstheriverwillbeclosedwithfloodgatesanddemountableflooddefencestoallowfloodwatertomovedowntheriverinacontrolledway.
ATrafficManagementPlanwillbepreparedandfollowedduringconstructiontominimisedisruptioncausedbyadditionaltrafficandtemporaryclosuresofsomeroadsandcycleroutes.DarleyAbbeyMillsBridgewillbeclosedforoversixmonthstoreplacethebridgedeck.Thiswillcauseasignificantbuttemporaryeffectontheroadandcyclenetworkduetoareductioninthenumberofroutesacrosstheriver.
MaterialsandWaste
Materialsexcavatedduringconstructionwillbereusedwithintheprojectwhereverpossible.Forexample,materialfromloweringgroundlevelsatfloodconveyancerouteswillbereusedinfloodembankmentsorlandscaping,ifitissuitable.Topsoilwillalsobestoredandreused.
Constructingnewearthembankments,andraisingexistingembankments,atLittleChester,ChaddesdenSidings,Raynesway,AlvastonPark,AmbastonandShardlowwillneedlargequantitiesoffillandtopsoil.Theotherkeymaterialsneededaresheetpiles,concrete,aggregatesandfloodwallcladding.Materialswillbesourcedlocallywhereverpossible.
ASiteWasteManagementPlanwillbeusedtoidentifywherematerialcanbereusedwithintheproject,whichmaterialscanberecycled,andsuitablestorageanddisposalmethodsforwastethatcannotbereusedorrecycled.
CumulativeEffects
TheEIAconsideredwhetherchangestotheenvironmentcausedbyOurCityOurRivercouldinteractwithotherprojectstogeneratelarger,moresignificanteffectsthanwouldbecausedbyeachprojectindividually.ProposeddevelopmentsattheformerPoliceStationonFullStreetandattheNorthedgesitewithinAlfretonRoadIndustrialEstatehavepotentialtointeractwiththeeffectsofOurCityOurRivertocausesignificanteffects.
TheproposalsattheformerPoliceStationandatNorthedgehavethepotentialtoresultinadversecumulativeeffectswiththeOurCityOurRiverworksfromtrafficmovementsandthepotentialtodisturbcontaminatedland.TheseriskswillbemanagedthroughtheuseofTrafficManagementPlansonbothprojects,detaileddesigntakingintoaccountcontaminationrisks,andadherencetoconstructionmethodstatements.
Conclusions
OurCityOurRiverhasbeendevelopedinapartnershipbetweenDerbyCityCouncilandtheEnvironmentAgency.Theprojectwillhavethemajorpositiveeffectofreducingfloodriskforapproximately2,100homesandbusinessesandhelpingtoregeneratetherivercorridorthroughDerby.
TheEIAidentifiedanumberofpotentialnegativeeffectsontheenvironmentand,wherepossible,measurestoavoidorminimisetheseeffectshavebeenincludedintotheprojectdesign.MeasurestominimisethescaleofeffectsthatcannotbeavoidedhavebeendevelopedandrecordedinanEnvironmentalActionPlan,whichisincludedwithintheEnvironmentalStatement.