p2 changes pip

8/3/2019 P2 Changes PIP

1/7

Project information paper

After phase one consultation, weanalysed all the feedback that wereceived during the consultationperiod and interim engagementevents. We considered thisinformation alongside thedevelopments in engineering designand any new information.

This information paper explains howour proposed scheme has changedcompared to that presented at phaseone consultation and why. This isa high-level overview of the changes,for more detailed informationplease see our Site information

papers and Phase two schemedevelopment report.

Main tunnel sites andtunnelling strategyWe require sites to build the main

tunnel at:

each end of the main tunnel inwest and east London

suitable intervals along the route ofthe main tunnel

in locations where the type of

geology that the main tunnel goesthrough changes.

Thetwoguresoverleafshowour preferred sites related to ourtunnelling strategy for phaseone consultation and phasetwo consultation.

Changes

We have reviewed our preferred sites and tunnelling strategy to comeup with a revised and rened scheme for phase two consultation.


2/7

Changes

Phase one consultation preferred tunnelling strategy

Phase two consultation preferred tunnelling strategy

CITY OF WESTMINSTERKENSINGTON

& CHELSEA

CITY OF LONDON

TOWER HAMLETS

NEWHAM

GREENWICHLEWISHAMLAMBETH SOUTHWARK

EALING HAMMERSMITH

& FULHAM

WANDSWORTH

RICHMOND

UPON

THAMES

HOUNSLOW

1

2

4

3

5

6

7

8

Drive H

Drive I

Drive K

Drive J

Drive L

Acton Storm Tanks

Hammersmith Pumping Station

Barn Elms

Bell Lane Creek

King Georges Park

Tideway Walk

Kings Stairs Gardens

Druid Street

Greenwich Pumping Station

Abbey Mills Pumping Station

Main tunnel

Connection tunnel

Lee Tunnel (under construction)

Acton Storm Tanks

Dormay Street

King Georges Park

Carnwath Road Riverside

Kirtling Street

Chambers Wharf

Greenwich Pumping Station

Abbey Mills Pumping Station

Main tunnel

Connection tunnel

Lee Tunnel (under construction)

2

2

3

3

4

4

5

5

6

6

7

7

8

8

9

1

1

10

CITY OF WESTMINSTERKENSINGTON

& CHELSEA

CITY OF LONDON

TOWER HAMLETS

NEWHAM

GREENWICHLEWISHAMLAMBETH SOUTHWARK

EALING HAMMERSMITH

& FULHAM

WANDSWORTH

RICHMOND

UPON

THAMES

HOUNSLOW

1

2

3

4

5

6

7

9

10

8

Drive B

Drive A

Drive C

Drive D

Drive E

Drive F

Drive G


3/7

Changes

Main tunnel sitesAt phase one consultation the construction of our

preferred main tunnel started in the west at Barn Elmsdrives A and B). The central section was to be built from

Tideway Walk (drive C) and the eastern section from

Abbey Mills Pumping Station to Kings Stairs GardensdriveD).TheowswouldthenbetransferredviatheLee

Tunnel (which is already under construction) to BecktonSewage Treatment Works.

At phase two consultation, we are proposing that the

main tunnel extends to Acton Storm Tanks, where we alsoneed to intercept a CSO (drive H). The main tunnel would

henfollowthepreviouspreferredroutetonishatAbbeyMills. The sites at both ends of the main tunnel would onlybe used to take the tunnel boring machines (TBMs) out of

he ground and are known as reception sites.

Barn Elms/Carnwath Road RiversideAt phase one consultation, Barn Elms was our preferredsite to construct the main tunnel and to intercept the

existing local CSO (West Putney Storm Relief CSO). Weproposed to drive a short section of the main tunnel to

Hammersmith Pumping Station site (drive A) and then

drive the main tunnel towards Tideway Walk (drive B).

After phase one consultation we reviewed the size of our

main tunnel sites in areas of clay geology and we nowlonger need as much space as we previously thought.

Because of this we have re-assessed potential sites in thewest. At phase two consultation, we propose to use

Carnwath Road Riverside to drive the main tunnel to

Acton Storm Tanks (drive H).

Carnwath Road Riverside is now our preferred site. Themain reasons are:

itisabrowneldsite

the existing wharves and the width of the River

Thames at this point would allow the use of larger

barges to remove material excavated duringconstruction of the main tunnel

therewouldbemuchlessconictwiththerecreationaluses of the River Thames than at Barn Elms.

