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Introd
uction
King Edward MemorialPark Foreshore
Currently, untreated sewage regularly overows into the River Thames from Londons Victorian sewerage systemvia combined sewer overows (CSOs). The proposed Thames Tunnel would intercept these overows 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 benets 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 documentidenties our current preferred site at King Edward Memorial Park Foreshore.
Thames Tunnel
Siteinformationpaper
1
Key facts
Local authority: Tower Hamlets
CSO name: North East Storm Relief
CSO spill volume in an average year: 780,000m (equivalent to approximately
312 Olympic swimming pools)
Site type: CSO site
Duration of main construction works: Approximately three and a half years.
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Section 1: Introduction and site informationWe are proposing to use the foreshore of the River
Thames adjacent to King Edward Memorial Park for this
construction work, and to accommodate permanent
structures required to operate the main tunnel. The site
would be used to connect the existing local CSO, known
as the North East Storm Relief CSO, to the main tunnel.
An area within King Edward Memorial Park would also be
used temporarily for our construction works.
The location of the site is shown in Figure 1A. Part of
the site would be located within the foreshore of the
River Thames, with the remainder of the site located
within the multi-purpose sports area and park depot
in the south western corner of King Edward Memorial
Park. The Thames Path runs along the riverside and is
located within the site. To the north of the park is The
Highway (A1203). Free Trade Wharf, an apartment block,
is located to the east. To the south is Shadwell Basin
Outdoor Activity Centre and apartment blocks and to thewest is Glamis Road. The site is within the Wapping Wall
Conservation Area.
Related documents:
Build
This site information paper sets out our proposals at King
Edward Memorial Park Foreshore. We have also producedproject information papers, which cover overarching
topics relating to the project. Where we consider that a
project information paper is particularly relevant, we have
highlighted this in a related documents box. At the end
of 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
3
Figure 1A: King Edward Memorial Park Foreshore location plan
N
Shadwell Basin
King EdwardMemorial
Park
North EastStorm Relief CSO
Free Trade Wharf
CableStree
t
TheHighway
Glam
is Road
TOWER HAMLETS
SOUTHWARK
Local authority boundary
Draft limit of land to beacquired or used
Proposed tunnelroute centreline
Existing sewer
Existing CSO
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How we chose this site
What we proposed at phase one consultationAt phase one consultation, which was held between
September 2010 and January 2011, we presented King
Edward Memorial Park Foreshore as our preferred site
to intercept the existing North East Storm Relief CSO.
We proposed to directly intercept the existing sewer and
connect the CSO to the main tunnel within the foreshore
of the River Thames.
Why we have amended our proposals
Since January 2011, we have considered the comments
from phase one consultation, feedback from ongoing
engagement and new information; and undertaken
further technical work. This work led us to review potential
sites to intercept the CSO and how to connect it to the
main tunnel.
Since phase one consultation we have:
Looked again at the layout of our phase one
consultation foreshore site and access requirements.
Re-assessed all potential sites that could be used to
intercept the CSO.
Investigated options where the CSO could be
intercepted within King Edward Memorial Park with
a separate site being used to connect the CSO to the
main tunnel.
As a result of this work, an option could be to use King
Edward Memorial Park with a site at Heckford Street to
connect the CSO to the main tunnel. In order to seek
feedback on this potential preliminary working option,
in July 2011 we held drop-in sessions for the local
community to understand the options proposed at King
Edward Memorial Park Foreshore and Heckford Street. Wereviewed all the comments we received and took these
into account as part of the site selection process.
What we are proposing at phase two consultationWe have identified two shortlisted sites where we
would be able to intercept the CSO and connect to the
main tunnel within the site. The sites, as shown on
Figure 1B, are:
King Edward Memorial Park (site 1)
King Edward Memorial Park Foreshore
(our preferred site).When comparing, site 1 King Edward Memorial Park
with King Edward Memorial Park Foreshore, we concluded
that King Edward Memorial Park would be less suitable
because using the park would involve the temporary loss
of a large area of public open space and would be likely
to cause more disruption to users of the park.
