Environmental statement - IEMA · development comprising 16,000 new homes and 20,000 to 25,000 new...

MAYOR OF LONDON Transport for London

London Underground (Northern Line Extension) Order

Environmental statementNon-technical summary

Transport and Works Act 1992

N o n Te c h n i c a l S u m m a r y f o r t h e N o r t h e r n L i n e E x t e n s i o n

N o n Te c h n i c a l S u m m a r y f o r t h e N o r t h e r n L i n e E x t e n s i o n i

Table of Contents

1. INTRODUCTION 1

2. PROJECT OVERVIEW 2

3. DESCRIPTION OF THE NORTHERN LINE EXTENSION 6

4. THE ENVIRONMENTAL IMPACT ASSESSMENT PROCESS 12 (ASSESSING THE ENVIRONMENTAL EFFECTS)

5. SUMMARY OF ENVIRONMENTAL EFFECTS 13

TrafficandTransport 13

Socio-economics 14

ArchaeologyandBuiltHeritage 16

NoiseandVibration 17

AirQuality 19

ElectromagneticCompatibility 19

SurfaceWaterResourcesandFloodRisk 19

LandQualityandGroundwater 19

Ecology 23

TownscapeandVisualAmenity 23

ClimateChangeAdaptationandMitigation 25

6. THE NEXT STEPS AND HOW TO GET MORE INFORMATION 30

ii N o n Te c h n i c a l S u m m a r y f o r t h e N o r t h e r n L i n e E x t e n s i o n 1 . 0 I n t r o d u c t i o n

Figure1:TheNorthernLineExtension

1 . 0 I n t r o d u c t i o n N o n Te c h n i c a l S u m m a r y f o r t h e N o r t h e r n L i n e E x t e n s i o n 1

1.1 ThisdocumentpresentsaNon-TechnicalSummary(NTS)ofthepredictedimpactsontheenvironmentoftheproposedNorthernLineExtension(NLE).FulldetailsofthoseimpactsarecontainedintheEnvironmentalStatement(ES)thatURShaspreparedonbehalfofTransportforLondon(TfL).TheESaccompaniesTfL’sapplicationtotheSecretaryofStateforTransportforaTransportandWorksActOrder(TWAO)fortheproposedNLE.

1.2 ThisNTSincludes: ■ AbriefaccountofthebackgroundtotheNLEprojectandhowitrelatestotheVauxhallNineElmsBatterseaOpportunityArea(VNEBOA);

■ AdescriptionoftheNLEandthealternativesthatwereconsideredbyTfL;

■ AnoutlineoftheEnvironmentalImpactAssessment(EIA)processandatopicbytopicsummaryofthepotentialenvironmentaleffectsandthemeasuresproposedtominimiseadverseeffectsandmaximisepotentialbenefits;and

■ AnoutlineoftheTWAOprocess,includinghowinterestedpartiescancommentontheapplication.

1.3 TheprojectproposestoextendtheCharingCrossbranchoftheNorthernline,fromKenningtontoBattersea,includinganintermediatestationatNineElmsandaterminusatBattersea,closetoBatterseaPowerStation(BPS)(seeFigure1).TheextensionwillpassthroughtheLondonboroughsofLambeth,SouthwarkandWandsworth.

1.4 TheprimaryaimoftheextensionistoencourageeconomicgrowththroughenablingthesustainableregenerationoftheVNEBOA.TheVNEBOAisexpectedtoaccommodatesignificantgrowth,withdeliveryofahighdensitymixedusedevelopmentcomprising16,000new

homesand20,000to25,000newjobs.ThiswillincludetheredevelopmentoftheBPSsite.Thislevelofdevelopmentcannothappensustainablywithouttheappropriatetransportinfrastructure.

1.5 TheNLEisintendedtomeetanumberofthegoalsfortransportinLondonsetoutintheMayor’sTransportStrategy(MTS,2010),whichincludemeasuresto:

■ Supporteconomicdevelopmentandpopulationgrowth;

■ EnhancethequalityoflifeforallLondoners;

■ ImprovesafetyandsecurityforallLondoners;

■ ImprovetransportopportunitiesforallLondoners;and

■ Reducetransport’scontributiontoclimatechangeandimproveitsresilience.

1.6 TheMTSmakesspecificreferencetotheNLE,statingthattheMayorwillseeklonger-termenhancementsandextensionstotheUndergroundnetwork,including:

“A privately funded extension of the Northern line to Battersea to support regeneration of the Vauxhall/ Nine Elms/ Battersea area”.

1. INTRODUCTION

2 . 0 P r o j e c t O v e r v i e w2 N o n Te c h n i c a l S u m m a r y f o r t h e N o r t h e r n L i n e E x t e n s i o n

2. PROJECT OVERVIEW

2.1 TheproposedNLEistheresultofanextensiveexaminationofalternativetransportsolutions,alternativeroutesandalternativelocationsanddesignsforthestationsandshafts.Consultationwithawiderangeofstakeholders,suchastheLondonboroughsofLambeth,SouthwarkandWandsworth,statutoryconsultees,andmajorlandownersandthepublic,hasbeenimportantinthisprocess.Asummaryofthisworkispresentedinthefollowingsections.

Alternative Transport Solutions

2.2 ThedecisiontoextendtheNorthernlinewastakenfollowingareviewofalternativetransportsolutions,including:

■ AnextensiontotheNorthernline,butfromtheBankbranchratherthanCharingCrossbranch;

■ NewextensionsfromtheVictoria,District/Circle,BakerlooandWaterloo&Citylines;

■ AnautomaticmetroschemebetweenBPSandCharingCrossviaVictoria;

■ AnextensiontotheDocklandsLightRailwayfromBankstation;

■ Astand-alonelightrapidtransportscheme;

■ AcrossrivertramfromcentraltosouthLondon;

■ AspurfromCrossrail;

■ EnhancementtoexistingNationalRailandLondonOvergroundservices;and

■ Improvementstobus,rivertransportandcycleservicesandfacilities.

2.3 ThisreviewconcludedthatanextensiontotheCharingCrossbranchoftheNorthernlinewouldbethetransportsolutionthatwould:

■ BestmeettheneedsoftheVNEBOA;

■ AchievetherelevantgoalsoftheMTS;and

■ Alsobestfittheoverallpublictransportnetwork.

Alternative Route and Station Options

2.4 TheassessmentofalternativetransportsolutionswasfollowedbyaconsiderationofalternativeroutealignmentsfortheNLEandalternativestationlocations.Fourrouteswereconsidered(seeFigure2).AllfourrouteoptionswouldbeconnectedtotheexistingNorthernlineattheKenningtonLoop,atrainturnaroundfacilityontheCharingCrossbranch.Thefouroptionsconsideredwere:

■ Option1-DirectfromKenningtontoBPS;

■ Option2-KenningtontoBPSwithanintermediatestationwithintheNineElmsarea;

■ Option3-KenningtontoBPSviainterchangeatVauxhall;and

■ Option4-KenningtontoBPSwiththreepotentialalternativelocationbeforetheintermediatestations.

2.5 Therouteoptionswereassessedagainstarangeofcriteriaincludingengineeringfeasibilityandtransportandenvironmentalconsiderations.Theoptionswerealsosubjecttodetailedpublicconsultation.ThisworkconcludedthatRouteOptions2and4weremostfavourableduetotheprovisionofanintermediatestation.Itwasconsideredthattheseoptionswouldofferagreaterimprovementinairqualityduetoagreaterreductionincarandbustripsasaresultofmodalshift(i.e.peoplechoosingtotravelontheNorthernlineratherthanusingcarorbustransport)thanRouteOptions1and3.Also,bycreatingnewstations,RouteOptions2and4wouldprovidegreateropportunitytoenhancethetownscapearoundthe

2 . 0 P r o j e c t O v e r v i e w N o n Te c h n i c a l S u m m a r y f o r t h e N o r t h e r n L i n e E x t e n s i o n 3

intermediatestation,andespeciallyattheintermediatestationproposedforRouteOption2.Moreparticularly,anintermediatestationwouldsignificantlyenhancetheaccessibilityandregenerativebenefitsoftheprojectbyenablingtheVNEBOAasawholetobenefitfromenhancedtransportinfrastructure.

2.6 AlthoughRouteOption4resemblesRouteOption2insomerespects,byplacingtheintermediatestationinthenorthernpartoftheVNEBOA,itfailstooffertheearlybenefitsoftheNLEtotheexistingcommunitiestothesouthandeastoftheVNEBOAtothesamedegreeasRouteOption2.RouteOption4hasalessaccessiblelocationforitsintermediate

Figure2:Routeoptions

Nine Elms ‘North’

BatterseaNine Elms ‘South’

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South

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Nine

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Fentiman

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Buck

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Victoria

Mill

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StreetM

arshamRow

Roch

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Pimlico

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Belgrave

Drive

George's

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Grosvenor

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Bridge

Chelsea

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Queenstow

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George's

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London

Batters

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Road

River Thames

Myatt's Fields Park

BuckinghamPalace

L A M B E T HL A M B E T HL A M B E T HL A M B E T HL A M B E T HL A M B E T HL A M B E T HL A M B E T HL A M B E T HL A M B E T HL A M B E T HL A M B E T HL A M B E T HL A M B E T HL A M B E T HL A M B E T HL A M B E T HL A M B E T H

S O U T H WA R K

WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H WA N DSWO RT H

W E ST M I N ST E R

Elephant & Castle

LambethNorthSt. James's Park

WestminsterPier

Battersea Park

Queenstown Road (Battersea)

Wandsworth Road

Pimlico

Millbank Pier

Clapham High Street Clapham North

Vauxhall

Oval

Kennington

Loughborough Junction

Victoria

Stockwell

© Crown copyright. All rights reserved (GLA) (100032379) 2013Cartography by Steer Davies Gleave 2013N 0 250 500 m

Route Alignment 4

Route Alignment 3

Route Alignment 2

Route Alignment 1

Proposed Station

Route Alignment Options 1-4

2 . 0 P r o j e c t O v e r v i e w4 N o n Te c h n i c a l S u m m a r y f o r t h e N o r t h e r n L i n e E x t e n s i o n

station,andhaslowerjourneytimesavingscomparedtoRouteOption2.