For more information on the selection of this site please

see the Carnwath Road Riverside Site information paper.

We would still need a site at Barn Elms to intercept the

West Putney Storm Relief CSO located there. At B arn Elmsthiswillsignicantlyreducetheconstructionareaand

time on site.

Tideway Walk/Kirtling StreetAt phase one consultation, Tideway Walk was ourpreferred site to construct the main tunnel and to

intercept the two local CSOs (Heathwall Pumping StationCSO and South West Storm Relief CSO). This site would

receive the main tunnel from Barn Elms (drive B) and drive

the main tunnel to Kings Stairs Gardens (drive C). Sincethen, the site has been granted planning permission andwork has started on a new residential development. This

means that the site is no longer available to the project.

At phase two consultation, we propose to use Kirtling

Street, which is located to the west of the Tideway Walksite. We propose to use Kirtling Street as a double drive

site (drives I and J). This means we would drive one sectionof the main tunnel westward to Carnwath Road (drive I)

and drive another section of the tunnel eastward toChambers Wharf (drive J).

Kirtling Street is now our preferred site to tunnel both eastandwest(atthesametime)becauseitisbrowneldland

in a mainly industrial area. It also has more space toaccommodate the tunnelling activities associated with a

main tunnel double drive site. By including the land at

Cringle Street (next to the Kirlting Street site) we there isalso more river frontage, which would provide better

arrangements for jetties and barges.

As Kirtling Street is not located next to the two CSOs we

also need to intercept, we propose using another site atthe Heathwall Pumping Station including the use of

Middle Wharf.

For more information on the selection of this site pleasesee the Kirtling Street and Heathwall Pumping Station Siteinformation papers.

Phase two preferred site Carnwath Road Riverside

Phase one preferred site Barn Elms

Local authorityboundary

N

Wandsw

orthBridge

Putn

eyBridg

e

Barn Elms and Carnwath Road Riverside sites

N

Phase two preferred site Kirtling Street and HeathwallPumping Station

Phase one preferred site Tideway Walk

Local authority boundary

Nin

eEl

msL

ane

A320

5

Kir

tlin

gS

treet

Tideway Walk and Kirtling Street sites


4/7

Changes

Combinedseweroverow(CSO)sitesandconnection tunnelsAt phase one consultation we presented 20 preferred CSO

sites, three of them combined with main tunnel sites. Atphase two consultation we propose 17 preferred CSO sites.

Further technical work has allowed us to drop threeCSO sites.

The following explains what we proposed at phase one

and phase two consultation, and provides a snapshot of

the potential consequences of the changes.

Acton Storm Tanks

We still intend to use this site to intercept the Acton StormRelief CSO. At phase one consultation, we proposed to

drive a connection tunnel to t he site from Hammersmith

Pumping Station (drive E). We are now proposing to drivethe main tunnel from Carnwath Road Riverside to the site

(drive H), which will involved a slightly larger shaft andlonger construction period.

Phase oneconsultation

Phase twoconsultation

Consequences

Intercept the CSOand receive a smallTBM.

Intercept theCSO and receivethe main tunnelTBM.

Slightly largerconstruction arearequired and alonger constructionperiod.

Hammersmith Pumping StationAt phase one consultation, we proposed to use the site todrive a connection tunnel to t he Acton Storm Tanks site

(drive E) and to intercept the Hammersmith PumpingStation CSO. We also proposed to use this site to receive

the main tunnel from Barn Elms (drive A).

At phase two consultation we propose to only use this site

to intercept the CSO as we now propose to drive the maintunnel from Carnwath Road Riverside to Acton Storm

Tanks (drive H).



Consequences

Intercept the CSO,drive a connectiontunnel, and receivethe main tunnelTBM.

Intercept theCSO.

Reducedconstruction areaand time on site.

Barn ElmsAt phase one consultation we proposed to use the site todrive the main tunnel up to the Hammersmith Pumping

Station site and to then drive the main tunnel to theTideway Walk site in Battersea (drives A and B).

Sincephaseoneconsultation,wehaveidentied

Carnwath Road Riverside as our preferred alternative site

over Barn Elms for the construction of the main tunnel.However, we still require a site at Barn Elms to intercept

the West Putney Storm Relief CSO located there.



