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Earl Pumping Station

Currently, untreated sewage regularly over ows into the River Thames from Londons Victorian sewerage systemvia combined sewer over ows (CSOs). The proposed Thames Tunnel would intercept these over ows through theuse of a new storage and transfer tunnel, which would link west London and Abbey Mills Pumping Station. Thesewage ow would then be transferred to Beckton Sewage Treatment Works via the Lee Tunnel. The reductionin untreated sewage entering the River Thames would bring long-term bene ts for the environment and users of the River Thames. In order to deliver the project we need a number of sites along the route and this document

identi es our current preferred site at Earl Pumping Station.

Thames Tunnel

S i t ei nf or m

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Key factsLocal authority: Lewisham CSO name: Earl Pumping Station

CSO spill volume in an average year: 540,000m (equivalent to approximately216 Olympic swimming pools)

Site type: CSO site Duration of main construction works: Approximately four years.


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We are proposing to use our existing pumping station andadjacent industrial land for this construction work and toaccommodate permanent structures required to operatethe main tunnel. The site would be used to connect theexisting local CSO, known as the Earl Pumping StationCSO, to the main tunnel via a long connection tunnel,known as the Greenwich connection tunnel.

The location of the site is shown in Figure 1A. YeomanStreet is located to the east of the site, Chilton Grove tothe north and Croft Street, to the west, beyond which isan apartment block. South of the site, along Croft Streetis a row of terraced housing as well as commercial andindustrial units.

Section 1: Introduction and site information

Related documents:

Build

This site information paper sets out our proposals atEarl Pumping Station. We have also produced projectinformation papers, which cover overarching topicsrelating to the project. Where we consider that a projectinformation paper is particularly relevant, we havehighlighted this in a related documents box. At the endof this site information paper is a list of other documents,which may be of interest and a glossary of terms.


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Introduction

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Figure 1A: Earl Pumping Station location plan

Surrey QuaysShopping Centre

Earl PumpingStation CSO

Earl PumpingStation

L o w e r R o a d

C r o

f t S t r e e t

C h i l t o

n G r o v

e

Y e o m a n S t r e e t

P l o u g h W a

y

CSO discharges into RiverThames approximately100 metres to the east

NLEWISHAM

SOUTHWARK

Local authority boundary

Draft limit of land to beacquired or used

Proposed tunnelroute centreline

Existing sewer


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How we chose this site

What we proposed at phase one consultationThrough our site selection process, we identified fivepossible shortlisted sites to intercept the Earl PumpingStation CSO. At our phase one consultation, which washeld between September 2010 and January 2011, wepresented these sites:

Foreshore (adjacent to boat yard and St. GeorgesSquare)

Car park, St. Georges Square

Boat Yard, Calypso Way

Car park, corner of Grove Street and Plough Way

Earl Pumping Station (including adjacent land).

Earl Pumping Station was identified as our preferred siteat phase one consultation.

What we are proposing at phase two consultationWe have considered the comments from phase oneconsultation, feedback from ongoing engagement andnew information; and undertaken further technical work.We still consider that Earl Pumping Station (includingadjacent land) should be our preferred site becausewe own the majority of site, it makes use of brownfieldland and although there are residential properties closeto the site, we consider that it would be possible to usemeasures to reduce any possible significant effects.

Related documents:

Q&A Consultation

Site selection


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Construction

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Section 2: Construction

Construction activitiesConstruction activities are required to intercept theCSO. To intercept the CSO, we would construct aninterception chamber. A connection culvert would linkthe interception chamber to a drop shaft (approximately49m deep) through which flows would pass into theGreenwich connection tunnel, before connecting intothe main tunnel. Figure 2A illustrates the below ground

infrastructure proposed.

Drop sha ft

Greenwi ch connection tunnel

Valve chamb er

Existing sewer

To pumping station toRiver Thames

Interceptio n chamber

Existing overf ow sewe r

Connection culvert

Figure 2A: Illustration showing typical elements of below ground infrastructure

These activities would take place within the areaindicated by the red line in Figure 1A, in four main phases,lasting approximately four years in total. The mainconstruction activities associated with these phases areset out in Table 2.1.