2.7 RouteOption2isexpectedtoachievethegreatestpatronage(andcartransfer)andthegreatestrelieftocrowdingforexistingusersoftheUnderground.Additionally,RouteOption2performedthestrongestintermsofassessedtransportbenefits.RouteOption2wasalsoidentifiedasthemostpopularroutewiththepublicduringthepublicconsultationsofsummer2010and2011,andisalsosupportedbytheLondonBoroughofLambeth(LBL)withinwhichtheintermediatestationwouldbelocated.

2.8 Asaresultofthis,RouteOption2wascarriedforwardtothenextstageofdevelopment,wheremoredetailedprojectandsitespecificaspectswereconsidered.

Site Specific Options and Alternatives

2.9 Indevelopingthepreferredschemedesign,considerationwasgiventoanumberofkeycomponentsoftheproject:

■ Theoptimalalignment(routeanddepth)ofthetunnels;

■ Thelocationanddesignofthetwonewstations,oneatBPSandoneatNineElms(broadlyatthecornerofWandsworthRoadandPascalStreet);

■ Thelocationofthreepermanentventilationandinterventionshaftsrequiredalongtherouteandtheassociatedabove-groundstructurereferredtoasaheadhouse:

■ OneforthenorthboundtunnelinthevicinityofKenningtonGreen;

■ OneforthesouthboundtunnelinthevicinityofKenningtonPark;and

■ OnewheretherunningtunnelsconvergeintheClaylandsRoadarea.

■ Thelocationoftwotemporaryshafts(oneforthenorthboundtunnelandoneforthesouthboundtunnel)tostabilisethegroundandmaketheconnectiontotheexistingrailwayontheKenningtonLoop.

2.10 Todevelopapreferredalignment,anumberofaspectshadtobeconsidered,includingthefeasibilityofconstruction,operationsandenvironmentalperspective.Thehorizontalandverticalalignmentofarunningtunneldirectlyinfluencesthequalityofthetrainjourney,andthemostefficientroutewouldbeastraightline.Thiswouldbeeasiertoconstructandwouldalsohaveoperationaladvantages.However,thealignmenthastobedevelopedinthecontextofexistingconditions,suchaspilingfrombuildings,geologicalconditionsandtheexistenceofotherinfrastructuresuchaswaterpipesandotherUndergroundtunnels,whichlimitstheopportunitiesforstraightlines,althoughthesehavebeenincludedwherepossible.

2.11 Thelocationofthestationswasinfluencedbyanumberoffactors,including:

■ Theavailabilityofsuitableland,minimisingdisruptionanddemolition,includingtherequirementforappropriatetemporaryworksites;

■ ThereductionofovercrowdingatNorthernlinestationstothesouth(e.g.Oval);and

■ Theneedtointegratethedesignwith,whilstmaintainingoperationalindependencefrom,thatoftheoversitedevelopments(OSD-thedevelopmentthatwilltakeplaceimmediatelyabovethetwonewstations).

2.12 Thefunctionofparticularshaftsdictatesthebroadlocationofeachshaft.Anumberofalternativeswereconsideredagainstarangeofcriteria,includingconstructabilityandavailabilityofasuitableworksite,theamountoftemporaryandpermanentlandtakeandpropertyacquisition,theamountofdisruptiontotreesandecology,thedistancetoresidentialpropertiesandotherreceptors,andthepresenceofheritageandtownscapeconstraints.

2.13 Theproposedroute,includingthelocationsforthestationsandthepermanent

2 . 0 P r o j e c t O v e r v i e w N o n Te c h n i c a l S u m m a r y f o r t h e N o r t h e r n L i n e E x t e n s i o n 5

shafts,wasalsothesubjectofapublicconsultationexerciseinsummer2011;theresultsofwhich,amongstotheroutcomes,alsoultimatelyledtotheshaftintheClaylandsRoadareabeingdeletedfromtheproposals.

2.14 Thedeletionofthisshaftwasmadepossiblebythedevelopmentofanalternativefireandevacuationoperationalstrategy,whichrequiredanincreasetotheinternaldiameterofthetunnelsinordertoaccommodateawalkway.TheotherfunctionsofthisshaftwillnowbeachievedbymodificationstotheproposedpermanentshaftsatKenningtonParkandKenningtonGreen,aswellasatNineElmsstation.

2.15 Thelocationofthetwotemporaryconstructionshaftswassubjecttoconsultationwithlocalresidentsandbusinessesinautumn2011.AnumberofpotentialsiteswereidentifiedbasedonfactorssuchasproximitytotheKenningtonLoop,availabilityoflandandpotentialenvironmentaleffects.

2.16 Followingconsultationinautumn2012,afurtherreviewofthelocationsofthepermanentshaftswasundertaken.Thisconfirmedthattheselectedoptionsremainthebestavailable.

2.17 TheproposedNLEthereforerepresents,takingintoaccountallrelevantassessmentcriteria,thebestpossiblealignmenttomeettheproject’sstatedaims.

3 . 0 D e s c r i p t i o n o f t h e N o r t h e r n L i n e E x t e n s i o n6 N o n Te c h n i c a l S u m m a r y f o r t h e N o r t h e r n L i n e E x t e n s i o n

3. DESCRIPTION OF THE NORTHERN LINE EXTENSION

3.1 Figure3illustratestherouteandprincipalfeaturesoftheNLE.TheNLEworkscomprisetheconstructionofanundergroundrailwaytoformanextensionoftheNorthernline(CharingCrossbranch)fromKenningtontoBattersea.ItwillleavetheexistingrailwaysouthofKenningtonstationfromasectionoftrack(theKenningtonLoop)usedbyterminatingtrains.Itwillrequiretheconstructionoftwotunnels(onenorthboundandonesouthbound)approximately3,000minlength.

3.2 FromtheKenningtonLoopthetracksdiverge,withthesouthboundtunnelpassingbeneathKenningtonPark,andthenorthboundtunnelpassingbeneathKenningtonRoad,andthesouthernboundaryofOvalcricketground.Thetracksthenconvergetoapproximatelyparallelalignmenttothesouth-eastofTheOval,passingbeneathSouthLambethRoadandWandsworthRoad,beforeenteringthestationboxfortheproposedNineElmsstation.

Figure3:TherouteandprincipalfeaturesoftheNLE

Batterseastation

NineElmsstation

KenningtonGreenshaft

KenningtonParkshaft

3 . 0 D e s c r i p t i o n o f t h e N o r t h e r n L i n e E x t e n s i o n N o n Te c h n i c a l S u m m a r y f o r t h e N o r t h e r n L i n e E x t e n s i o n 7

3.3 AfterpassingundertherailwayviaductsouthofVauxhall,thetunnelsturntoasouth-easterlyalignment,passingunderNineElmsLane,beforeenteringthestationboxfortheproposedterminusatBatterseainthesoutherncorneroftheBPSsite,adjacenttoBatterseaParkRoad.

Construction Details

3.4 ThetunnelsbetweenBatterseastationandtheKenningtonshaftswillbeconstructedusingtwoTunnelBoringMachines(TBM)launchedfromtheproposedBatterseastation,whichwillthenworkeastwardstowardsthepermanentshafts.

3.5 Therearetwomainconstructionmethodologies(bothofwhichwereassessedbytheEIA)proposedforthetunnelsbetweentheKenningtonshaftsandtheconnectionstotheexistingKenningtonLoopthatuseeitherTBMsorsprayedconcreteliningtoconstructthetunnelstothejunctionswiththeKenningtonLoop.Onemethodwouldrequiretemporaryshaftstobeconstructedandtheotherwouldrequiregallerytunnelsbelowgroundtobeconstructed.

3.6 Ongoingengagementwithcontractorswillinformthefinaloptionthatisselected.

Construction Programme

3.7 ConstructionoftheNLEisexpectedtolastapproximately5years.Itisanticipatedthattunnellingworkswillstartduring2015,withthepossiblerequirementofancillaryorenablingworksbeingundertakeninadvanceofthis.WorksontheshaftsinKenningtonwillbegininsummer2016.ServicesontheNLEareproposedtocommenceby2020.

3.8 WorksatBattersea,associatedwithboththestationandthelaunchoftheTBMsforconstructionoftherunningtunnelsisanticipatedtolastforapproximately3yearsand7months;whilstworksatNineElmsstationisanticipatedtolastapproximately4yearsand4months.

