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Putney Society
Monday 28th November 2016
Background
• Tens of millions tonnes of sewage are discharged into the Tidal River Thames
every year
• 50 discharges on average in a typical year
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1860
2 million
1910
4 million
20138 million
Bazalgette
design capacity
Population of London
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Combined Sewer Overflow (CSO) at Putney
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125 species of fish known to occur in the TidewayLow dissolved oxygen events can cause 90% mortality of sensitive species (e.g. smelt, dace, salmon)Juvenile fish surveys added to current understanding of dissolved oxygen related fish mortalitiesThames Tunnel will enable compliance with WFD dissolved oxygen standards
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London Tideway Improvements
Riverside
Long ReachMogden
Crossness
Sewage Works Upgrades
Lee Tunnel
Thames Tideway Tunnel
Beckton
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Thames Tideway Tunnel
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Main Contractors
West
BMB
Central
FLO
East
CVB
System
Integrator
Construction
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During construction
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Completion
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The Putney Embankment Foreshore site is on the southern bank of the River Thames. There are two sites: a main construction site and an area to build a temporary slipway to maintain public access to the River Thames.This site will be used to intercept the Putney Bridge combined sewer overflow.
Putney Embankment Foreshore
Overview
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The Problem:At this location, in a typical year, there would be 33 discharges of untreated sewage with a volume of about 68,000 tonnes into the tidal River Thames.
The Solution:Our Putney Embankment Foreshore site will control the discharges from the Putney Bridge combined sewer overflow. When the tunnel is in operation it is expected that only one discharge will occur.
Project Duration:Construction is due to be begin in 2016 and will take three and a half years.
Site details: A temporary slip way will be constructed approximately 300m upstream of Putney Bridge. CSO drop shaft will have a depth of approximately 36m and an internal diameter of approximately 6m.
Putney Embankment Foreshore
Overview
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Pre works:First stage Navigational Risk Assessment for in river works completeRelocation of moored vessels prior to building temporary slipwayStart of temporary slipway construction: End of November 2016Temporary slipway complete prior to the late March 2017 Boat Race season
Main works: Construction of underground structures to connect the CSO to the shaftShaft (36m deep, 6m diameter) to be constructed within the river foreshoreShaft will transfer combined sewage flows from the CSO to main tunnel via 48m long connection tunnelStart of foreshore works construction: End of July 2016Foreshore works complete by spring 2020
Putney Embankment Foreshore
Overview
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Temporary Slipway plan
ChasNewens
ConstitutionalClub
Temporary slipway
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Temporary SlipwayPiling works – December 2016
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Construction of the Temporary SlipwayJanuary 2017 – March 2017
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Temporary Slipway plan
Construction deliveries:93% by river/ by barge7% by road
Construction deliveries via Glendarvon Road limited to 10:00 – 15:00
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Completion of the Temporary Slipway – End of March 2017
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Main Site Plan
Start of works: July 2017Duration: 3 years
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Putney Embankment ForeshoreTimeline of Work
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
Temporary Slipway Set up and Construction November 16 - March 17
Foreshore Set Up July 17 - November 17
Drop Shaft including cofferdam October 17 - April 19
Short Connection Tunnel June 18- April 19
CSO Modifcations February 18- April 19
Connection Culvert March 19 - August 19
Valve Chambers September 18 - July 19
Fit Out, Landscape and MEICA July 19- May 20
2016 2017 2018 2019 2020
Main works put back to end of July 2017 to accommodate fish spawning March-June and to allow the public to enjoy the river during the summer season.
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What focus do you want for the artwork?
Legacy
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Concept images of Foreshore under consultation with LBW
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Foreshore Street Furniture
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Waterman’s Green Kiosk
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Lighting layout
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Examples of lighting impact
Community and Contact
Thames Tideway Tunnel Working Group for Putney
Embankment Foreshore and Barn Elms (CLWG)
• Helps us keep communities and businesses well informed
about the project’s progress
• Your opportunity to express your views and influence local
communication activity
• A forum for the community to discuss, understand and
potentially influence the way we undertake construction
activity
• Meetings are held quarterly. All welcome.
Chaired by Justine Greening MP
Phone our Helpdesk on 08000 30 80 80 or email:
[email protected] to register your interest.
Wandsworth Christmas Fair & Tideway Carol Service
Wandsworth Christmas Fair
• Tideway BMB sponsoring the Christmas Tree
• Tideway BMB have stall providing information on scheme
• Friday 2nd December 12noon-8pm
Tideway Carol service
• Held at St Mary’s Church, Putney• Wednesday 14th December 6pm
Helpdesk and Community Contact
Tideway Helpdesk:
Call: 08000 30 80 80
Email: [email protected]
Write to: Freepost TIDEWAY
Community Relations Manager
Patrick Kelly
Mobile: 07773 576 599
Email: [email protected]
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Questions