In addition, we have identified three further shortlisted
sites, where the connection to the main tunnel would bemade at a separate site in conjunction with intercepting
the CSO within part of King Edward Memorial Park. The
sites, as shown on Figure 1B, are:
Heckford Street (site 2)
Shadwell Basin (site 3)
Limehouse Basin (site 4).
We decided that using Site 3 Shadwell Basin andSite 4 Limehouse Basin would be less suitable thanHeckford Street (site 2) because it would be technically
challenging to undertake the construction works within
water basins, the sites have poor access and they
are further away from the CSO. This means a longer
connection tunnel would be required from one of these
sites to the CSO in King Edward Memorial Park.
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Introduction
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Figure 1B: Preferred and shortlisted sites
Site 1
Site 2
Site 3
Site 4
N
TOWER HAMLETS
SOUTHWARK
Preferred site King Edward Memorial
Park ForeshoreOther shortlistedsite locations
Local authorityboundary
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The alignment of the main tunnel varies depending upon
where the CSO is connected to the main tunnel. Figure
1C shows how the CSO is connected to the main tunnel
and the different alignments of the main tunnel for KingEdward Memorial Park Foreshore and Heckford Street.
When comparing the sites, our conclusion is that, on
balance, King Edward Memorial Park Foreshore should
remain our preferred site. We propose to reduce thesize of the construction site in the foreshore of the
River Thames compared with our proposals at phase
one consultation, which would reduce the effect on
the foreshore and adjacent residential area. Office andwelfare buildings would be located in the depot and
hardstanding areas in the south western part of the
park. Our proposed temporary construction access has
moved from the north eastern corner of the park, off The
Highway (A1203), to Glamis Road. A significant length
of river frontage adjacent to the Rotherhithe Tunnel
ventilation shaft will remain accessible throughout the
construction period, as will the vast majority of the park.
After the construction works are completed, this accesswould remain and would offer an improved route for
the Thames Path to be integrated with the park. On
completion of our work, the park would be enlarged
due to the extension into foreshore. There would also
be opportunities to reinstate recreational facilities and
enhance the park facilities.
Related documents:
Q&A Consultation
Site selection
Site 2 Heckford Street is a shortlisted site that wouldneed to be used together with a site in King Edward
Memorial Park. This option is considered less suitable than
our preferred site because the combination of both sitesand the additional tunnelling works would be likely to
take longer, cause more disruption to both park users and
the local community, and put more traffic on local roads.
The site would result in the disruption and potential loss
of some businesses in an area where the local authority
is seeking to protect employment uses. The use of this
site would also result in greater effects on people living
and working near this site in comparison to our preferred
site as it would not be possible to utilise the River Thamesfor movement of materials. Furthermore the tunnels
would pass below significantly more buildings and the
connection tunnel would be at much shallower depth.
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Introduction
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N
Figure 1C: Connecting North East Storm Relief CSO to the main tunnel
TOWER HAMLETS
SOUTHWARK
Local authority boundary
Tunnel centre line(preferred site)
Tunnel centre line (site 2)
Existing sewer
Existing CSO
Preferred site King Edward Memorial
Park ForeshoreSite 2 Heckford Street
Connection tunnel
Worksite for CSOinterception
Worksite for shaftconstruction
Controlled (day time) crossing open unless road requiredby construction activities
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Section 2: Construction
Construction activitiesConstruction activities are required to intercept the CSO.We would construct an interception chamber to intercept
the CSO. A connection culvert would link the interception
chamber to a drop shaft (approximately 60m deep)
through which flows would pass into the main tunnel.
Figure 2A illustrates the below ground infrastructure
proposed. As the construction works would take place
within the foreshore of the River Thames, a permanent
structure projecting into the foreshore is required. Theseactivities would take place within the area indicated by
the red line in Figure 1A, in four main phases, lasting
approximately three and a half years in total. The main
construction activities associated with these phases are
set out in Table 2.1.
After completion of the works and site restoration we
may need to visit the site for short periods to support
finishing works at the bottom of the drop shaft, which willbe carried out from within the main tunnel and serviced
from the site at Chambers Wharf. For example, we may
need to provide ventilation for the workers in the main
tunnel and a means of emergency escape.
