Mega Construction Projects: Thames Tideway Tunnel

A 15-mile-long sewer, the width of three London buses, running beneath the River Thames in London is currently under construction.

The tunnel will capture millions of tonnes of sewage which would otherwise overflow into the river from the capital’s overloaded sewer system. This huge project will be completed by 2023.

Watch the construction process in this short animation.

Video supplied with kind permission from Thames Water.