3.9 AtKenningtonGreenandKenningtonPark,worksarelikelytorunforapproximately3yearsand2months,and3yearsand9monthsrespectively,dependingonthechosenconstructionmethod(itwouldlastlongerwithoutthetemporaryshafts).Iftheselectedconstructionmethodrequirestheuseofthetemporaryshafts,thisislikelytolastforapproximately2yearsand2monthsattheselocations.

Construction Worksites

3.10 Constructionwillbeundertakenfromaseriesofconstructionworksitessituatedalongtherouteasfollows:

■ Asiteatbothproposedstations:BatterseaandNineElms;

■ Asiteatbothproposedpermanentshafts,KenningtonParkandKenningtonGreen;and

■ Asiteatbothproposedtemporaryshafts,RadcotStreetandHarmsworthStreet(onlyiftheconstructionmethodchosenrequiresthem).

3.11 ThesewereselectedonthebasisthattheywouldprovidesufficientspacefortheworksrequiredineachcaseandwitheasyaccesstothesurroundingroadnetworkandtheRiverThamesfortransportationofmaterials.

Battersea Station Worksite

3.12 Theworksitewilloccupyanareaofapproximately51,500m2.Thestationandassociatedcrossoverboxwillbeexcavated;withmaterialfromthislocationandtherunningtunnelsthatisnotcontaminatedlargelybeingremovedbybargeviatheriver.ThiswillrequireaconveyoracrosstheBPSsitetotheexistingjetty.Minorworkstothejetty,aswellasdredgingoftheexistingjettyberthingpocket,mayberequiredtoallowbargestobeloaded.


Nine Elms Station Worksite

3.13 Theworksitewilloccupyanareaofapproximately15,000m2.Duringconstruction,demolitionofallexistingstructuresonthesite,includingbuildingsassociatedwithSainsbury’s,CoventGardenMarketAuthority(CGMA)andBanhamSecurity,willberequiredtoenableexcavationofthestationbox.

Kennington Park and Kennington Green Worksites

3.14 TheKenningtonParkworksitewilloccupyanareaofapproximately3,000m2.TheKenningtonParkshaftandheadhousewillbelocatedinthenorth-eastcorneroftheparkbetweenKenningtonParkPlaceandStAgnesPlace.Thiswillrequirethedemolitionofthelodge(referredtoasKenningtonParkLodge)atthissite,currentlyusedasacommunityfacility.Temporaryreplacementfacilitiesareproposeduntilpermanentreplacementfacilitiesareavailablefollowingthecompletionofconstructionworks.

3.15 TheKenningtonGreenworksitewilloccupyanareaofapproximately2,300m2.TheKenningtonGreenshaftwillbelocatedwithinthegreenitselfandtheheadhousewillbelocatedwithinthelandownedbytheBeefeaterGindistilleryonthecornerofMontfordPlaceandKenningtonRoad.Thiswillrequiredemolitionoftheexistingboundarywall.Awatertankistobeprovidedforthedistilleryonlandadjacenttothenorth-westofthedistilleryonMontfordPlace,asanaccomodationwork.

Temporary Construction Shafts

3.16 Asmentionedpreviously,oneofthepossibleconstructionmethodsrequirestwotemporaryshaftstobelocatedclosetothelocationofthejunctionswiththeexistingKenningtonLooptoenabletheTBMstobedismantledandtosupportconstructionactivitiesassociatedwiththosejunctions.

3.17 TheworksiteandtemporaryshaftatRadcotStreet(coveringapproximately

300m2)willservethenorthboundtunnelandHarmsworthStreet(330m2)thesouthbound.

3.18 Again,ongoingengagementwithcontractorswillinformthefinaloptionthatisselected.

Cross Passages at Kennington Station

3.19 Fournewpassengercrosspassages(twoadditionalbetweenboththesouthboundandthenorthboundplatforms)willbeconstructedatplatformlevelinKenningtonstation.Thesewillrelievepotentialcongestionontheexistingplatforminterchange.Tocarryoutthiswork,temporaryplatformclosuresarelikelytobenecessarybutdisruptionwillbekepttoaminimum.

Materials Management Strategy

3.20 TheaimofthematerialsmanagementstrategyfortheNLEistodivertasmuchsurplusmaterialfromlandfillaspossible.Surplusexcavatedmaterialisanticipatedtobegeneratedfromthetwostationsites,thetunnels,theshaftsitesandtheconnectionstotheexistingtunnelatKenningtonLoop.

3.21 ExcavationfromtheproposedNineElmsstationsiteandtheshaftsintheKenningtonareawillberemovedbyroad.AlargeproportionofexcavationmaterialfromtheproposedBatterseastationandassociatedwiththeTBMsconstructingthetunnelsisanticipatedtoberemovedbybargefromtheexistingjettyatBPS.Itisestimatedthatapproximately70%(byvolume)ofmaterialwillberemovedbybarge,withtheremainderbyroad.

3.22 Contaminatedmaterialwillbesenttoasuitablesitefordisposal,eitherinasegregatedbarge(i.e.separatefromthebargesremovingotherexcavatedmaterial)orbylorry.

Construction Traffic

3.23 Alloftheworksiteshavegoodexistingaccesstothestrategicroadnetwork.Itis


assumedthataccessroutestoworksiteswillbeviasouthLondon,withlorriesgenerallyusingthefollowingstrategicroads:

■ KenningtonParkRoad/ClaphamRoad;

■ KenningtonRoad;

■ WandsworthRoad;and

■ NineElmsLane/BatterseaParkRoad.

3.24 Therearenostrategicroadclosuresplanned;howevertherewillbetemporaryclosureofthenorthboundbuslaneonKenningtonRoadduringworksassociatedwiththepermanentshaftatKenningtonGreen.TemporaryclosureandtrafficcontrolswillbeusedforactivitiessuchasthedeliveryandremovalofTBMs.

3.25 ThetemporaryshaftsrequiredunderoneofthepossibleconstructionmethodswillrequirethetemporaryclosureofRadcotStreetandHarmsworthStreet.

Code of Construction Practice (CoCP) and Noise Mitigation

3.26 TheCoCPisincludedinVolumeIIoftheESandsetsoutthestandards,proceduresandmeasurestoprotecttheenvironmentthatwillbeadoptedduringtheconstructionoftheNLE.Itcoversenvironmentalandpublichealth,andsafetyaspectsoftheprojectthatmayaffectlocalresidents,businessesandthesurroundings.TheCoCPoutlinesmitigationmeasuresandtheenvironmentalprinciplestobefollowedonsite.

3.27 Normalworkinghoursforabovegroundworksareplannedtobefrom0800to1800onweekdays(excludingBankHolidays)and0800to1300onSaturdays.Activitiessuchasmaintenance,sitebriefings,meetingsandtrainingwilltakeplaceforuptoonehourbeforeandafterthesetimes.Non-disruptivepreparatorywork,repairsandmaintenancemaybecarriedoutonSaturdayafternoonsorSundaysbetween1000and1600.Tunnellingactivitieswouldrequirecontinuousworkinghoursoveraperiodofupto22months.

3.28 Inadditiontothis,TfL’sNLEConstructionNoiseandVibrationMitigationSchemedocumentsetsoutmeasurestoprovidenoiseinsulationandtemporaryrehousingasmitigationincertaincases.

Figure4:Projectspecificconstructionmitigation

- 0 -

Northern Line Extension (NLE)

Code of Construction Practice - Part A

April 2013

DRAFT

Editor: Nick Street

Consents Manager

Approved by:

Project Manager

Date:

Authorised by:

Project Director

Date:

Transport for London

London Underground

London Underground Northern Line Extension

Construction Noise and Vibration Mitigation Scheme

Issue No.: 1

Issue date: November 2012

Review date:

MAYOR OF LONDON

Operational Details

Battersea Station

3.29 TheproposedterminusatBatterseaislocatedsouthofBPS,paralleltoBatterseaParkRoad.AvisualisationshowingtheabovegroundelementsofthestationisprovidedinFigure5andanillustrativesectionisshowninFigure6.PedestrianaccesstothestationwillbefromBatterseaParkRoadandwillbeatstreetlevelviaafreestandingentrancepavilion.

3.30 AsshowninFigure5,thedesignofthestationwillbefullyintegratedwiththeproposedredevelopmentofBPS,whichwilleventuallyaccommodatenearly4,000homeswithnewshops,restaurants,cafesandbars,offices,hotelandconferencefacilities,communityfacilitiesandanewriversidepark.Thestationwillbelocatedatthesouthernendoftheretailstreet,knownasthe‘HighStreet’,setbackfromBatterseaParkRoad.

3.31 TheillustrativelandscapemasterplanforthestationisshowninFigure16a,attheendofthisdocument.

Nine Elms Station

3.32 TheproposedintermediatestationatNineElmsislocatedonWandsworthRoad


Figure5:VisualisationofBatterseastationwithmassingoftheOSD(facingnorth-eastfromBatterseaParkRoad)

Figure6:IllustrativesectionsofBatterseastation

withinthesouthernpartoftheexistingSainsbury’scarpark.ThestationwillhaveastreetleveltickethallwithentrancesfromWandsworthRoadandPascalStreet.AvisualisationisshowninFigure7andanillustrativesectionisshowninFigure8.

3.33 AnewpedestrianwalkwaywillbecreatedtothenorthofthestationasacontinuationofthepavementonPascalStreet.This

willconnecttotheemergingCGMAdevelopmentandbeyond.TheillustrativelandscapemasterplanisshowninFigure16b,attheendofthisdocument.