Related documents:
Build
Managing construction
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Construction
Construction
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Main tunnel
Drop shaftValve chamber
Existingoverfowto River Thames
Interceptionchamber
Existing sewer
Connection culvert
Figure 2A: Illustration showing typical elements of below ground infrastructure
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Advance works
Phase 1
Site setup
Figure reference Figure 2C
Typical working hours Varies Standard
Mainconstructionactivities
Utilities connected
Utilities diverted or protected
Pre-construction landscape works carried out
Site cleared
Temporary works in River Thames constructed
Site facilities and access set up
Drop shaft excavated and built
Above and below ground structures constructed
Mechanical and electrical equipment installed
Temporary works in the River Thames removed
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 Saturdays
Continuous: 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
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Construction
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Phase 2
Drop shaft
construction
Phase 3
Construction of
other structures
Phase 4
Completion of
works and siterestoration
Figure 2D Figure 2E
Standard with occasional
extended standardStandard Standard
* 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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Site layout and construction phasesFigures 2C, 2D and 2E show how the site might be laid
out during the construction phases, which are set outin Table 2.1 and Figure 2B. These layouts have been
informed by the size of the infrastructure proposed,
the construction methods required and the location
of neighbouring buildings and structures. They have
also been developed to minimise effects on the local
community and environment. Particular factors at this site
that have influenced the layout are as follows:
Since phase one consultation, the temporary office andwelfare buildings required to service the construction
site have been moved from the foreshore of the River
Thames to the multi-purpose sports area and park
depot in the south western corner of the park. A smaller
area of foreshore is now required for the construction
works, thereby reducing potential effects on river
ecology, river navigation and river users.
The access route to the site has been amended since
phase one consultation. The proposed access at phaseone consultation was from the north of the site, directly
off The Highway (A1203). We are now proposing to
access the site from the south west, off Glamis Road.
The proposed construction access would reduce the
effects of construction traffic on the strategic highway
network and provide a safer access to the site via an
existing traffic light controlled junction.
In addition the new access road avoids a wildlifemeadow in the eastern part of the park and is also
located further from the Free Trade Wharf residential
development and the access to Free Trade Wharf. The
proposed access route through the park runs parallel to
the river frontage and offers an opportunity to reinstate
the Thames Path with improved pedestrian and cycle
access on completion of the project.
The site layouts are indicative only, and the contractormay arrange the site in a different way, depending on
the chosen construction methods, provided that any
environmental effects are appropriately managed and
that the main construction activities are undertaken
within the red line shown in Figure 1A.P1
P2
P3
P4
Advance
works
Year 1 Year 2 Year 3 Year 4
Figure 2B: Construction timeline showing approximateduration of works in phases (P)
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Construction
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Figure 2C: Illustrative phase 1 construction plan
N
Jack up bargeservicing piling
operationsBarge
Maximum extent ofconstruction site for
phase 1Site hoarding
Cofferdam
Local authorityboundary
Site support/welfare
Internal site roadSite access
Existing Thames Path
Thames Path diversion
TOWER HAMLETS SOUTHWARK
Controlled (day time)crossing openunless required byconstruction activities
Diversion only required when
internal site road in use
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Figure 2D: Illustrative phase 2 construction plan
Controlled (day time)crossing openunless required byconstruction activities
Diversion only required wheninternal site road in use
Drop shaft
Crane
Piling rig
N
Maximum extent ofconstruction site forphase 2
Site hoarding
Cofferdam
Local authority boundary
Site support/welfare
Excavated materialstorage and processing
Maintenance workshopand storage
Construction supportInternal site road
Site access
Existing Thames Path
Thames Path diversion
TOWER HAMLETS SOUTHWARK
Barge
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Construction
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Option for contractorto transport materialsusing barges
Controlled (day time)crossing openunless required byconstruction activities
Diversion only required wheninternal site road in use
Drop shaft
Cranes
N
Maximum extent ofconstruction site forphase 3
Site hoarding
Cofferdam
Local authority boundary
Site support/welfare
Excavated materialstorage and processing
Construction support
Internal site road
Site access
Existing Thames Path
Thames Path diversion
TOWER HAMLETS SOUTHWARK
Figure 2E: Illustrative phase 3 construction plan
Ki Ed d M i l P k F h
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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 additional
works and activities, some of which may be located
outside of the area indicated by the red line in Figure 1A.