Consequences

Intercept the CSO,drive the main tunnelup to HammersmithPumping Station andthen drive the maintunnel to TidewayWalk in Battersea.

Intercept theCSO.

Signicantlyreducedconstruction areaand time on site.

Putney Bridge ForeshoreThis remains our preferred site at phase two consultation,

to intercept the CSO located underneath Putney Bridge.We have listened to stakeholders and made improvements

to the construction layout to help reduce local impacts.

Kings Stairs Gardens/Chambers Wharfn the east, we previously proposed to drive the main

unnel from Abbey Mills Pumping Station to Kings StairsGardens (drive D). Two connection tunnels would also be

driven from Kings Stairs Gardens, one to GreenwichPumping Station (drive F) and one to Druid Street

drive G).

Sincephaseone,wehaveidentiedapotentialalternative

ite at Chambers Wharf, to the west of the Kings StairsGardens site. This site was not previously available to us as

he site had planning permission and site clearance hadtarted for a residential development.

Since then, we have purchased the site in conjunction with

St James (a part of the Berkeley Group). This means thatwe have secured the ability to use it, should it be deemed

appropriate to do so following public consultation.

As the site has much better river access than we wouldhave had at Abbey Mills Pumping Station, we are now

proposing to drive the main tunnel from Chambers Whar fto Abbey Mills Pumping Station (drive K). Chambers Wharf

would also receive the connection tunnel from Greenwich

Pumping Station (drive L).

N

Phase two preferred site Chambers Wharf


Phase one preferred site Kings Stairs Gardens

JamaicaRo

ad

Bevin

gto

nSt

reet

Paradise

Street

Kings Stairs Gardens and Chambers Wharf sites


5/7

Changes

Bell Lane Creek/Dormay StreetAt phase one consultation, we proposed to use the site to

ntercept the Frogmore Storm Relief (Bell Lane Creek) CSOand to construct a connection tunnel to the main tunnel

and connect to the Frogmore Storm Relief (BuckholdRoad) CSO.

Forphasetwoconsultation,wehaveidentiedapotentialalternative site at Dormay Street, just to the north of theBell Lane Creek site. Use of this site would mean that we

do not have to use the premises of a local business, which

would have needed to be relocated.



Consequences

Intercept the CSO atthe Bell Lane Creeksite and construct aconnection tunnel tothe Frogmore StormRelief (BuckholdRoad) CSO and themain tunnel.

Intercept the CSOat Dormay Streetand construct aconnection tunnelto the FrogmoreStorm Relief(Buckhold Road)CSO and the maintunnel.

Change of site,no overall changein constructionactivity. Localbusiness nolonger needs tobe relocated.

King Georges ParkThis remains our preferred site at phase two consultation

to intercept Frogmore Storm Relief (Buckhold Road CSO).There is no change to the connection tunnel, except it

would now come from Dormay Street instead of BellLane Creek.

Jews RowFurther technical work undertaken since phase oneconsultation has concluded that it is no longer necessary

to identify a site for the interception of these two CSOs.Thisisbecausemodicationstotheexistingsewerage

systemwillsucientlyreducethenumberofspillstotheriver, without the need to carry out any further works to

intercept the CSO.

Bridges Court Car Park/FalconbrookPumping StationAt phase one consultation we proposed to use an area ofthe Bridges Court Car Park to intercept the Falconbrook

PumpingStationCSO.Wehavenowidentiedapotential

alternative site at the Falconbrook Pumping Station itself,which is now seen as technically feasible and allows us to

make use of our own land.



Consequences

Intercept the CSOusing Bridges CourtCar Park as aworksite.

Intercept theCSO usingFalconbrookPumping Stationand somesurroundingland as aworksite.

Change of site, nooverall change inconstructionactivity.

Phase two preferred site Falconbrook Pumping Station

Phase one preferred site Bridges Court Car Park

N

YorkR

oad

Brid

gesC

ourt

CottonRow

Bridges Court Car Park and Falconbrook Pumping Station sites

N

Phase two preferred site Dormay Street

Phase one preferred site Bell Lane Creek

ArmouryW

ay

Frogmore

Dorm

ay

Stre

et

Bell Lane Creek and Dormay Street sites


6/7

Changes

Cremorne Wharf Foreshore/Cremorne Wharf DepotAt phase one consultation we proposed to use theoreshore in front of Cremorne Wharf Depot to intercept

he Lots Road Pumping Station CSO. At phase two our

preferred location to intercept the CSO is Cremorne WharfDepot, as we can access the site from Lots Road, instead

of using a part of Cremorne Gardens for this purpose.