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Advance works

Phase 1

Site setup

Figure reference Figure 2C

Typical working hours Varies Standard

M a i n c o n s t r u c t i o n a c t i v i t i e s Utilities connected

Utilities diverted or protected

Site cleared

Site facilities and access set up

Drop shaft excavated and built

Above and below ground structures constructedMechanical and electrical equipment installed

Site restored and landscaped

Temporary site facilities removed

Table 2.1: Main activities during construction phases

Our typical working hours are expected to be:Standard: 8am-6pm weekdays, 8am-1pm Saturday*Extended standard: 6pm-10pm weekdays, 1pm-5pm SaturdaysContinuous: 24 hours a day, seven days a week**Varies: Working hours for advanced works will depend on the nature of the works and will be agreed

with the local authority

* Standard working hours would also include, subject to agreement with the local authority: a short period (up to one hour) before works start and after they have finished to allow our workers to prepare for work and check the site. equipment and machinery maintenance could also take place 1pm-5pm Saturday and 10am-4pm Sunday.

** The main activities taking place 24 hours a day are below ground or within an enclosure.


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Construction

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Phase 2

Drop shaftconstruction

Phase 3

Constructionof otherstructures

Phase 4

Completion of works and siterestoration

Figure 2C Figure 2D

Standard withoccasional extended

standardStandard Standard

Related documents:

Build

Managing construction


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Site layout and construction phasesFigures 2C and 2D show how the site might be laid out

during the construction phases, which are set out in Table2.1 and Figure 2B. These layouts have been informed bythe size of the infrastructure proposed, the constructionmethods required and the location of neighbouringbuildings and structures. They have also been developedto minimise effects on the local community andenvironment. Particular factors at this site that haveinfluenced the layout are as follows:

The drop shaft has been moved further north westwithin boundary of the site following phase oneconsultation. This means the drop shaft is further awayfrom the residential properties to the south of the site.

The construction access to this site has been redesignedfollowing phase one consultation and a one waysystem would now operate through the site. This wouldincrease safety on neighbouring highways and withinthe site by reducing the need for construction vehiclesto manoeuvre within the site.

The location of the drop shaft has taken into

consideration the proposed allocation of this site aspart of a wider mixed use strategic site in the LondonBorough of Lewishams adopted planning policies. Thepermanent layout and design of the site minimisesthe amount of land that is needed for the shaft andmaintenance area, allowing as much of the site aspossible to be developed in accordance with adoptedplanning policies.

The site layouts are indicative only, and the contractormay arrange the site in a different way, depending onthe chosen construction methods, provided that anyenvironmental effects are appropriately managed, andthat the main construction activities are undertakenwithin the red line shown in Figure 1A.

P1P2

P3P4

Year 1 Year 2 Year 3 Year 4

A d v a n c e

w o r k s

Figure 2B: Construction timeline showing approximate duration of works in phases (P)


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Construction

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Figure 2C: Illustrative phases 1 and 2 construction plan

N

Cranes

Piling rig

Drop shaft

SOUTHWARK LEWISHAM

Maximum extent of construction site for

phases 1 and 2Site hoarding


Site support/welfare

Excavated materialstorage and processing

Maintenance workshopand storage

Construction support

Internal site road

Site access

Existing footpath tobe diverted

Footpath diversion


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N

Cranes

Drop shaft

Piling rig

SOUTHWARK LEWISHAM

Maximum extent of construction site for

this phase 3Site hoarding

Local authorityboundary

Site support/welfare

Maintenanceworkshop and storage

Construction support

Internal site road

Site access

Existing footpath tobe diverted

Footpath diversion

Figure 2D: Illustrative phase 3 construction plan


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Construction

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Additional works and activitiesThe main construction activities at this site are set out in

Table 2.1. We would also need to undertake additionalworks and activities, some of which may be locatedoutside of the area indicated by the red line in Figure 1A.The anticipated additional works and activities are setout in Table 2.2.

When Type of works What we would do

Required forconstructionphase

Installation of equipmentto monitor environmentalmatters such as noise,vibration and dust.

The locations of monitoring equipment would be agreed with thelocal authority and relevant landowners.

Protection works to third partystructures (such as buildings,bridges and tunnels).

We would undertake studies to identify any effects our constructionwork may have on third party structures. The studies mayrecommend particular construction methods or, in very limitedinstances, protection works.

If protection works to the existing sewer are required, we wouldaccess the sewer network through existing manholes.

Diversion of utilities. If utility diversions are required, we would work with utility providersto undertake the necessary works.

Temporary connection toutilities (such as water, sewer,

phone and electricity supply).

If we are unable to make a connection to water, sewer and phonesupplies within the pumping station site, we would need to makea connection to these in Yeoman Street or Chilton Grove. We mayneed to connect to an electricity supply from New Cross. However,we are still developing a route for electricity supply in discussion withthe utility provider.

Traffic management works.These may need to extend beyond our site and could includerelocating kerb lines, repainting road lines and modifying trafficsignals.

Required foroperationalphase

Permanent connection toutilities (such as water, phone

and electricity supply) for theoperational tunnel.

