Thames Water Bourton-on-the-Water Sewage Treatment Works

Through the Water Industry National Environment Programme, Thames Water is investing in Bourton-on-the-Water to strengthen treatment capacity and improve environmental performance across the catchment.

Thames Water needed a clear route through a challenging upgrade. The aim was simple – increase treatment capacity and storm resilience so the system works in the real world. As senior project manager, we guided the programme through the early stages, focused on unlocking progress.

Finding the right path through a complex site

The programme centres on two key locations: Bourton on the Water Sewage Treatment Works (STW) and the Sewage Pumping Station (SPS). As both sit in a sensitive landscape, they required careful planning, land agreements and technical utility coordination.

Our team brought together planning advice, utility know how and risk management. By mapping constraints early and agreeing the right actions at the right time, we kept the upgrade moving while protecting the budget and maintaining cost-effectiveness. It was a simple idea that made a big difference – one clear plan that everyone could follow.

Managing the project through detailed design

With so many interconnected workstreams, the programme needed clear coordination. We set up regular working sessions that brought the full team together. These helped resolve technical hurdles quickly and gave space for honest conversations about risks, site pressures and planning requirements.

Environmental considerations were central. The local surroundings, tight footprint and the need to maintain operations meant every decision had to be carefully thought through. By addressing these challenges early, we reduced surprises later and shaped a design that fits naturally into the site.

The upgrades focus on increased Flow to Full Treatment and stronger storm resilience, giving the system greater capacity during peak events.

Upgrades that strengthen performance for years to come

Once complete, the upgraded sites will increase hydraulic capacity and deliver stronger environmental outcomes. The improvements support Thames Water’s long-term objectives and help protect local waterways during heavy rainfall.

Our work gives Thames Water the clearest route to completion, even with the technical and environmental on-site challenges. As senior project manager we continue to guide decisions and reduce risk. The result will be a more resilient treatment system – one that serves local communities today and adapts to the pressures of tomorrow.

Futureproofing wastewater infrastructure

This programme is about more than new equipment. It is about protecting the local environment, improving day-to-day performance and preparing for rising demand. We are helping Thames Water build a treatment system that works for the long term – reliable, resilient and ready for what comes next.