Kennington Park and Kennington Green Shafts and Head Houses

3.34 ThepermanentshaftsatKenningtonParkandKenningtonGreenarerequiredtoprovidegeneraltunnelcooling,ventilation,


smokecontrolandemergencyinterventiontothetunnels.

3.35 AtKenningtonGreen,theheadhousewillprovideapproximately270m2ofspaceforventilationandinterventionandmaintenanceaccess.Inaddition,theheadhousewillprovideatleast45m2ofexternallouvrestoallowformaintunnelventilation.

3.36 Thematerialshavebeenselectedtoreflecttheadjacentproperties,withtheproposedwallstocompriseLondonStockbrick.ThescaleandmassingofthestructurerelatestotheproportionsoftheexistinghousesontheGreen,withbuildingofresidentialproportions,asmallertopstoreyandasetbackroof.ImagesofthefunctionalityandappearanceareprovidedinFigures12and13.

3.37 AtKenningtonPark,theheadhousewillprovideatleast45m2ofexternallouvrestoallowformaintunnelventilation,

andareplacementcommunityfacility(81m2)andoutdoorgardenspace.Itwillalsoincorporateprovisionforatractionsubstationbelowgroundtoprovidepowertotherailway.ImagesshowingthefunctionalityandappearanceareprovidedinFigures14and15.

3.38 IllustrativelandscapemasterplansforthesepermanentshaftsareshowninFigure16c-dattheendofthisdocument.

Operational Details

3.39 TrainsfromtheCharingCrossbranchwillservetheNLEwithaninitialoperationservicefrequencythatwillprovide16trainsperhour(tph)increasingtoupto28tphineachdirectionatpeaktimesby2031,withajourneytimeof5-6minutesbetweenKenningtonandBatterseastations.

Figure8:IllustrativesectionofNineElmsstation

Figure7:AvisualisationofNineElmsStation(facingnorth-eastonWandsworthRoad)

4 . 0 T h e E n v i r o n m e n t a l I m p a c t A s s e s s m e n t P r o c e s s12 N o n Te c h n i c a l S u m m a r y f o r t h e N o r t h e r n L i n e E x t e n s i o n

4. THE ENVIRONMENTAL IMPACT ASSESSMENT PROCESS (ASSESSING THE ENVIRONMENTAL EFFECTS)

Requirement for an Environmental Impact Assessment

4.1 Manydevelopmentproposalsbyvirtueoftheirsize,locationand/orsubjectmattermusthavetheirenvironmentaleffectsassessedandreported.ThisappliestotheNLE.Theassessmentassiststhedevelopmentoftheprojectbyensuringthatitisdesignedtolimitanyadverseeffectsandmaximisepositiveeffectsonthesurroundingcommunity.Italsohelpsdecisionmakers,inthiscasetheSecretaryofStateforTransport,tounderstandtheenvironmentaleffectsoftheNLE,beforedecidingwhethertogiveconsentfortheschemetoproceed.

4.2 ThewaythatenvironmentaleffectsshouldbeassessedisdefinedbylawandguidanceandtheserequirementshavebeenfollowedfortheNLE.ApplicationsforaTWAOmustfollowtheTransportandWorks(ApplicationsandObjectionsProcedure)(EnglandandWales)Rules2006andanEIAhasbeenundertakenandanESpreparedandsubmittedtoaccompanytheTWAOApplication.

4.3 TheEIAprocessisessentiallyasystematicprocedure,usingthebestpracticabletechniquesandbestavailablesourcesofinformation,todeterminethepotentialimpactsofaproposeddevelopment(bothpositiveandnegative)andtheirsignificance.Italsoprovidesanopportunityforpublicscrutiny.ThisenablestheimportanceofpredictedenvironmentaleffectstobeevaluatedbytheSecretaryofStatetoensureaninformeddecisionontheapplication.

4.4 ThepurposeoftheEIAisthreefold: ■ Topredictenvironmentaleffectsandtheirsignificance;

■ Toidentifymeansofreducingeffects(i.e.theinclusionofmitigation);and

■ Todescribetheremaining(‘residual’)effectsaftermitigation.

4.5 ThescopeoftheEIAwasestablishedthroughtheproductionoftwoEIAScopingReports(in2010and2011,withthesecondbeingroutespecific).ThefollowingissuesweresubsequentlyassessedintheEIA:

■ Trafficandtransport;

■ Socio-economics;

■ Archaeologyandbuiltheritage;

■ Noiseandvibration;

■ Airquality;

■ Electromagneticcompatibility;

■ Surfacewaterresourcesandfloodrisk;

■ Landqualityandgroundwater;

■ Ecology;

■ Townscapeandvisualamenity;and

■ Climatechangeadaptationandmitigation.

4.6 TheresultsoftheEIAarereportedindetailintheESwhichidentifiesandassessesthelikelysignificantenvironmentaleffectsoftheNLEinrelationtobothdemolition/constructionandoperationalphases.TheresultsaresummarisedinthisNTS.

Mitigating Adverse Effects

4.7 Wheresignificantadverseenvironmentaleffectsareanticipated,mitigationmeasureshavebeenidentifiedtooffsetorreducetheeffect.Thisincludeschangestotheschemedesign,mitigationthroughcontrolsduringdemolitionandconstruction(normallysetoutintheCoCP)andmitigationthroughoperationalmanagement.Wherepossible,measureshavealsobeenintroducedtoachieveagreaterenvironmentalbenefit.

5 . 0 S u m m a r y o f E n v i r o n m e n t a l E f f e c t s N o n Te c h n i c a l S u m m a r y f o r t h e N o r t h e r n L i n e E x t e n s i o n 13

5. SUMMARY OF ENVIRONMENTAL EFFECTS

5.1 ThissectionoftheNTSpresentsatopicbytopicsummaryofthekeyfindingsfromtheEIA.

Traffic and Transport

5.2 ThisassessmentconsiderstheimpactoftheNLEonthehighway,publictransportandpedestrianandcyclenetworksbothduringconstructionandoperation.

Construction

5.3 Duringconstruction,impactsonthepublictransportnetworkwillbeminimal.Aroundsixshort-termclosuresoftheKenningtonLoopwillberequiredresultinginareducedservicefrequencyonbothbranchesoftheNorthernline.Additionally,therewillbesomelimiteddisruptiontointerchangeatKenningtonstationforashortperiodoftimeduringtheconstructionofthenewcrosspassages.

5.4 ClosureofpartofthebuslaneonKenningtonRoadduringworksatKenningtonGreenwillnotsignificantlyimpactbusoperationsastwo-waytrafficcanbemaintained.

5.5 Adverseeffectswillalsooccuronthehighwaynetwork,andforparking,cyclistsandpedestrians.

5.6 Additionaltrafficgeneratedbyconstructionwillresultintwoalreadybusyjunctionsbecomingbusier–namelythejunctionofKenningtonParkRoadwithKenningtonParkPlaceandthejunctionofWandsworthStreetwithPascalStreet.Thiseffectwillonlylastforaroundsixmonthsintotalandwillbemitigatedbycarefulmanagementofconstructiontrafficattheselocations.

5.7 AccesstoandfromtheconstructionsitesviathemajorroadnetworkisgoodandtheonlyminorroadclosureswouldbeatRadcotStreetandHarmsworthStreet

shouldthismethodbechosen.Thiswouldonlyaffectlocaltraffic.

5.8 Anumberofon-streetparkingspaceswillbelosttemporarilyaroundtheshaftandNineElmsstationworksitesduringconstruction.Thisisconsideredtobeanadverseeffect;howeversufficientalternativeprovisionisavailablenearby.

5.9 Theadverseeffectoncyclistsasaconsequenceofincreasedlorrymovementsgeneratedduringconstructionwillbemitigatedbytheprovisionofalternativeroutes,ensuringhighfleetsafetystandardsandraisingawarenessofcyclingsafetyamongstboththecyclingcommunityandcontractorsinlinewithTfLguidance.

5.10 Pedestrianfootwayclosuresarelimited.Signagedirectingpedestrianstoalternativenearbyrouteswillbeprovidedandtrafficmarshallingifnecessary.

Operation

5.11 PublictransportaccessibilityacrosstheVNEBOAwillbetransformedwiththeNLE,particularlyinthewesternandcentralpartsoftheOAaroundthetwonewstations.Figure9illustratesthemajorbeneficialeffecttheNLEwillhaveonpublictransportaccessibilitylevels(PTALs)incomparisonwiththeexistingsituation.ThiswillmaketheareamorecharacteristicofcentralLondonandprovideexistingandnewcommunitieswithbetterpublictransportchoices.

5.12 TheNLEwillgenerateaforecastincreaseinpassengerflows,particularlyontheCharingCrossbranchoftheNorthernline.ThisiswithinthefuturecapacityofthelineandwillnotresultindetrimentalimpactsoneithertheNorthernlineorthewidernetwork.ImprovementsingeneraljourneytimestoandfromtheOAwillhaveamajorbeneficialeffectonpublictransportusersoverall.

5 . 0 S u m m a r y o f E n v i r o n m e n t a l E f f e c t s14 N o n Te c h n i c a l S u m m a r y f o r t h e N o r t h e r n L i n e E x t e n s i o n

Figure9:CurrentPTAL(left)andforecastPTALwiththeNLE,2031(right)

5.13 Improvementstocross-platforminterchangeatKenningtonstationwillalsohaveabeneficialeffectontheoperationofthisstationasitwilloperateatamoreefficientlevelthanitwouldwithouttheNLE.ThecongestionreliefprovidedatVauxhallstationasaresultofthedemandthatistransferredfromthiskeystationtotheNLEwillalsohaveabeneficialeffect.