Consequences

Use the foreshoresite at CremorneWharf to interceptthe CSO.

Use the depotsite at CremorneWharf tointercept the

CSO.

Change of site, nooverall change inconstructionactivity. No longer

need to useCremorne Gardensfor access.

Chelsea Embankment ForeshoreAt phase one consultation we proposed a foreshore site

opposite Ranelagh Gardens, which was further from theCSOasweweretryingtoavoidtheareaidentiedand

protected for Crossrail 2, the Chelsea Hackney line.Crossrail no longer consider our site to be a problem, at

phase two consultation the foreshore remains ourpreferred site, but it has been moved westward.

Albert Embankment Foreshore, VictoriaEmbankment Foreshore and BlackfriarsBridge ForeshoreThese sites have not changed and remain our preferredsites at phase two consultation to intercept their

respective CSOs.

Druid StreetAtourphaseoneconsultationweidentiedthesiteat

Druid Street to intercept the Shad Thames PumpingStation CSO. After carrying out more detailed

investigations and analysis into how the local sewersystem operates, we no longer need the site at Druid

StreetifweinsteadmakemodicationstotheexistingShad Thames Pumping Station.



Consequences

Intercept the CSO atDruid Street.

Modicationstothe existingShad ThamesPumpingStation.

Site at Druid Streetis no longerrequired.

Phase two preferred site Cremorne Wharf Depot


Phase one preferred site Cremorne Wharf Foreshore

Lots

Roa

dAshburnhamRoad

TademaRoad

Lots

Road

Cremorne Wharf Foreshore and Depot sites

King Edward Memorial Park ForeshoreAt phase one consultation we proposed to use theforeshore. Since phase one consultation, we have looked

at potential alternative sites but we believe the foreshore

location with a revised layout should remain our preferredphase two site to intercept the CSO (as the existing

sewer runs through the park) and to connect it to the

main tunnel.

Butcher RowWe have carried out detailed investigations and analysis

into how the local sewerage system operates and we havenow found we no longer need to use the site at Butcher

Row to intercept the local CSO. A temporary worksite willbe required at Bekesbourne Street to make the necessary

modicationstotheseweragesystem.

Earl Pumping StationThis site has not changed and remains our preferred siteat phase two consultation to intercept this CSO.

Borthwick Wharf Foreshore/Deptford Church StreetAtphaseoneconsultationweidentiedanareaofforeshore at Bor thwick Wharf to intercept the Deptford

StormReliefCSO.Wehavesinceidentiedapreferred

alternative site at Deptford Church Street.



Consequences

Intercept the CSOusing the foreshoreat Borthwick Wharfas a worksite.

Intercept theCSO using thesite at DeptfordChurch Street.

Change of site, nooverall change inconstructionactivity.

Norman

Road

Phase two preferred site Deptford Church Street


Phase one preferred site Borthwick Wharf Foreshore

CreekRoad

D e

p t f o r d

C h u r c h S t r e e t

BorthwickStreet

EvelynStreet

Wa

terga

teS

tree

t

Borthwick Wharf Foreshore and Deptford Church Street sites


7/7

For further information see our website: www.thamestunnelconsultation.co.ukor call us on 0800 0721 086.

Phase two consultation (Autumn 2011)

Changes

Related

documents

Project information papers

Build

Site information papers

Technical reports

Site selection

methodology

Phase two schemedevelopment report

110-ED-PNC-00

000-000049

Greenwich Pumping StationAt phase one consultation we proposed to use this site tointercept the local CSO and to receive a TBM from KingsStairs Gardens (drive F). At phase two this remains ourpreferred site to intercept the CSO, but with someadditional land at Phoenix Wharf we propose to drive aconnection tunnel to Chambers Wharf (drive L). Thisconnection tunnel also connects two other CSOs (EarlPumping Station CSO and Deptford Church Street CSO) to

the main tunnel.



Consequences

Receive a TBMfrom Kings StairsGardens andintercept the CSO.

Drive aconnection tunnelfrom the site toChambers Wharfand intercept theCSO.

Site now used todrive theconnection tunnel.

p2 changes pip

Documents