Skip to main content
Start of main content

Innovative keyhole engineering of the KSP Sewer saves money, reduces carbon and keeps both London moving and the sewer flowing

King’s Scholars Pond Sewer Rehabilitation

The KSP Sewer, buried beneath one of the busiest intersections in London, and above one of London Underground’s live tunnels, was found to be showing significant distress during a routine inspection. In addition to severe deterioration, the 170-year-old structure was found to have settled by 166mm from the original constructed level thereby encroaching into the kinematic envelope of the trains below.

The KSP sewer was built between 1848-1856, seven years before the first section of the London Underground. The two structures intersect near Baker Street tube station. At this location, the sewer is supported by a bridge structure spanning between the walls of the underground tunnel. Closing the tube line to repair the sewer from below would be extremely expensive whilst closing the busy road intersection to repair from above would cause major disruption to the public.

Our team worked closely with Thames Water and Stakeholders to develop an innovative solution to extend the asset life of the sewer structure by 120 years. The team’s solution involved strengthening the sewer from the inside, eliminating all disruption to the public. The design and construction of this massive jigsaw puzzle demonstrated exceptional project execution with every component fitting together with millimetre precision.

Baker Street Sewer Project

Thames Water's eight2O alliance is using innovative engineering techniques to upgrade a brick-built Victorian sewer above Baker Street tube station with steel, while keeping London flowing.

Related Projects

Fellgate Surface Water Management Solution

Tyneside, United Kingdom

Durleigh Water Treatment Centre Refurbishment

Somerset, United Kingdom

Abberton Reservoir Scheme

Essex, United Kingdom

Scottish Water Bio-resources Strategy

Scotland

Durleigh Water Treatment Centre Refurbishment

Somerset, United Kingdom

A Natural Capital Assessment of Groundwater

Various, United Kingdom

SBAP Sludge Strategy at Davyhulme WWTW

Manchester, United Kingdom

Axford & Ogbourne WTWs Abstraction License Reduction Scheme

Swindon, United Kingdom

We’re better together

  • Become a client

    Partner with us today to change how tomorrow looks. You’re exactly what’s needed to help us make it happen in your community.

  • Design your career

    Work with passionate people who are experts in their field. Our teams love what they do and are driven by how their work makes an impact on the communities they serve.

End of main content
To top