We expect to connect to utilities from within the site.

Table 2.2: Additional works and activities


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Construction transport and accessWe would transport materials to and from the site by

road. Table 2.3 sets out the anticipated average dailynumber of lorries visiting (ie travelling to and from) thesite during the peak months of each phase.

Construction traffic would access the site travellingnorthbound along Lower Road (A200), using the oneway system and turning left into Plough Way, rightinto Yeoman Street and right into the site from a newentrance on Yeoman Street. Traffic leaving the site would

turn right out of the site from a new entrance on CroftStreet, then travel along Chilton Grove, Yeoman Street,Plough Way and southbound along Lower Road (A200).This access route is shown on Figure 2E. Beyond this,construction traffic would use the major road network toget to and from its final destination.

We may need to suspend or relocate some parking bays

on Croft Street and several kerb spaces along Croft Streetand Yeoman Street during the construction period. Wemay also need to remove the traffic calming on YeomanStreet and Chilton Grove. There would be minor footpathdiversions around the site, as shown on Figures 2C and2D. Based on our current design, we do not anticipatethat any road diversions, bus stop relocations or junctionchanges would be required.

Phase 1

Site setup

Phase 2

Drop shaftconstruction

Phase 3

Construction of other structures

Phase 4

Completion of works and site

restoration

Average daily lorry visits 13 lorries 24 lorries 15 lorries 6 lorries

Table 2.3: Average daily lorry visits during the peak months

Related documents:

Transport


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Construction

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Figure 2E: Proposed access route to the site from the nearest major road

Yeoman Street

Plough Way

A200Lower Road

Deptford ChurchStreet

N

Y e o m a n

S t r e e t C r o f t S t r e e t

Rightturn out

Suspensionof parking

Rightturn in

TOWER HAMLETS

GREENWICH

A2

Draft limit of land tobe acquired or used

Internal site road

Site access


Transport for London(TfL) road network

Proposed lorry access toTfL road network


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Management of construction worksOur construction works would be managed in accordance

with an agreed Code of construction practice (CoCP) .For phase two consultation, we have produced a draftCoCP Part A: General requirements , informed by CoCPsfrom other major construction projects in London andconsultation with the local authorities. Through theenvironmental impact assessment process, scheme-wide principles to address potential effects on the localenvironment have been identified and integrated intothe design. The CoCP Part A sets out scheme-wide control

measures that would be used to minimise potentialeffects during the construction process.

Table 2.4 sets out what we consider to be the key issuesfor this site during construction, and how we are currentlyproposing to address them.

Related documents:

Environment

Managing construction

Transport


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Construction

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Issue Our response

Location of the site within the PloughWay Strategic Site Allocation, whichis allocated for comprehensive mixeduse redevelopment in the LondonBorough of Lewishams adoptedplanning policies.

Whilst the use of this site during construction would prevent it from beingavailable for redevelopment in the short term, the permanent layout anddesign of the site minimises the amount of land required permanently,allowing as much of the site as possible to be developed in accordance withthe councils planning policies.

Construction activities would requiresome businesses to be relocated.

We are in ongoing discussions with affected landowners and businesses toidentify an agreeable and appropriate solution.

Temporary suspension or relocationof some on-street parking on CroftStreet and Yeoman Street.

The extent and duration of the suspension of any on-street parking duringconstruction would be minimised as far as possible. We are investigatingoptions for temporary replacement parking provision during constructionwhere necessary.

Possible effect of construction

vehicle movements on adjoiningresidential streets.

We are proposing a one way system for construction vehicles. This would createa safe vehicle route that reduces the effects of construction traffic on localresidents. We would manage the effects of road transport through our trafficmanagement plans, which will seek to limit the number of vehicle movementsand hours of operation, identify the most suitable site access points and anynecessary highway management arrangements.

Possible effect of noise and vibrationfrom construction activities onneighbouring areas.

Since phase one consultation, the location of the shaft has been movedfurther north to reduce effects on residential properties to the south of the site.The contractor would be required to implement noise and vibration controlmeasures at the worksite, which will be set out in the CoCP.

The effects of air pollution and dustin neighbouring areas.

Preliminary findings indicate that while there is the potential for dust nuisanceeffects, there are unlikely to be any significant local air quality effects at anyof the sites. The contractor would put in place air and dust control measures atthe worksite, which will be set out in the CoCP.

Table 2.4: Key issues relating to construction


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Section 3: Future useThis section describes the site after the completion of theconstruction work, ie when the main tunnel is in use theoperational phase.