The anticipated additional works and activities are set
out in Table 2.2.
When Type of works What we would do
Required for
construction
phase
Installation of equipmentto monitor environmental
matters such as noise,
vibration and dust.
The locations of monitoring equipment would be agreed with the
local authority and relevant landowners.
Protection works to third
party structures (such
as buildings, bridges
and tunnels).
We would undertake studies to identify any effects our construction
work may have on third party structures. The studies may recommend
particular construction methods or, in very limited instances,
protection works.
If protection works are required to the existing sewer, we would
access the sewer network through existing manholes.
Diversion of utilities.If utility diversions are required, we would work with utility providers
to undertake the necessary works.
Temporary connection
to utilities (such as
water, sewer, phone and
electricity).
We expect to connect to water, sewer and phone supplies in Glamis
Road or The Highway (A1203).
We may need to connect to a power supply in Welclose Square,
running cables long Cable Street and Glamis Road. However, we are
still developing a route for electricity supply in discussion with the
utility provider.
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Construction
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Table 2.2: Additional works and activities
When Type of works What we would do
Required for
construction
phase
Traffic management works.
These may need to extend beyond our site and could include
relocating kerb lines, repainting road lines and modifying traffic
signals.
Dredging.
There is a possibility that as the detailed design is developed we may
need to undertake dredging to allow barges to get to and from our
site.
Protection of river bed.We may need to carry out works to strengthen the river bed to avoid
scour.
Landscaping works
completed in advance of the
main construction works.
We would reconfigure and relocate the multi-purpose sports area,
childrens playground and memorial benches within the park. The
memorial benches would be moved to a new permanent location as
shown in Figure 3D. We would dismantle the bandstand and store it
so that it can be re-erected at the end of construction works. Paving
and landscaping works to the seating area next to the Rotherhithe
Tunnel ventilation shaft would also be undertaken.
Required for
operational
phase
Permanent connection
to utilities (such as water,
phone and electricity
supply) for the operational
tunnel.
We expect to connect to utilities in Glamis Road or The Highway
(A1203).
Landscaping works.
The multi-purpose sports area would be reinstated in its existing
location. We would relocate the childrens playground to a new
permanent location within the park, as shown in Figure 3E.
King Ed ard Memorial Park Foreshore
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King Edward Memorial Park Foreshore
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Construction transport and accessWe propose to use barges to bring in and take away the
material used to fill the cofferdam and to take away
excavated material from the shaft. It is not generally
practical and cost effective to transport all materials
to and from the site by barge so we would still need to
transport some materials by road. We would however
give the contractor the flexibility to determine the most
practical and cost-effective means of transporting other
materials and equipment.
Each barge would remove approximately 55 lorries from
the road. Using barges at this site would reduce the
number of lorry visits to/ from this site by approximately
55% (saving 12,000 lorry visits over the construction
period of approximately three and a half years). Table 2.3
sets out the anticipated average daily number of lorries
and barges visiting (ie travelling to and from) the site
during the peak months of each phase, based on moving
cofferdam fill material by barge.
Construction traffic would access the site from The
Highway (A1203), travelling south down Glamis Road and
turning left into the site from a new entrance on Glamis
Road. Traffic would leave the site via the same route.
This access route is shown on Figure 2F. Beyond this,
construction traffic would use the major road network to
get to and from its final destination.
We may need to suspend or relocate some coach parking
bays on Glamis Road during construction. We may also
need to make some modifications to the junction of
Glamis Road and The Highway (A1203) to accommodate
construction traffic turning into Glamis Road.
The Thames Path currently runs through the park. Since
the Thames Path would be located within part of our
construction site, it would be necessary to temporarily
divert the Thames Path around part of our site. In order
for the diverted Thames Path to re-join the existing
Thames Path, it would need to cross our internal site
road. Should construction vehicles be using the road,
a gated access would prevent pedestrians and cyclists
crossing it. This arrangement would mean that access
to the seating area next to the Rotherhithe Tunnel
ventilation shaft, which provides views across the River
Thames, would be maintained. When the road is in use,
pedestrians and cyclists would be directed to a diversion,
which runs through the park as shown on Figures 2C, 2Dand 2E. Based on our current design we do not anticipate
that any other footpath or road diversions or bus stop
relocations would be required.