5.14 EnhancementstothepedestrianandcyclingenvironmentswilloccurbothdirectlyasaconsequenceoftheNLEandindirectlyasaconsequenceoftheadditionaldevelopmentthatwillbeenabledintheOA.Newcycleparkingfacilitieswillbeprovidedatbothnewstations,andaccessfromthesurroundingareatothenewstationswillbeimprovedthroughtheopeningupofnewroutes.Improvedfootways,cyclepaths,signageandlightingwillbeprovidedaspartofthewiderOAdevelopment.

5.15 WhilstthetrafficgeneratedbythedevelopmentenabledintheOAwillresultincongestiononthehighwaynetwork,theimpactwillbelimitedandconcentratedaroundtheBPSsite.ThistrafficisnotadirectresultoftheNLE,butratherasaconsequenceoftheadditionaldevelopmentthatwillbeenabledbytheNLE.

Socio-Economics

5.16 Thefindingsofthesocio-economicassessmentcanbesummarisedasfollows:

Employment

5.17 Duringconstruction,theNLEwillgenerateanestimatednet1,035jobsperannum,901ofwhichareestimatedtobesupplieddirectfromwithinGreaterLondon.ThisisconsideredtorepresentaminorbeneficialeffectontheGreaterLondoneconomy.

5.18 Duringoperation,itisestimatedthatthetotalnetemploymentfortheNLEwillbe134employees,ofwhich117willbefromGreaterLondon.

5.19 Moresignificantly,longertermbenefitswillberealisedduringtheoperationalphase.DirectemploymentopportunitieswillbecreatedbytheNLEwithadditionalemploymentcreationarisingfrominducedandindirectimpacts.

Open Space

5.20 TheconstructionoftheKenningtonGreenandKenningtonParkventilationshaftswillrequirethecordoningoffofthegreenandpartoftheparkforthedurationof


theconstructionworks,resultinginthetemporarylossofthisareaofopenspace.

5.21 GiventhatmostofKenningtonParkwillremainavailableforuseduringconstruction,anditsproximityasanalternativeareaofopenspaceforusersofKenningtonGreen,thetemporarylossofopenspaceisconsideredtorepresentaminoradverseeffect.

5.22 Howevertheseareaswillbereturnedtouseasopenspacefollowingcompletionoftheworks.Thereinstatedopenspacewillbeofgreaterdesignqualitythanatpresent(seeFigures10and16).Onceoperational,theeffectonopenspaceisconsideredtobebeneficial.

Impact on Existing Businesses – Banham Security, CGMA, Tropical Catering, Sainsbury’s and Battersea Dogs and Cats Home (BDCH)

5.23 TheconstructionofNineElmsstationwillrequirelandcurrentlyoccupiedbyBanhamSecurity,TropicalCateringandCoventHouse,theheadofficeofCGMA.Theseoccupierswillrequirenewpremisestooperatefromforthedurationoftheconstructionworks.ItisassumedthatBanhamSecuritywouldseektorelocatetoanalternativelocationandthatCGMAwouldseektorelocatetheirheadofficetoanalternativelocationwithinthewiderCGMAsite,likelytothenorthoftheconstructionworksite.

5.24 TheconstructionofNineElmsstationwillalsorequirecarefulphasingsothatitisintegratedwiththeSainsbury’sdevelopmentontheadjacentland.

5.25 AttheBatterseastationsite,workswillrequireashort-termuseoflandwithintheBDCHsiteinordertoconstructtheoverruntunnels.Temporaryaccommodationwillbeprovided.

5.26 TfLwillworkwitheachaffectedlandownertoensurethatthebestsolutioncanbefoundtominimiseimpactsontheir

businessoperationssuchaspotentialrelocationandphasingofNLEworks,oranycompensationrequiredunderthestatutorycompensationcode.However,thedisplacedbusinessesarelikelytoexperiencesomedisruptionandinconvenienceaspartoftherelocationprocessand,forthatreason,theNLEislikelytoresultinaminoradverseeffectduringconstruction.

Impact on Existing Businesses – Beefeater Gin Distillery

5.27 Constructionwillrequirethetemporaryoccupationofpartofthedistillery’syardarea,temporaryreconfigurationofthevehicularandpedestrianaccessarrangementsfromKenningtonGreenandtheprovisionofcertainmitigationmeasures.Thesewillensurethesafeco-existenceoftheheadhousebuildingwithitsplant/ventilationequipmentandthedistillery’soperations(includingthewatertank)suchthattheeffectsonthedistillery’sbusinesswillbenegligible.

Community Facilities

5.28 KenningtonParkLodgewillbedemolishedasaresultoftheconstructionworks.Thelodgeiscurrentlyusedbycommunityorganisationswhowillneedtoberelocated.NewtemporaryreplacementbuildingsfortheoccupiershavebeenproposedbyTfLnearbywithinKenningtonParkandwillbeconstructedpriortodemolitionofthelodge.

5.29 Onceconstructionoftheshaftiscomplete,anewheadhouseandcommunitybuildingwillbebuilttoreplaceandexpandtheexistingfunctionsofKenningtonParkLodgeresultinginminorbeneficialeffects.

Wider Socio-Economic Effects

5.30 TheNLEisthecatalystfordeliveringupto5,500additionalresidentialunitsand14,000additionaljobsintheOAcomparedtowhatwouldhappeniftheNLEwasnotbuilt.ThisisasignificantshareoftheLondonPlantargetsandoftheBoroughs’


housingtargets.InLondonBoroughofWandsworth’scase,theVNEBOAiscriticaltodeliveringitshousingtarget.AswellastheoverallpositiveeconomiceffectontheVNEBOA,theNLEwillserveGreaterLondonthrough:

■ Improvingaccesstoemploymentopportunitiesforresidents;and

■ Improvingconnectivitybetweenemploymentareas.

Archaeology and Built Heritage

5.31 PartsoftheNLEliewithinoradjacenttothefollowingdesignatedheritageassets:

■ TheheadhouseabovethesouthboundtunnelislocatedinthenorthernedgeofKenningtonPark,aGradeIIlistedRegisteredParkandGarden.Thelodgebuildingisnotlisted;

■ Althoughnoneofthesitesofabovegroundworkscontainlistedbuildings,theyarewithinthesettingofanumber

oflistedbuildingsofhighsensitivity.TheRadcotStreettemporaryshaftiswithintheKenningtonConservationArea.TheworksatKenningtonParkarewithintheStMark’sConservationArea,KenningtonParkandanumberoflistedbuildingsofhighsensitivity.TheworksatKenningtonGreenarewithintheKenningtonConservationArea,KenningtonGreenandanumberoflistedbuildingsofhighsensitivity.TheNineElmsstationsitecontains19thand20thcenturyindustrialbuildingsoflowtomoderatesensitivity.TheBatterseastationsiteiswithinthesettingoftheGradeII*listedBPSandalocallylistedbuilding(WhittingtonLodge)ofmediumsensitivity;

■ Kenningtonstation,wherenewpassengercrosspassagesareproposed,isGradeIIlisted;and

■ Thenorthernsectionsoftheproposedroute(northboundandsouthbound)crosstwoArchaeologicalPriorityAreas

Figure10:Modelofproposedopenspaceimprovements,landscapingandheadhousedesigninKenningtonPark


(APA)inLambeth.Thesouthernsectionoftheproposedroute(northboundandsouthbound)crossesanAPAinWandsworth.

5.32 Archaeologicalpotentialisvariedacrossthesixsites.ThepotentialforagriculturalremainsrangesfromuncertainatKenningtonParkandlowtomoderateatHarmsworthStreet,RadcotStreetandKenningtonGreenwithacorrespondingverylowtomediumsensitivity.ThearchaeologicalpotentialforprehistoricandRomanremainsrangesfromunknown/uncertainatHarmsworthStreet,RadcotStreet,KenningtonParkandNineElmsstationtolowatBatterseastationwithacorrespondinglowtohighsensitivitydependingondate,nature,extentandpreservation.KenningtonGreenandNineElmsstationhavelowtomoderatepotentialforremainsoflate18th/mid-19thcenturybuildingsandrailwayfeatureswhichareconsideredtobeoflowsensitivity,andthepotentialfor20thcenturyremainsofrailwayfeaturesandbuildingsatBatterseastationishighbutwithalowsensitivity.Geo-archaeologicalandpalaeo-environmentalremainsatNineElmsandBatterseastationsareconsideredtobeofmoderateandhighsensitivityrespectivelyandofmediumsensitivity.Finally,thereisahighpotentialforremainsoftheVauxhallWaterWorksreservoirtobepresentalthoughthesensitivityofsuchremainsisconsideredtobelow,andamoderatepotentialwithmediumsignificanceofriversidestructuresandorganicremainstobepresentattheBatterseastationsite.

5.33 AdverseeffectsonburiedheritageassetswillbeavoidedorreducedtoanacceptablelevelresultinginnegligibleresidualeffectsthroughaprogrammeofmitigationdescribedinaWrittenSchemeofInvestigation,(suchaspreservationbyrecordandarchaeologicalwatchingbrief)assetoutintheCoCP.

