Thames Tideway Tunnel Project — Main Works — Category 1, C405 Thames Tideway Tunnel — Main Works — W
Thames Water Utilities Limited | Published October 28, 2015
BMB Joint Venture: BAM Nuttall Limited, Morgan Sindall Plc and Balfour Beatty Group Limited, Ferrovial Agroman (UK) Limited, Laing O'Rourke Construction Limited, together as FLo Joint Venture, CVB Joint Venture: Costain Limited, Vinci Construction Grands Projets and Bachy Soletanche Limited
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Although this procurement was commenced and conducted by Thames Water Utilities Limited (TWUL), the contract is entered into by the successful Infrastructure Provider, Bazalgette Tunnel Limited, pursuant to the procedure set out in Section VI.3) of that contract notice. The Infrastructure Provider is a body designated by the Secretary of State for the Environment, Food and Rural Affairs or by Ofwat (the Water Services Regulation Authority) (as the case may be) in respect of the Project or part(s) of the Project under or by virtue of Section 36D of the Water Industry Act 1991 (as inserted by Section 35 of the Flood and Water Management Act 2010) and pursuant to the Water Industry (specified Infrastructure Projects) (English undertakers) Regulations 2013 (SI 2013/1582).
The works and services to be provided pursuant to the Contract(s) will be undertaking in London, UK across circa 21 sites from Acton in the West to Abbey Mills in the East, along and underneath the River Thames and connecting with Lee Tunnel (currently under construction). The Contract(s) are for the design, construction, commissioning and (during the caretaker period) maintenance of the Thames Tideway Tunnel and are separated into 3 Lots (3 separate Contracts) as follows:
— Main Works — West — main tunnel drive including shafts and connections — Carnwath Road Riverside to Acton Storm Water Tanks and long connection tunnel drive — Frogmore;
— Main Works — Central — mail tunnel drives including shafts and connections — Kirtling Street to Carnwath Road Riverside (West) and Kirtling Street to Chambers Wharf (East); and
— Main Works — East — main tunnel drive including shafts and connections — Chambers Wharf to Abbey Mills Pumping Station and long connection tunnel drive — Greenwich Pumping Station t Chambers Wharf.
The London Tideways Improvements (of which the Thames Tideway Tunnel and the Lee Tunnel form a part) will modernise London's sewerage system, delivering environmental and economic benefits to the UK's capital for generations. The Thames Tideway Tunnel is a major new sewer to be designed and constructed to help manage the problem of untreated sewage overflowing from the capital's sewers via combined sewer overflows (CSOs) and is intended (once constructed) to enable the UK to meet the requirements of the Urban Waste Water Treatment Directive when operated in conjunction with the Lee Tunnel.
The Thames Tideway Tunnel Project (the Project) comprises:
— wastewater sewers and tunnels;
— design, construction, commissioning, operation, financing and maintenance of the main tunnel and connection tunnels;
— CSO drop shafts, short connection tunnels and associated development to intercept flows and divert them into the main tunnel or connection tunnels;
— works to modify Thames Water's existing pumping stations and sewers;
— associated development to facilitate construction of the tunnels and shafts; and
— such other works and/or services as are necessary to deliver Thames Tideway Tunnel Project.
The 6,5-7,2 m-diameter, 25 km-long main tunnel between Thames Water's existing operational sites at Acton Storm Tanks and Abbey Mills Pumping Station will control untreated sewage from 34 CSOs identified as ‘unsatisfactory’ by the Environment Agency. Sewage flows captured in the Thames Tideway Tunnel are intended to be transferred down the Thames Tideway Tunnel route for pumping out and treatment at Beckton Sewage Treatment Works via the Lee Tunnel. The long connection tunnels are known as the Frogmore connection tunnel (2,6 m-diameter and 1,1 km-long) and the Greenwich connection tunnel (5 m-diameter and 4,6 km-long) (measurements are approximate). Contractors will be required to design, build and/or procure Equipment including tunnel boring machines (TBMs) and diaphragm walling equipment to construct the relevant sections of the Thames Tideway Tunnel. Applicants should note that the Thames Tideway Tunnel will pass under existing infrastructure, including bridges, transport and utility tunnels, in-river structures, river walls and buildings and protective measures will need to be taken into consideration when designing and implementing the works.
Key objectives for the delivery of the Thames Tideway Tunnel include ensuring highest quality construction, current best practice with regards to the safety regime and full consideration for whole life maintenance costs in selection of materials and constructions techniques.