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Super Sewer: Massive lid seals London’s tunnel

The installation of a 24-metre diameter and 1200-tonne concrete lid signifies the final step in the construction of London's Thames Tideway Tunnel, also known as the Super Sewer

London’s Thames Tideway Tunnel project, known as the “Super Sewer,” has reached a milestone with the completion of its underground construction.

The installation of a 24-metre diameter and 1200-tonne concrete lid at Abbey Mills Pumping Station marks the final step.

Sarens, a global heavy-lifting and engineering transport company, played a key role in this operation.

The tunnel, spanning 25 kilometres with a diameter of 7.2 metres, aims to reduce sewage pollution in central London’s River Thames.

Once operational in 2025, it’s expected to minimise annual storm sewage spillage.

The project, a joint venture involving Costain, Bachy Soletanche and Vinci under Tideway, has been ongoing for eight years.

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