Phase 1Site setup
Phase 2Drop shaft
construction
Phase 3Construction ofother structures
Phase 4Completion ofworks and site
restoration
Average daily
lorry visits13 lorries 19 lorries 22 lorries 7 lorries
Average daily
barge visits 2 barges 1 barge none 2 barges
Table 2.3: Average daily lorry and barge visits during the peak months
Construction
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Construction
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Related documents:
Transport
Figure 2F: Proposed access route to the site from the nearest major road
RotherhitheTunnel
The HighwayPossible junction
modifications
Glamis Road
GlamisRoad
Suspensionof coachparking
A1203
A101
Left turn in,right turn out
TOWER HAMLETS SOUTHWARK N
Draft limit of land tobe acquired or used
Internal site road
Site access
Local authority boundary
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 draft
CoCP Part A: General requirements, informed by CoCPsfrom other major construction projects in London and
consultation with the local authorities. Through the
environmental impact assessment process, scheme-
wide principles to address potential effects on the local
environment have been identified and integrated into
the design. The CoCP Part A sets out scheme-wide control
measures that would be used to minimise potentialeffects during the construction process.
Issue Our response
Permanent relocation
of the childrens
playground, currently
located in the south
western corner of the
park.
Prior to the main construction phase, the playground would be relocated within the park.We would work with park users and the London Borough of Tower Hamlets to agree the
relocation and design of the playground.
Temporary loss of part
of the multi-purpose
sports area and some
tennis courts, located
in the south westerncorner of the park.
During construction, some of the tennis courts would be used to provide a temporary
replacement multi-purpose sports area. The multi-purpose sports area would be reinstated in
its existing location and in an improved condition following completion of construction.
Potential loss of and
damage to trees within
the park.
We have sought to minimise tree loss and damage where possible, and will propose careful
root protection, pollarding and trimming methods. Proposals for permanent site landscaping
incorporate the planting of more trees than the number expected to be lost during
construction. Where possible it is intended that landscaping would be undertaken in advance
of the main construction works commencing.
Table 2.4 sets out what we consider to be the key issues
for this site during construction, and how we are currently
proposing to address them.
Related documents:
Environment
Construction
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Construction
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Issue Our response
Temporary diversionof the Thames Path,
restricted access to the
riverfront and possible
loss of river views.
Access to the Thames Path next to the River Thames beside the Rotherhithe Tunnel
ventilation shaft would be maintained throughout construction. Gated access across the
internal site road would allow access from the ventilation shaft to the rest of the park when it
is not being used by construction vehicles. Views over the River Thames would be temporarily
affected during construction. However, access will be maintained to the river front from parts
of the park including the new seating area beside the Rotherhithe Tunnel ventilation shaft.
Possible effect ofconstruction vehicles
on the capacity and
operation of the local
road network.
Since phase one consultation, site access has been relocated to the south west side of the
park, off Glamis Road to reduce the effects of construction traffic on the major road network
and provide safer site access.
We would manage the effects of road transport through our traffic management plans,
which will seek to limit the number of vehicle movements and hours of operation, identify
the most suitable site access points and any necessary highway management arrangements.
As already set out, we also propose to use barges to bring in and take away the majority
of material used to fill the cofferdam, which would significantly reduce the number of lorry
movements from this site over the construction period.
Temporary suspension
or relocation of somecoach parking bays on
Glamis Road.
The extent and duration of the suspension of any coach bays during construction wouldbe minimised as far as possible. We are investigating options for temporary replacement
parking provision during construction where necessary.
Possible effect of
foreshore construction
activities on river
navigation and river
users of the River
Thames, including the
Shadwell Basin Outdoor
Activity Centre.
Since phase one consultation, we have reduced the area of temporary cofferdam foreshore
extension by relocating those construction activities that do not need to be located
immediately adjacent to the main tunnel site to the areas of hardstanding on the western
side of the park, near Glamis Road.
