Aecom’s client is the delivery partner for the central section, a joint venture of Ferrovial Agroman and Laing O’Rourke.
Construction of the £4.2bn super-sewer is divided into three sections: west, central and east. The west section is to be built by a JV of BAM Nuttall, Morgan Sindall and Balfour Beatty while the east section is in the hands of the Costain/Vinci/Bachy Soletanche JV.
The entire 25km sewer tunnel generally follows the route of the River Thames, starting in west London and travelling to Limehouse, where it then continues north-east to Abbey Mills Pumping Station near Stratford. There it connects to the Lee Tunnel, which will transfer the sewage to Beckton Sewage Treatment Works.
Aecom will deliver design services for the 12km (7.5 mile) central section of the tunnel from Carnwath Road in Fulham to Chambers Wharf in Bermondsey, the largest section on the route. The hub for tunnelling activity will focus around the Kirtling Street shaft in Battersea, where both the east and west tunnelling machines will be launched.
Aecom also delivered design consultancy services for the Lee Tunnel project, which is currently under construction and set to be completed in 2016.
The central section of the tunnel will pass through a variety of different ground conditions, including London Clay, Lambeth Group, Thanet Sands and Chalk. It will be built under London’s existing underground infrastructure, close to tube lines and utilities.
Steve Woodrow, Aecom’s head of tunnels, Europe, said: “Tideway is one of the UK’s most important new infrastructure projects, which will dramatically improve the water quality of the River Thames and give London a wastewater system it can rely on. Aecom’s tunnelling team brings its recent experience delivering the Lee Tunnel to this key civil engineering project.”
Peter Main, project director for the Ferrovial Agroman, Laing O’Rourke JV, said: “The central section of Tideway is a major feat of engineering and Aecom brings valuable expertise in tunnelling design services that will enhance and strengthen our delivery team.”
Aecom is now working with the Ferrovial Agroman, Laing O’Rourke JV to deliver the detailed designs for the central section. Construction is on course to start in 2016 and the project is expected to be completed in 2023.