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Thames Tideway Tunnel


We are upgrading London’s 150-year old sewer system to meet the needs of the capital’s growing population.

The Thames Tideway Tunnel is the biggest infrastructure project in the UK to be undertaken by the water industry. It’s due to be finished by 2024.

London currently relies on a sewer system built for less than half its nine million population. Every year, millions of tonnes of raw sewage overspills into the River Thames, harming the river and its wildlife.

The new 25km ‘super sewer’ will intercept, store and transfer sewage away from the river, travelling through London at depths of 30 to 60 metres.

We’ll use six tunnel boring machines to build the tunnel, excavating up to eight metres per day.

The project has been divided into three sections. We are working with Morgan Sindall and Balfour Beatty (BMB JV) on the West section, known as Tideway West, taking place from Acton to Fulham.

Digital Construction

We’re using 3D design models throughout the build, and we’re one of the first companies to have a Fulmax virtual reality cube on site. Using this, site operatives can view digital models in progress, and provide their own input to improve the build.

Field 360 On IPad

We are among the first construction companies to use Field 360 on iPad. This allows our mechanical and electrical engineers to complete on-site maintenance work entirely digitally.

Tunnel Rings

We are using the first non-bolted tunnel rings in the UK, which protects our team from HAVS (Hand Arm Vibration Syndrome).

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