5.34 Overall,itisbelievedthatthesetargetedarchaeologicalinvestigationscouldincreasethearchaeologicalunderstandingofthearea.

Noise and Vibration

5.35 NoiseandvibrationfromtheNLEcanarisefromthefollowingsources:

■ Construction(includingdemolition,excavation,constructionplantincludingtunnelboringandlorrymovements);

■ Operationaltrainmovements(groundbornenoiseandvibration);and

■ Operationalventshaftandstationemissions(surfacenoise).

5.36 Noiseandvibrationsurveyswereundertakentoestablishthebaselineconditionsatthereceptorswhichareclosesttopotentialnoisesourcesalongtheproposedroute.

5.37 Withoutmitigation,constructionnoisefromthesurfacesitesispredictedtoproducesignificanteffectsforreceptorsclosetotheconstructionsites.Mitigationmeasureshavebeenidentifiedthatcouldbeusedtoreduceconstructionnoiselevelsasmuchaspossible.

5.38 Theeffectsofconstructionvibrationarenotpredictedtobesignificant.

5.39 Thesurfacedemolitionandconstructionprogrammeandactivitieswillbediscussedwiththerelevantlocalauthoritiesonceacontractorhasbeenappointed.SuchdetailsforallsurfacedemolitionandconstructionactivitieswillbesetoutinSection61(oftheControlofPollutionAct1974)application(s)submittedbytheappointedcontractorforconsenttoconductconstructionactivitiesinadvanceoftheiroccurrence.

5.40 TheuseoftheSection61processwillensure,wherepracticable,thatworksarecarriedoutonsitetostaywithinpredeterminednoiselimits.


5.41 Theremaybeexceptionalcircumstanceswhereitisnotpracticabletostaywithintheconstructionnoisethresholds.Insuchcases,themeasuressetoutwithintheNLEConstructionNoiseandVibrationMitigationSchemewouldbeimplementedtoprovidefurthermitigation.

5.42 Thesemeasureswillensurethatnoisefromsurfaceconstructionactivitieswillnotbesignificant.

5.43 Groundbornenoiseduetotunnelboringactivitiesispredictedtocauseanadverseeffect.However,itisdifficulttoprovidemitigationforsuchactivitiesandtheexpecteddurationswillbeshort(nomorethanafewdays).

Operation

5.44 Withoutmitigation,theoperationalgroundbornenoiselevelshavebeenpredictedtoresultinadverseeffectsthat

couldcausedisturbancetopropertiesabovetheroute(asshowninFigure11).However,toreducetheeffectsofthegroundbornenoise,ithasbeenassessedthattheuseofavibrationisolatingtrackformwouldprovideappropriatelevelsofnoisereductions.ThismethodwaspreviouslyusedontheJubileeLineExtensionandispredictedtoreducethegroundbornenoiselevelssuchthattheeffectwillbeneglible,consistentwithothermodernmetrosystems.Thisalsohastheeffectofreducingtheoperationalgroundbornevibrationeffectstonegligibleforboththedayandnight.

5.45 Operationalnoisefromfixedinstallationsatstationsandventilationshaftshasbeenpredictedtobenegligiblewhenthetunnelventilationfansmeetaspecificdesigncriteria.

Figure11:Potentialforgroundbornenoiseeffects


Air Quality

5.46 Impactstoairqualitycanoccurthroughthereleaseofdust(includingparticulatesknownasPM10andPM2.5)andtheemissionsfromconstructionplantandlorrymovementsduringdemolitionandconstruction.Duringoperation,particulatescouldalsobereleasedthroughtheventilationshafts.

5.47 ThecurrentairqualitybaselineshowsthateachoftheboroughsiswithinanAirQualityManagementArea(AQMA)duetoexistingconcentrationsofparticulatesandnitrogendioxide(NO2).

5.48 Throughtheapplicationofon-sitemanagementpracticesidentifiedintheCoCP,effectsduringconstructionwillbeminimisedtominoradversefordustdepositionratesandnegligibleforPM10. Roadtrafficemissionsfromconstructiontrafficarealsopredictedtohaveanegligibleeffectonlocalairquality.

5.49 Forthemajorityofthetime,emissionsfromtheNLEventilationshaftswilloccurpassively,astheventilationstrategyisdesignedtooperatewithoutmechanicalassistanceundernormaloperatingprocedures.Undercertaincircumstances(e.g.duringtestingofthefansorwhentemperaturesreachcertainlevels),fanswillbeoperatedinordertopurgeairfromthetunnels.Tolimitpotentialimpactsfromventshaftemissions,thedesignwillincorporatemeasurestomanageemissions(suchasorientationandfluesize)sothatanyeffectsonlocalairqualityarereducedtoanegligiblelevel.Furthermore,theairqualityoftheUndergroundismonitoredregularlyinordertoensurethatnohazardouslevelsofgasesandparticulatesoccur.

Electromagnetic Compatibility

5.50 Standardguidanceandsitespecificcontrolplanswillbeemployedtoensurethattherearenoadverseeffectsonsourcesofradiofrequencysuchasmobilecommunication

masts,ortohumanhealthfromtheintroductionofelectromagneticsources.

Surface Water Resources and Flood Risk

5.51 TheonlysurfacewatercoursethatcouldpotentiallybeaffectedbytheNLEistheRiverThamesandthroughtheapplicationofon-sitemanagementpracticesidentifiedintheCoCP,effectsduringconstructionwillbeminimisedtoanegligiblelevel.

5.52 AWaterFrameworkDirectivepreliminaryassessmentwasundertakenandconcludedthat,duetothelimitedintrusiveworksassociatedwithdredgingandjettyworksatBPS,thecurrent‘Moderate’ecologicalpotentialclassificationwillnotbeimpacted.

5.53 AnypollutionarisingfromtheoperationoftheNLE,suchasleaks/spillagesoffertilisersandpesticideswithinlandscapedareas,orcontaminationfromin-situmaterialsisalsopredictedtohaveanegligibleeffect.

5.54 Theriskoftidal,river,groundwater,surfacewaterandoverlandflowfloodingisconsideredtobelow.TherunofffromtheNLEsiteswilldrainintotheThamesWaterUtilitiesLimited(TWUL)publicsewersystem.AreductiontothefloodriskintheTWULcombinedsewerswillbeachievedbyreducingtherateandvolumeofstormwaterdischargeenteringthesystem.

Land Quality and Groundwater

5.55 Thisassessmentconsidersthegroundconditionsandgeologyonwhichtheprojectwillimpactandtheresultanteffectsthiscouldcauseintermsofgroundmovement(settlement)andeffectsupongroundwaterandsubsequentusers.TheassessmentalsoconsideredthepotentialpresenceofunexplodedordnancethatcouldbepresentfromtheSecondWorldWar.

5.56 CurrentUKguidanceontheassessmentoflandcontaminationandassociatedriskstobothhumanhealthandtheenvironment


Figure12:OperationalfunctionoftheKenningtonGreenshaftandheadhouse

Figure13:VisualisationofKenningtonGreenheadhouseandopenspaceimprovements(lookingnorth-westfromKenningtonRoad)


Figure14:OperationalfunctionoftheKenningtonParkshaftandheadhouse

Figure15:VisualisationofKenningtonParkheadhouseandcommunityfacility(lookingwestfromKenningtonParkPlace)


advocatestheuseofaparticularriskassessment,knownasaconceptualsitemodel(CSM).ACSMapproachhasbeenusedtoinformtheassessmentundertaken,theelementsofwhichcanbeexplainedasfollows:

■ Sourcesmayincludecontaminationfromexistingandhistoricalsiteusesorcontaminationintroducedbytheconstructionworkssuchasfromvehiclesorspillages.Thepresenceofcontaminantsdoesnotautomaticallyimplythatacontaminationproblemexists,sincethecontaminationmustthenhavea‘pathway’toareceptor-asdescribedbelow;

■ Pathwayscouldbeopeneduporintroducedbytheworks,forexampletheconstructionofshaftsandtunnelsoropeninguppathwaysthroughpilingintothegroundtosupportstructuresandworks;and

■ Receptorsconsideredincludeworkersinvolvedinconstruction,belowsurfacegroundwater,featuresconnectedtogroundwatersuchastheRiverThamesanduserswhomayabstractfromthegroundwaterusingboreholes,includingTWULwhoabstractdrinkingwater.

5.57 Thenatureofunderlyinggeology(LondonClay)anddepthofworksmeansthatthiswillactasanaturalbarriertomovementofpollutioninsomeareasoftheworks.TheNLEhasasubstantialnumberofembeddedmeasuresfortheprotectionofgroundwaterresourcesincorporatedintotheCoCP.Theseinclude,butarenotlimitedto,theadoptionofappropriatepilingtechniqueswhichmaybeneededtopreventopeningaconnectionpathwayforpollutiontoreachgroundwater.Whererequired,remediationofexistinglocalisedcontaminatedhotspotsasacomponentofconstructionworkscouldberequired,includingriskassessments.AssetoutintheCoCP,suitablepersonalprotectiveequipmentPPEandsitecontrolswill

beinplaceduringconstruction,withventilationanddustsuppressionplansimplementedasrequired.Ground-gasmonitoringwillbeundertaken,andsuitableunexplodedordinanceriskassessmentandmanagementplanswillbeincorporatedtoemergencyprocedures.Anycontaminationidentifiedwillbetransportedoffsite,eithertobetreated,ordisposedofatasuitablylicensedlandfill.