Design Since phase one consultation we have progressed thedesign for the permanent use and appearance of thestructures at Earl Pumping Station. The design of the

permanent proposals follows our scheme-wide principlesand takes into account comments made and ongoingengagement with the London Borough of Lewisham andother technical consultees.

Our permanent works need to incorporate functionalelements, which are required for the operation of thetunnel. These include:

Underground structures including: a CSO drop shaftwith an internal diameter of approximately 17m,connection culverts, interception chamber, valvechamber and a passive filter chamber.

Extension of the shaft and valve chamber

approximately 3m above ground level (with parapetwall above this), with access covers on top of thestructures. To ensure that they are finished to a certainlevel above the tunnel and because the site is low lying,these structures need to be extended aboveground level.

A main ventilation column incorporated into thevalve chamber.

A small diameter ventilation column to the interceptionchamber up to 6m high.

Maintenance vehicle access.

Electrical and control equipment installed within theexisting pumping station.

Table 3.1 sets out the site specific issues that haveinfluenced our permanent design proposals and how we

have addressed them in our proposed design.


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F u t ur e

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Future use

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Issue Our response

Effect on the existing pumpingstation infrastructure.

We have located and designed the permanent works to avoid effects upon existingabove and below ground infrastructure, and to enable the pumping station site toremain operational during and after construction.

Effect of permanent works onresidential amenity.

The shaft has been designed to minimise the above ground extent and maximise thearea of land available for potential future redevelopment.

Location of the site withinthe Plough Way Strategic SiteAllocation, which is allocatedfor comprehensive mixeduse redevelopment in theLondon Borough of Lewishamsadopted planning policies.

The permanent layout and design of the site minimises the amount of land that isneeded permanently, allowing as much of the site as possible to be developed inaccordance with the councils planning policies.

The shared surface hardstanding within the site would be designed to provide apotential future access through the site towards Yeoman Street in line the aspirationsof the council.

Accommodating the aboveground shaft structureto provide visual interestand discourage anti-socialbehaviour.

The shaft structure would be clad with decorative brickwork which would providevisual interest for the local community as well as a graffiti resistant surface coating.The roof would also be visible; a biodiverse roof that provides a wildlife habitat isbeing considered.

The shaft and site have been designed to encourage natural surveillance through thelayout and open sightlines around the structure.

Table 3.1: Site specific issues that have influenced our permanent design

E l P i S i


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Figure 3A: Photo of the site before the works

Figures 3A, 3B, 3C and 3D show the current site andprovide illustrations of our design proposals. Furtherinformation on the development of our design can be

found in the Design development report .

Related documents:

Design

F


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Future use

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Figure 3B: Artists impression of the site after the works are completed

E rl P mping St tion


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Figure 3C: Aerial view of the completed works

Future use


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Future use

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Figure 3D: Layout of site once construction works complete

Stairs up to roof accessed fromwithin pumpingstation compound

Publicly accessible pavedarea for shared use withfuture development

Ventilationstructures on roof

Removable bollards formaintenance accessaround drop shaft

Y e o m a n S t r e e t C h

i l t o n G

r o v e

Proposed valvechamber extendingabove ground level

Ventilationcolumn

Access formaintenancevehicles

Brickwallreinstated

Electrical and controlequipment located insideexisting pumping station

Drop shaft extendingapproximately 3mabove ground level with1m brick parapet

N

Temporary hoarding aroundsite for future development(by others)

New gates to compound

Biodiverse roof to drop shaftVentilationcolumn

Earl PumpingStation



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Operation and maintenanceOnce the tunnel is operational, we expect to undertakeinspection and maintenance of the ventilation and belowground equipment approximately once every three to sixmonths. This would be undertaken within our site and aspart of the existing maintenance routine.

Once every ten years, we expect to carry out a majorinternal inspection of the tunnel and undergroundstructures. This is likely to involve a small team of inspection staff, a small team of support crew and twomobile cranes to lower the team and inspection vehicleinto the shaft. This is likely to take several weeks, andwould all be undertaken within our site.

We may also need to make visits to the site for unplannedmaintenance or repairs, for example, if there is ablockage, or equipment failure. This may require the useof mobile cranes and vans.

Permanent vehicular access would be via the pumpingstation or from Croft Street.

Management of operational effectsWe have undertaken technical work, including stakeholderengagement, to assess and identify the key issuesassociated with this site once it is operational. Table3.2 summarises these issues and how we are currentlyproposing to address them.

Future use


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Future use

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Issue Our response

Possible odour effects duringthe operation of the tunnel.

Odour effects at this site are expected to be negligible because we have developedan Air management plan to minimise possible odour and air quality effects arisingfrom the operation of the tunnel. The technology we are proposing to use at this siteincludes the use of passive below ground carbon filters that will remove possible odourbefore air leaves the ventilation equipment.