We have undertaken modelling to test the effect that the structure has on the flow of theriver. The modelling has shown the proposed structure to be satisfactory and the Port of
London Authority and other key stakeholders are satisfied the permanent works have a
minimum effect on river navigation. A full navigational risk assessment will be undertaken
for the temporary and permanent works. Existing moorings may have to be temporarily
relocated.
Table 2.4: Key issues relating to construction
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Issue Our response
Possible effect of noiseand vibration from
construction activities
on neighbouring areas.
Since phase one consultation, we have relocated the construction site access point to Glamis
Road on the west of the site, to reduce effects on the nearest residential properties. The
contractor would also be required to implement noise and vibration control measures at the
worksite, which will be set out in the CoCP.
Possible effects on
local air quality and
dust nuisance in
neighbouring areas.
Preliminary findings indicate that while there is the potential for dust nuisance effects, there
are unlikely to be any significant local air quality effects at any of the sites. The contractor
would put in place air and dust control measures at the worksite, which will be set out in the
CoCP.
Possible effects on
foreshore habitat and
river wildlife within the
River Thames.
Since phase one consultation, we have reduced the area of temporary cofferdam foreshore
extension to reduce potential effects on ecology. Ecological surveys are also being
undertaken to identify possible effects arising from construction activities. The contractor
would put in place various control measures at the worksite to minimise these effects as far
as possible. These will be set out in the CoCP.
Table 2.4: Key issues relating to construction
Related documents:
Managing construction
Transport
Future use
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Future
use
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Section 3: Future use
This section describes the site after the completion of theconstruction work, ie when the main tunnel is in use the
operational phase.
Design
Since phase one consultation we have progressed the
design for the permanent use and appearance of the
structures at King Edward Memorial Park Foreshore. The
design of the permanent proposals follows our scheme-
wide principles and takes into account comments made
and ongoing engagement with the London Borough of
Tower Hamlets and other technical consultees.
Our permanent works which are formed within a structureextending into the foreshore of the River Thames need to
incorporate functional elements, which are required for
the operation of the tunnel. These include:
Underground structures with ground level access covers
including: a CSO drop shaft with an internal diameter
of approximately 20m, connection culverts, interception
chamber, valve chamber and a passive filter chamber.
Two main ventilation columns up to 5m high.
Two small diameter ventilation columns to the
interception chamber up to 6m high.
Maintenance vehicle access.
An electrical and control kiosk.
Table 3.1 sets out the site specific issues that have
influenced our permanent design proposals and how we
have addressed them in our proposed design.
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Issue Our response
Effect on Rotherhithe Tunnel Careful siting of foreshore extension and permanent works to avoid infringing intothe protected zone of the Rotherhithe Tunnel.
Accommodation of Cole Stairs
and Bell Wharf CSOs (two
existing local CSOs that do not
need to be intercepted as part
of the Thames Tunnel project
based on the assessment
undertaken by theEnvironment Agency).
Careful siting of foreshore extension and permanent works to ensure that the
two further CSOs not being intercepted remain operational either side of the new
structure. Avoiding interference with these CSOs ensures that they do not need to
be incorporated into the works and therefore the size of construction site required is
minimised.
Effect on King Edward
Memorial Park.
The proposed above ground structures have been reduced in size since phase
one consultation, as a result of the modified scheme-wide ventilation strategy. In
addition the proposed electrical and control kiosk has been relocated to the eastern
perimeter of the park. Removing this structure from the foreshore extension makes it
less visible and avoids interrupting views of the River Thames.
A number of architectural design developments have taken place to ensure that thearchitectural design of the above ground structures and the foreshore extension is
sympathetic to the park.
The new foreshore structure would extend the area of the park as it will be designed
to blend with the existing green space.
Effect on the setting of the
Grade II listed Rotherhithe
Tunnel ventilation shaft andcharacter of the Wapping Wall
Conservation Area.
The majority of the proposed permanent works on this site would be below or at
ground level to avoid any significant effect on the setting of the listed buildings or
character of the Conservation Area. Landscaping for the extended and reinstatedareas of the park would be designed in consultation with the relevant stakeholders to
ensure that the character of the Conservation Area is preserved and enhanced.
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Issue Our response
Effects on river navigation
and hydraulics.
