Project Description

London's network of sewers was built in 1858 foreseeing a population of 4 million, but with a population of 9 million today, although in perfect condition, lacks the capacity to meet the demands of modern-day London. As a result, millions of tons of untreated sewage overflows the system and spills into the Thames each year, affecting the ecosystem of the river and London itself.
As a result, Tideway is upgrading London's sewer system to cope with its growing population. By intercepting, storing and transferring the sewage before it enters the river, the 25 km tunnel will help prevent the tidal River Thames from being polluted.

The project has been divided into three sections: East; Central; and West. All tunnels will be created using Tunnel Boring Machines (TBM). PBE Rutherford was awarded the contract for the Central's temporary electrical works with Ferrovial / Laing O’Rourke JV. They have limited equipment available that would be suitable for these works, which is the largest section on the project with 12.7km of tunnels. Our previous work with them on the Northern Line Extension project has created a positive working relationship.

The scope of work includes containerized substations & switchrooms, isolation transformers, compact tunnel substations, testing & commissioning, and ongoing maintenance.


London UK


Thames Tideway

Main consultant

Ferrovial / Laing O’Rourke JV

Year of completion



Tunnelling - Utilities

PBE Rutherford was awarded the contract for the Thames Tideway's temporary electrical works