Disturbance from futuremaintenance access.

The permanent access to our site would remain unchanged and visits would beundertaken as part of the existing maintenance routine.

Table 3.2: Key issues relating to site operation

Related documents:

Odour

Further information


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Further informationThis section sets out documents which may be of particular interest. Further information on our proposals can befound on our website (www.thamestunnelconsultation.co.uk) or is available upon request (call our customer centreon 0800 0721 086).

Phase two public consultation material

Project information papers include general information about the Thames Tunnel project. There are 17 projectinformation papers, which cover various aspects of the project. Those project information papers that may be of particular interest are set out below.

Icon Title Details

Build Provides information on the different types of sites required for the Thames Tunnelproject and the typical construction activities that will be undertaken at each site.

Q&A ConsultationSets out the consultation we have undertaken to date on the project, the scopeof this phase two consultation and how interested parties can respond to thisconsultation.

DesignContains the design principles which have influenced the permanent appearance of our sites once construction work is complete.

Environment Sets out the process the project is following to assess potential environmental effectsof the Thames Tunnel project.

Managingconstruction

Includes information on what measures our contractors will put in place at our sitesduring construction.

Odour Sets out our Air management plan and how it will work.

Options Outlines the various ways to deal with sewage overflows.


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Phase two public consultation material

Icon Title Details

Overflow Sets out how Londons sewerage system works and why the capital has an overflowproblem.

Route andtunnelalignment

Sets out the preferred route of the main tunnel and the reasons for our preference.

Site selection Sets out the process we followed to find and select our preferred sites.

Transport Contains information on the different transport options we have considered fordelivering and removing materials from our sites.

Further information


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Further information

Technical reports

Theme Icon Title Details

Phase oneconsultation

1

SUMMARY

Report on phase oneconsultation:summary report

Provides a summary of the comments made at phase oneconsultation and our responses.

Phase twoconstruction

information

Code of constructionpractice Part A:General requirements(CoCP)

Sets out control measures to be adopted during the projectconstruction period.

Phase twoenvironmentalinformation

Air managementplan

Outlines the methods which we will use to manage odourfrom the main tunnel at all our preferred sites.

Preliminaryenvironmentalinformation report(PEIR)

Contains initial assessments on the environmental effects of the Thames Tunnel project based on information collectedto date. Please refer to volume 24 of the non-technical

summary and volume 24 of the PEIR for more informationon this site.

Phase two schemedevelopment

Design developmentreport

Provides a general overview of how the scheme design ateach site has evolved to date. Please refer to chapter 22 formore information on this site.

2

Phase two scheme

development report

Provides an overview of the development of the ThamesTunnel project and how each site was chosen. Please refer toAppendix T for more information on this site.

Site glossary


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g y

Term Definition

Biodiverse roof A roof which supports a wide variety of plant and animal species and reducesstormwater runoff.

Carbon filters Filters that remove odours before the air is released from the tunnel.

Combined sewer A single sewer system that takes both rainwater and domestic and industrial wastewater.

Combined seweroverflow (CSO)

A structure, or series of structures, that allows sewers to overflow into the river when theyare full as a result of increased rainfall. Without the overflows, the sewers would back upand cause flooding in streets or houses.

Connection tunnel A tunnel connecting a drop shaft to the main tunnel.Draft limit of land to beacquired or used

The extent of land that we may need to use or acquire, or over which rights may be neededto carry out works that are essential to the project.

Drop shaftA vertical circular concrete structure, used to drop flows from the high level of the CSO tothe low level of the main tunnel. It would also be used to provide access to construct theconnection tunnels.

Foreshore Ground uncovered by the river when the tide is low.

Interception chamber A structure, built on an existing combined sewer, which diverts stormwater overflow into themain tunnel.

Main tunnel The tunnel from Acton Storm Tanks to Abbey Mills Pumping Station.

Operational phase After the completion of the construction work, when the main tunnel is in use.

Thames Tunnel projectThe Thames Tunnel project comprises a storage and transfer tunnel, from west London toBeckton Sewage Treatment Works in east London, and the control of 34 CSOs along the

Thames Tideway.Transport for LondonRoad Network (TLRN)

The network of roads managed by Transport for London. These are the major or strategicroads, which have high capacity.


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Phase two consultation: Earl Pumping Station

For further information or to comment on ourproposals see our website:www.thamestunnelconsultation.co.uk

110-ED-PNC-00000-000080

Autumn 2011

It is very important that you understand theinformation we have provided. If you needfurther information in another language,braille, large print or audio format pleasecontact us on 0800 0721 086.

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