Thames Tideway Tunnel - C405 Main Works West - Acton Storm Tanks - Syphon Main and Rising Works

The Thames Tideway Tunnel project (the Project) will control CSO discharges by intercepting and diverting combined sewage flows into a new storage and transfer tunnel. The main tunnel will run from Acton Storm Tanks in west London to Abbey Mills Pumping Station in the east, where it will connect to the Lee Tunnel, which will transfer the combined sewage to Beckton Sewage Treatment Works for treatment. The Project extends from Acton Storm Tanks in west London, to Abbey Mills Pumping Station in east London. The Project includes associated works at Beckton STW, Shad Thames Pumping Station and Bekesbourne Street.

The geographic layout of the Project and local authorities through which it passes is shown in Figure 1. The Project comprises: a. tunnels: i. a main tunnel which will capture and store combined sewage from CSOs along its route and transfer it to Abbey Mills Pumping Station, from where the Lee Tunnel will transfer it for treatment at Beckton Sewage Treatment Works ii. 11 connection tunnels, which will link flows from CSOs to the main tunnel. b. Worksites: i. five main tunnel Worksites (drive and/or reception sites) ii. 16 CSO Worksites iii. two System modification Worksites Thames Tideway Tunnel iv. works at Beckton Sewage Treatment works.

The Main Works West - Contract 405: all works from and including the Acton Storm Tanks shaft to and including the Carnwath Road Riverside shaft, as well as the Frogmore connection tunnel from Carnwath Road Riverside shaft to King George's Park shaft.

This works package is for the supply and construction of the 900mm diameter Syphon Main diversion (or sludge main, as labelled on the attached design drawings) including provision of suitable methodology and temporary works solutions to limit impacts on adjacent utilities at Acton Storm Tanks worksite, Thames Tideway West.

Supply and construction of the following:-

Acton Storm Tanks - Syphon Main and Rising Works as shown on the attached drawings.

Returned quotations will be evaluated by BMB JV's (BAM Nuttall, Morgan Sindall PLC & Balfour Beatty) Procurement team in conjunction with our design and engineering teams. Quotations will be evaluated based on; Cost Timeliness of return Adherence to and demonstration of understanding of the drawings and specifications provided at this point. Provision of accurate product specifications to accompany the quotation. Supplier experience of similar projects,evidence of this will be requested should the initial quotation be of interest. Should the candidate supplier be shortlisted they will then be contacted directly by a member of the BMB Procurement Team within two weeks of shortlisting to discuss the requirement in detail. BMB Joint Venture (BAM Nuttall, Morgan Sindall PLC & Balfour Beatty)