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ARTICLE · 28 MARCH 2013

The Thames Tideway Tunnel

Its main purpose is to stop sewer outfalls along the Thames discharging into the river when they overflow (usually during heavy rain), and to discharge into the sewer instead. 57 sewer outfalls do this, and the tunnel will address the 34 worst of these.

United KingdomGovernment, Public Sector

WHAT IS THE THAMES TIDEWAY TUNNEL?

Its main purpose is to stop sewer outfalls along the Thames discharging into the river when they overflow (usually during heavy rain), and to discharge into the sewer instead. 57 sewer outfalls do this, and the tunnel will address the 34 worst of these.

The main tunnel will run under the Thames from Hammersmith to Rotherhithe, veering north via the Limehouse Cut and terminating at the Abbey Mills Pumping Station near Stratford. It is to be 7.2 metres in diameter and run from 30 metres below the river in the west to 65 metres below in the east.

Connecting tunnels will run from the main tunnel to existing sewer outfalls along the banks of the Thames and further inland. There will be construction sites and additional permanent infrastructure at 21 of these sites, some involving structures built into the river.

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