The Thames Tideway Tunnel

The Thames Tideway Tunnel is the biggest privately financed infrastructure project in Europe, and when completed, will substantially reduce the millions of tons of untreated sewage that currently overflows from London’s Victorian sewers into the tidal River Thames.
As the largest project ever undertaken in the UK water industry, the 25km tunnel will be 7.2 metres in diameter and reach depths of up to 65 metres. Construction on the project started in 2016 and involves 24 work sites across London. Work on the construction has recently reached the mid-way milestone and we currently have four tunnel boring machines cutting their way under the capital city. The project will be completed and commissioned by 2024.
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