Name and Location
Thames Tideway Tunnel – East tunnel project, UK.

Client
Tideway.

Project Description
Tideway is delivering the biggest infrastructure project ever undertaken by the UK water industry. The East works package is one of three making up the Thames Tideway Tunnel, a major new sewer, urgently needed to protect the tidal river Thames from millions of tonnes of untreated sewage being discharged into the river and to modernise London’s Victorian sewerage network for the twenty-first century. The project will result in 25 km of tunnels being built beneath London. The East tunnel package includes the construction of a 5.5 km section of the main 25km tunnel and a 4.6 km connecting tunnel for combined rainwater and wastewater – both of which will serve the east of London.

Located between 45 m and 65 m below ground, the two tunnels will be excavated by tunnel boring machines using slurry pressure balance technology. The main tunnel will have an interior diameter of 7.2 m, while the diameter of the connecting tunnel will be 5 m.

The East section also includes the construction of five large shafts.

Value
The contract for the East works package is valued at £605-million.

Duration
Not stated.

Latest Developments
Mott MacDonald is designing the eastern section of the Thames tideway tunnel on behalf of the Costain, VINCI Construction Grands Projets and Bachy Soletanche joint venture (JV). An optimisation phase, which includes design and methods, is almost complete and the design team are delivering the first conceptual designs using state-of-the-art building information modelling models and processes.

Key Contracts and Suppliers
The Costain, VINCI Construction Grands Projets and Bachy Soletanche JV and Mott MacDonald (design – East tunnel).

On Budget and on Time?
Not stated.

Contact Details for Project Information
Tideway corporate communications manager Natalie Wheble, tel +44 778 922 8900 or email natalie.wheble@tideway.london.
Costain communications director Graham Read, tel +44 1628 842 444 or email graham.read@costain.com.
VINCI Construction Grands Projets, tel +33 1 47 16 47 00 or fax +33 1 47 16 33 60.
Bachy Soletanche, tel +44 1704 895686 or fax +44 1704 895581.
Mott MacDonald press office media relations manager Tom Smith, tel +44 20 8774 2205 or email tom.smith@mottmac.com.