5.58 GroundsettlementasaresultoftheNLEhasthepotentialtoaffectarangeofbuildingsdirectlyaboveandalongtherouteoftheNLE.However,theextentofeffectswilldependontheconstructionmethodology,thedistanceofabovegroundbuildingsfromtheexcavationworksandspecificgroundconditionsencounteredunderthevarioussensitivereceptors.Mitigationmeasureswillbeimplementedtoreduceanygroundsettlementeffectsasfarasreasonablypracticable.ItisanticipatedthatgroundsettlementwilllargelybeavoidedorreducedthroughtheuseofTBMsandalsothroughinjectionofasubstanceknownasgrout,whichstabilisesthegroundaffectedbytunnellingworks.Furthermitigationmeasuresmaybeneeded,includingstrengtheningthestructureofaffectedbuildings,installationofaphysicalbarrierbetweenthefoundationoftheaffectedbuildingandtunneltoreducegroundmovementanddiversionorreplacementoflocallyexistingservices.

5.59 Withthesuggestedconstructionmitigationmeasuresapplied,andfollowingbestpracticeguidance,theresidualeffectsfromconstructionduetocontaminatedgroundorgroundwater,orgroundsettlementareconsideredtobenegligible.

5.60 Nocontaminationspecificmitigationmeasures(exceptpotentialmonitoring)areconsiderednecessaryduringtheoperationalphaseoftheNLEbeyondregularinspectionandmaintenanceofinfrastructuretoensurethatnopathwaystounderlyingsoil,groundwaterorsurfacewateroccurasaresultofdisrepair.


Ecology

5.61 Theecologicalinterestateachoftheconstructionsiteswasestablishedthroughbaselinedeskstudiesandfieldsurveys.Thisestablishedthefollowing:

■ TheBatterseastationsitehaslowecologicalvalue,consistingmainlyofhardstandinganddisturbedbareground.Theconveyorbeltcarryingspoilfromthestationboxtothejettywillbeelevatedacrosssimilarsiteconditions.ThesiteisconsideredtohavelimitedforaginghabitatforBlackRedstartsorbats;

■ ThejettyworkswillrequiresomedredgingintheRiverThames,whichisdesignatedasaSiteofMetropolitanImportanceforNatureConservation.Nodirectlossofinter-tidalormudflathabitatisanticipated,althoughtheremaybesometemporarylossofsub-tidalhabitat.Thisisexpectedtorevertbacktoitsnaturalstateoncethebargemovementscease.Effectsonfishareconsideredtobeminor;

■ TheNineElmsstationsiteislargelycomprisedofbuildingsandhardstandingareaswithafewscatteredtreesthroughoutthesite,andisconsideredtobeoflowecologicalvalue;

■ AlthoughKenningtonParkisdesignatedasaSiteofLocalImportanceforNatureConservation,theworksitewilloccupyanarealargelycomprisinglowqualityamenitygrasslandconsideredtohavelowecologicalvalue.Theworksitewill,however,requirethelossofsometrees,whichdoprovidesomelocalbiodiversityvalue;

■ KenningtonParkisconsideredtobelocallyimportantforforagingandcommutingbats,whichcouldpotentiallybedisturbedbyanynight-timeworksduringthebatactivityseason.However,anysuchdisturbancewouldbetemporaryandwouldnotleadtotheseveranceofanycommutingroute,andwouldnotaffecttheabilityofthelocalbat

populationtocommuteandforagewithinthelocalarea;

■ TheKenningtonGreenworksitecomprisesanareaoflowqualityamenitygrasslandconsideredtohavelowecologicalvalue.Theworkswill,however,requiresomelossoftrees,whichdoprovidesomelocalbiodiversityvalue;and

■ Thetemporaryshaftsitesareconsideredtohavenegligibleecologicalvalue.

5.62 TheCoCPincludescontrolmeasuresthatmustbeadheredtoduringconstructiontosafeguardhabitatsfromdamageanddegradationandtoavoidkilling,injuryordisturbancetoprotectedspecies.Togetherthesemeasureswillensurethattheeffectondesignatedsitesandhabitatsandprotectedspeciesisnegligible.

5.63 InaccordancewithLondonUnderground’sBiodiversityActionPlan,TfLwillseeknotonlytoreplacehabitatslostduringconstruction,butwillseektoenhancethebiodiversityvalueoftheworksites.ThiswillincludetheincorporationofagreenroofonthenewheadhouseandcommunitybuildingatKenningtonPark.

5.64 TheplantingandlandscapingstrategyforKenningtonGreenandKenningtonParkisshowninFigure16c-d.

Townscape and Visual Amenity

5.65 ThisassessmentconsiderstheimpactsoftheconstructionandoperationoftheNLEonthecharacteroftheareasurroundingeachworksiteandonpeople’sviews.

5.66 Thestudyareaischaracterisedbydenseurbandevelopment,crossedbyroadsandrailwaylinesandwiththeRiverThamestothenorth.Landuseistypicallyresidentialwithpocketsofcommercial,industrial,retailandopenspace.Thescaleofdevelopmentismodestwithmostbuildingsbetweentwoandsixstoreysinheight.Thearea’spastisreflectedinthehistoricpatternofstreetsleadingnorthtowardscentralLondon.


Manyoftheolderpartsaredesignatedasconservationareas.Viewswithinthestudyareaarelargelycontainedbybuiltdevelopmentwithlonger,linearviewsavailablealongroadsandacrosstheRiverThames.

Construction

5.67 Adverseeffectswillmainlyoccurduringconstruction,althoughthesewouldbetemporary.Itwillbenecessarytoremoveexistinghardsurfacing,vegetationandbuildingswithintheworksitestoenabletheconstructionoftheNLE.ConstructionwillbecarriedoutinaccordancewiththeCoCPandadditionalmeasureswillbeconsideredatthedetaileddesignstagetoreducetheeffectsfurther.

Operation

Temporary Construction Shafts

5.68 Oncompletionoftheworks,theroadsurfaceandpavementsatRadcotStreetandHamsworthStreetwillberestoredandnewtreesplantedtoreplacethosethatmayberemovedduringconstruction.Thecharacterofthetownscapeandviewswillberestoredandtheeffectwillbeneutral.

Kennington Park

5.69 ThenorthernboundaryoftheparkwillberestoredfollowingconstructionwithanavenueofLondonPlanetreessetwithinmeadowandamenitygrassandnewmetalrailingstotheboundarywithKenningtonParkPlace.Thenewheadhouseandcommunitybuildingswillbelocatedinthenorth-easterncornerofKenningtonPark,replacingtheexistingKenningtonParkLodgeandgarden.AnewphysicalconnectionwillbeformedbetweenthenewbuildingsandKenningtonParktothesouth.Thebuildingswillbecontemporaryindesignandlinkedbyapergola.Thegardenwillbeplantedwitharangeoftrees,ornamentalshrubsandclimbingplantstointegratethebuildings

withtheirsetting.Astheplantsmature,theoveralleffectwillbetoenhancethetownscapeandviews.Overall,therewillbealocalisedimprovementinthequalityofthetownscapeandviews.

Kennington Green

5.70 Anewheadhousebuilding,constructedinbrick,willcontributetotheenclosureofKenningtonGreenandwillbesimilarinproportiontothesurroundingGeorgianhouses.

5.71 TherestorationofKenningtonGreenwillresultinasignificantenhancementtothetownscape.AhighqualitypublicrealmschemewillsurroundtheGreen,whichwillbeplantedwithnewtreesandshrubs,enhancingthesettingofthesurroundinglistedbuildings.Therewillbesignificantimprovementsinthetownscapeandinthemajorityofviews.

Nine Elms Station

5.72 ThestationportalbuildingwillformafocusofactivityandviewsatthejunctionofPascalStreetandWandsworthRoad,replacingaclutteredandblandtownscape.ExtensiveimprovementstothepublicrealmalongPascalStreet,includinganavenueofstreettrees,willfurtherenhancethetownscape.ThiswillalsoprovideanewphysicalconnectionwiththeneighbouringVNEBareaviaalinkbeneaththerailwayviaduct.Theoveralleffectonthecharacterofthetownscapeandviewswillbebeneficial.

Battersea Station

5.73 AnewstationentranceportalwillbelocatedadjacenttoBatterseaParkRoad.Itwillbesetwithinawide,highqualitypublicrealmlinedwithtreesandextendingalongthestreet.Thestationwillformafocusofactivityanditsslightelevatedpositionwillmakeitprominentinlocalviews.Theremovaloftheexistinghoardingwillopen


upviewsoftheGradeII*listedformerBPSandindustrialbuildings.Overall,therewillbeasignificantimprovementinthequalityofthetownscapeandviewslocally.

Climate Change Adaptation and Mitigation

5.74 RisinginternationalandnationalaspirationsonclimatechangeadaptationandmitigationhasledtothestrengtheningofnationalplanningpoliciesandbuildingcontrolprocessesthatcontributetotheUKGovernment’slong-termcommitmenttosupportsustainableandresilientdevelopment.

Climate Change Adaptation

5.75 ThisdescribeshowclimatechangehasandwillpotentiallymanifestitselfinLondon,theproblemsitcancausetothepublictransportnetwork,andhowtheNLEcanadaptbyidentifyingrisks,solutionsandopportunitiesduringtheplanning,design,constructionandoperationalphasesoftheproject.

