Thames Tideway Tunnel - C405 Main Works West - Carnwath Road Pit Bottom Steel Alterations

Description

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. Scope of Works BMB JV requires a subcontractor to supply and install up to eight pit bottom decks that will be used to hold equipment required for the secondary lining of the main tunnel. All modules will be assembled by the subcontractor at the Carnwath Road main site in an assigned working area. The subcontractor will need to make allowance for working amongst others. BMB will lift the modules into the shaft with supervision and assistance of the subcontractor. The Subcontractor will then install each module into its required position at the bottom of the shaft. All personnel must be EPIC on-boarded as per Tideway induction procedure and have completed an on site-specific induction. BMB will provide access to the shaft bottom. All programme dates are subject to change: Delivery of steel required for assembly of modules 1-4 by 14 Sept 2020. Installation for modules 5 and 6 begins in the shaft mid July 2021. Installation for modules 7 and 8 will be based on the production of the secondary lining the earliest being late 2021 and latest March 2022. 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) BMB-JV Tideway West, Carnwath Road Riverside, Carnwath Road, London Borough of Hammersmith & Fulham, SW6 3HR