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Mott MacDonald wins super sewer work

Thames Tideway Tunnel

Mott MacDonald has secured a major design deal on London’s £4bn super sewer.

The consultant was appointed by the Costain, Vinci and Bachy Soletanche consortium delivering the eastern section of the Thames Tideway Tunnel.

The news follows Aecom’s appointment earlier this week as lead consultant for the central section of the mammoth scheme.

Mott MacDonald project director Michael Francis said: “It is fantastic to be involved in the creation of one of London’s most significant infrastructure projects.

“The east works package is the deepest section of the project with tunnels driven by slurry tunnel boring machines deep in the chalk up to 70m below the water table.

“The deep shafts are constructed using diaphragm walls and the complex hydraulic structures to divert flows require soil mixing ground treatment, secant piles and high quality concrete meeting the 120 years design life.”

Work on the super sewer is expected to start on site next year.

NCE reported earlier this month that Tideway chief executive Andy Mitchell had challenged the construction teams delivering the £4.2bn project to begin construction six months earlier than planned and commission the tunnel two years ahead of schedule.

 

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