5.76 Theplanning,design,operationandmaintenanceoftheNLEprovidesnumerousopportunitiestobothexploitextremeweatherconditions(e.g.rainwaterharvesting)andadapttothem.TherearemanyexamplesofwhereadaptationhasalreadybeenincorporatedintoTfLoperationalpolicy,andmanyexamplesofwhereadaptationhasbeenincorporatedintothedesignoftheaboveandbelowgroundelementsoftheNLE.

Climate Change Mitigation

5.77 ThisinvolvesreportingtheestimatedcarbonemissionsthatwillbeproducedbytheNLE,bothduringconstructionandthroughoutoperationandinvestigatingwaystominimisetheseemissions.

5.78 Forexample,rivertransportforexcavatedmaterialswillbeusedwherepossibleto

reduceroadtransport.Assuming70%ofmaterialsareremovedbybarge,thisreducesthecarbonfootprintofexcavatedmaterialsby63%comparedtousingroadtransportonly.

5.79 Considerationwillbegiventotheselectionofmaterialsused,forexampleusingcementcontainingahigherrecycledmaterialscontentandthereforelowerembodiedcarbon.

5.80 Thedifferencebetweenthe‘WithoutNLE’and‘WithNLE’operationalscenariosshowsanoverallincreaseincarbonemissions.Thisisduetotheoperationalscenarioaccountingforagreaterpopulationandnumberofjobsinthearea.TheincreaseindevelopmentwillsupportthebuildingoftheNLE,butalsohasthenegativeeffectofpotentiallycreatingmorecarusersinthearea.Caruseisadriveroftheoperationalfootprintastheemissionsfactorperkilometreismuchhigherthanthatofpublictransport.However,theassessmentshowsthatashiftawayfrombusandrailusetowardsuseofthetubenetwork(includingtheNLE).Thisshiftresultsinalowercarbon-intensitymethodofpublictransport,astheemissionsassociatedwiththetubeareapproximately19%lowerthanbustransport.Theemissionsfrombusandrailusedecreaseintheoperationalscenariocomparedtothebaseline,despitetherebeinggreaterdevelopmentinthearea.ThisindicatesthattheNLEwouldencouragemoresustainablemodesofpublictransportuseinthearea.

5.81 Theoperationalscenariohaspotentialforfurthermitigationofupto24%emissionsreductionfromenergyefficiencymeasuresandpotentialforrenewableenergygeneration.


Figure16:Illustrativepublicrealmandlandscapeproposalsata)BatterseaStation,b)NineElmsStation,c)KenningtonGreenandd)KenningtonPark

Figure16a

Figure16b


Figure16c


Figure16d


In-Combination Effects

5.82 In-combinationeffectscanoccurwherethereismorethanoneimpactonaparticularresourceorreceptor,forexample,thecombinedeffectsofconstructionnoiseanddustonaresidentialorecologicalreceptor.

5.83 Althoughthereisthepotentialforsuchin-combinationeffectstooccurthroughouttheconstructionoftheNLE,thesewillbetemporaryinnatureduetothetransientnatureofworks.Inaddition,theseeffectswillbereducedasfarasreasonablypracticableviatheimplementationofmitigationmeasuresasdetailedwithintheCoCP.

5.84 ForthecompletedandoperationalNLE,potentialimpactinteractionsarepredominantlybeneficial.Thepublictransportnetworkwillexperienceamajorbeneficialeffect.Thiswillalsoprovidebothdirectandindirectminorbeneficialeffectsforpedestrianandcyclenetworksafetyandamenity,neighbouringcommercialpropertiesandlocalbusiness.Localresidents,andamenityareas,willexperienceminorbeneficialeffectsasaresultofrestorationplans,whichwillimprovethevalueoflandscapeandcommunityamenityfeatures.

Residual Effects and Conclusions

5.85 TheproposedNLEistheresultofanextensiveexaminationofalternativetransportsolutions,alternativeroutesandalternativelocationsanddesignsforthestationsandshafts.Consultationwithstakeholders(suchastheLondonboroughsofLambeth,SouthwarkandWandsworth,statutoryconsultees,andlandowners)andthepublichasbeenimportantinthisprocess.ThisconsiderationofalternativeshasbeeninformedbytheEIAprocessandhasalloweddesignchoices(andmethodsofconstruction)tobemadewithanunderstandingoftheenvironmental

effects.Thishasresultedincertainpotentialadverseeffectsbeingavoidedorminimised.

5.86 ItisacknowledgedthatsomeadverseeffectswillbeexperiencedduringthedemolitionandconstructionphaseoftheNLE,whichwouldbeexpectedforaprojectofthisscale.However,theadverseeffectsanticipatedtoarisewillbemanagedthroughtheimplementationofmitigationmeasuresthroughthedesignoftheNLEandduringdemolition/constructionandoperation.Assumingtheimplementationofthismitigation,mosteffects(pre-mitigation)havebeenreducedtoresidualeffectsofnegligibleorminorsignificance.

5.87 TheprimaryaimoftheNLEistoencourageeconomicgrowthinLondonandthewiderUKeconomybyfacilitatingthesustainableregenerationanddevelopmentoftheVNEBOA.ThisisconsistentwithanumberofobjectivessetoutintheNationalPlanningPolicyFramework,theLondonPlan,theVNEBOAPlanningFrameworkandboroughplanningpolicies.Inparticular,theNLEisintendedtomeetanumberofgoalsfortransportinLondonsetoutintheMTS.

5.88 Intermsofsustainableregeneration,theNLEwillhavealongterm,majorbeneficialeffect.

6 . 0 T h e N e x t S t e p s a n d H o w t o G e t M o r e I n f o r m a t i o n30 N o n Te c h n i c a l S u m m a r y f o r t h e N o r t h e r n L i n e E x t e n s i o n

6. THE NEXT STEPS AND HOW TO GET MORE INFORMATION

6.1 FollowingthesubmissiontotheSecretaryofStateforTransporton30April2013oftheapplicationforaTransportandWorksActOrder,whichincludesarequestforadirectionfordeemedplanningpermission,acopyoftheapplication,andofallplansandotherdocumentssubmittedwithit,maybeinspectedfreeofchargefromTuesday,30April2013untilTuesday,18June2013(excludingMonday,6May2013andMonday,27May2013whichareBankHolidays)byvisitinganyofthefollowinglocationsduringnormalopeninghours-

(1) Durning Library,167KenningtonLane,LondonSE114HF

(2) Southwark Local History Library,JohnHarvardLibrary,211BoroughHighStreet,LondonSE11JA

(3) Lambeth Council,PhoenixHouse,10WandsworthRoad,LondonSW82LL

(4) Lambeth Council,LambethTownHall,BrixtonHill,LondonSW21RW

(5) South Lambeth Library,180SouthLambethRoad,LondonSW81QP

(6) Wandsworth Council,CustomerServicesCentre,GroundFloor,TownHallExtension,WandsworthHighStreet,LondonSW182PU

(7) Battersea Park Library,309BatterseaParkRoad,LondonSW114NF

(8) Bircham Dyson Bell LLP,50Broadway,LondonSW1H0BL

6.2 DetailsofopeninghoursfortheabovelocationsandfurtherinformationabouttheproposalscanbeobtainedbycontactingtheNLEHelpDesk:

■ onfreephone08081684207;or

■ [email protected].

UntilthentheHelpDeskwillbeopenMondaystoFridays(exceptbankholidays)from0800to1800andanycallsore-mailsreceivedoutsideofthesedaysandtimeswillberespondedtobytheendofthenextworkingday.Pleasenotethatthise-mailaddressshouldnotbeusedtomakerepresentationseitherfororagainsttheproposals.

6.3 Acopyoftheapplication,andofallplansandotherdocumentssubmittedwithit,maybeobtainedfromBirchamDysonBell,50Broadway,LondonSW1H0BL(attentionPamThompsonfromTuesday,30April2013untilTuesday,18June2013(exceptbankholidays).Achargemaybepayable):

■ Telephone:02077833437;

■ E-mail:[email protected]

6.4 CopiesofthedocumentsandanumberoffactsheetsabouttheapplicationfortheOrderandtheproposalsgenerallycanalsobeviewedanddownloadedfreefromtheprojectwebsiteat:www.tfl.gov.uk/nle.

6.5 Anyobjectionsto,orotherrepresentationsabout,theproposalsintheapplicationshouldbesentonorbefore18June2013to:

■ SecretaryofStateforTransport,c/oTransportandWorksActOrdersUnit,GeneralCounsel’sOffice,DepartmentforTransport,Zone1/18,GreatMinsterHouse,33HorseferryRoad,LondonSW1P 4DR

■ E-mail: [email protected]

6.6 AnobjectionorrepresentationMUSTbereceivedbytheSecretaryofStateonorbefore18June2013inthecorrectform(detailsofwhichareonthewebsite).

6 . 0 T h e N e x t S t e p s a n d H o w t o G e t M o r e I n f o r m a t i o n N o n Te c h n i c a l S u m m a r y f o r t h e N o r t h e r n L i n e E x t e n s i o n 31

6.7 TheSecretaryofStatewillthenconsiderwhetherapublicinquiryshouldbeheld.Ifitisitwillprobablytakeplaceinlate2013.Thiswouldmeanthatitislikelythatadecisionwouldbemadebyautumn2014.

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