We have reduced the size of the foreshore area required for permanent works sincephase one consultation by moving the shaft closer to the river wall and re-profiling
the foreshore extension to minimise effects on river flows.
Preliminary modelling has indicated that the proposed design is acceptable in terms
of river flow.
The proposals have been discussed with the Port of London Authority and other key
stakeholders to develop a layout that has a minimal effect on river navigation.
Loss of foreshore habitat and
effects on ecology within the
River Thames.
Our proposals for the permanent layout and design of the site have sought to reduce
the extent of the permanent works within the foreshore to minimise effects on water
ecology as far as possible.
Ecological surveys of the River Thames and its foreshore are being undertaken to
identify possible effects, and design measures will be incorporated where required.
Construction of the tunnel would also deliver river wide improvements to local water
quality, which would result in positive effects on river ecology, including habitat
improvements and reduced fish kills.
Effect on Thames Path.
The permanent arrangement for the access route to our site from Glamis Road
would provide an opportunity to use this as an enhanced Thames Path route for
pedestrians and cyclists. The current Thames Path off Glamis Road is via a narrow
and enclosed footway which could be widened and include potential landscaping
improvements. The design of this route would be informed by the assessments of
the current use and quality of the park along with ongoing consultation with the key
stakeholders including the local authority.Table 3.1: Site specific issues that have influenced our permanent design
King Edward Memorial Park Foreshore
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g d a d e o a a o es o e
26
Figure 3A: Photo of the site before the works
Figures 3A, 3B, 3C, 3D and 3E show the current site and
provide illustrations of our design proposals. Further
information on the development of our design can be
found in theDesign development report
.
Related documents:
Design
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Figure 3B: Artists impression of the site after the works are completed
King Edward Memorial Park Foreshore
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Figure 3C: Layout of the site showing landscape advance works
Memorial Park benchespermanently relocatedin line with Memorial
Thames Path divertedaround constructionsite hoarding
The Highway
Proposed
constructionsite
Glam
isRoad
Relocatedchildrensplay area
Paving and landscapingimprovements to areaaround Rotherhithe
Tunnel ventilation shaft
Thames Pathremains open duringconstruction
Minorreconfigurationof tennis courts
Advanced treeplanting to improveMemorial Avenue
Relocated multi-purpose sports area
N
Proposedconstruction
site
Controlled (daytime)crossing of constructionaccess route open unlessrequired by construction
activities
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Figure 3D: Layout of site once construction works complete
Grassed area aroundrelocated bandstand
Electrical andcontrol kiosk againstexisting brick wall
Relocatedbandstand
Memorial Parkbenches relocated online with Memorial
Ventilationcolumns
Seating areaActivity/fitness zone
Bike stands New gated entrance topark and Thames path
N
Footballpitch
The Highway
Glam
isRoad
Tenniscourts
Relocatedchildrens play areaFootball pitch access
Thames Path widenedand improved.Provides maintenanceaccess to shaft
New North EastStorm ReliefCSO outlet
Bowlinggreen
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Figure 3E: Aerial view of the completed works
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Operation and maintenanceOnce the tunnel is operational, we would need access
to the site occasionally for inspection and maintenance
purposes. We expect to visit the site approximatelyonce every three to six months to carry out inspections
and maintenance of the ventilation and below ground
equipment. This is likely to involve a visit by staff in a
small van, and may take several hours.
Once every ten years, we expect to carry out a major
internal inspection of the tunnel and underground
structures. 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 vehicle
into the shaft. This is likely to take several weeks, and
would require temporary fencing around the shaft for
safety and security while the inspection takes place.
We may also need to make visits to the site for unplanned
maintenance or repairs, for example, if there is a
blockage, or equipment failure. This may require the use
of mobile cranes and vans. Permanent vehicular accesswould be from Glamis Road.
Management of operational effectsWe have undertaken technical work, including stakeholder
engagement, to assess and identify the key issues
associated with this site once it is operational. Table3.2 summarises these issues and how we are currently
proposing to address them.
Issue Our response
Possible odour effects during
the operation of the tunnel.
Odour effects at this site are expected to be negligible because we have developedanAir 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
site includes the use of passive below ground carbon filters that will remove possible
odour before air leaves the ventilation equipment.
