Three consortia of a list of prequalified groups have been shortlisted by Transport for London (TfL) to design, finance, build and maintain the new twin-bore Silvertown road tunnel under the River Thames to the east of London.
The groups are led by:
Following a call for prequalification for the coveted new project in June 2016, 10 teams were announced as vying for the PPP contract. Teams announced at the time included:
TBM excavation has been specified for the river crossing as opposed to a bridge or immersed tube structure and a twin bore rather than a single large diameter double deck tunnel is also favoured by the client and its consultants.
Construction of the new tunnel would begin in 2019, subject to final planning approval by UK Secretary of State for Transport, and meet a projected opening in 2023. The new highway crossing is required to help ease current chronic peak traffic congestion at the existing Blackwall road tunnel crossing and also at the Dartford bridge and tunnel crossing further down river on the M25 London orbital motorway.
Under the terms of the proposed contract, the contractors of the winning consortium will be required to deliver a range of measures to reduce construction impacts such as:
A six month planning review into the plans for the tunnel is currently underway and a decision is expected by the Secretary of State in Autumn 2017. Confirmation of the successful bidder will be made following this decision.
The scheme will be privately financed through a design, finance, build, and maintain (DBFM) contract with the successful delivery partner receiving payments from TfL once the tunnel is open and available for use.