Disturbance from future
maintenance access.
Permanent access would be required for maintenance and servicing purposes to
the shaft and ventilation equipment. Any planned maintenance visits would be
undertaken during normal working hours and all visits managed to avoid disruption
to local residents, businesses and users of affected public areas as far as possible.
Table 3.2: Key issues relating to site operation
Related documents:
Odour
Further information
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This section sets out documents which may be of particular interest. Further information on our proposals can be
found on our website (www.thamestunnelconsultation.co.uk) or is available upon request (call our customer centre
on 0800 0721 086).
Phase two public consultation material
Project information papers include general information about the Thames Tunnel project. There are 17 project
information 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
BuildProvides information on the different types of sites required for the Thames Tunnel
project 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 scope
of this phase two consultation and how interested parties can respond to this
consultation.
Design
Contains the design principles which have influenced the permanent appearance of
our sites once construction work is complete.
EnvironmentSets out the process the project is following to assess potential environmental effects
of the Thames Tunnel project.
Managing
construction
Includes information on what measures our contractors will put in place at our sites
during construction.
Odour Sets out ourAir 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
OverflowSets out how Londons sewerage system works and why the capital has an overflow
problem.
Route and
tunnel
alignment
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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Technical reports
Theme Icon Title Details
Interim
engagement
Interim engagement
report
Provides a summary of the public engagement we
have undertaken between phase one and phase two
consultations.
Phase one
consultation1
SUMMARY
Report on phase one
consultation:
summary report
Provides a summary of the comments made at phase one
consultation and our responses.
Phase two
construction
information
Code of construction
practice Part A:
General requirements
(CoCP)
Sets out control measures to be adopted during the project
construction period.
Phase twoenvironmental
information
Air management
plan
Outlines the methods which we will use to manage odour
from the main tunnel at all our preferred sites.
Preliminary
environmental
information report
(PEIR)
Contains initial assessments on the environmental effects ofthe Thames Tunnel project based on information collected
to date. Please refer to volume 23 of the non-technical
summary and volume 23 of the PEIR for more information
on this site.
Phase two scheme
development
Design development
report
Provides a general overview of how the scheme design at
each site has evolved to date. Please refer to chapter 20 for
more information on this site.
2
Phase two scheme
development report
Provides an overview of the development of the Thames
Tunnel project and how each site was chosen. Please refer to
Appendix S for more information on this site.
Site glossary
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Term Definition
Carbon filters Filters that remove odours before the air is released from the tunnel.
CofferdamA wall that is constructed within the river around the outside of the working area and then
pumped dry. The inside of the cofferdam can then be filled to create a safe working area.
Combined sewer A single sewer system that takes both rainwater and domestic and industrial wastewater.
Combined sewer
overflow (CSO)
A structure, or series of structures, that allows sewers to overflow into the river when they
are full as a result of increased rainfall. Without the overflow, the sewer would back up and
cause flooding in streets or houses.
Connection tunnel A tunnel connecting a drop shaft to the main tunnel.
Conservation areaAn area designated by the local authority or English Heritage as having special
architectural or historical interest.
Draft limit of land to be
acquired or used
The extent of land that we may need to use or acquire, or over which rights may be needed
to carry out works that are essential to the project.
Drop shaft
A vertical circular concrete structure, used to drop flows from the high level of the CSO to
the low level of the main tunnel. It would also be used to provide access to construct the
connection tunnels.Foreshore Ground uncovered by the river when the tide is low.
Interception chamberA structure, built on an existing combined sewer, which diverts stormwater overflow into the
main 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.
Scour Movement of the riverbed materials due to the force of the water.
Thames Tunnel project
The Thames Tunnel project comprises a storage and transfer tunnel, from west London to
Beckton Sewage Treatment Works in east London, and the control of 34 CSOs along the
Thames Tideway.
Transport for London
Road Network (TLRN)
The network of roads managed by Transport for London. These are the major or strategic
roads, which have high capacity.
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Phase two consultation: King Edward Memorial Park Foreshore
For further information or to comment on our
proposals see our website:
www.thamestunnelconsultation.co.uk
110-ED-PNC-00000-000086
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.