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Data updates will be published regularly via a new tracker at
www.tideway.london
work then completed in the spring of 2024.
The Tideway project is being delivered by an alliance of contractors. The west region is being delivered by a joint venture of BAM Nuttall, Morgan Sindall Infrastructure and Balfour Beatty. The central region is being delivered by a joint venture of Ferrovial Agroman UK and Laing O'Rourke. The east region is being delivered by a joint venture of Costain, Vinci Construction Grands Projets and Bachy Soletanche.
System integration is being delivered by Amey, which is responsible for providing process control, communication equipment and software systems for operation, maintenance and reporting across the Thames Tideway Tunnel system.
The project is on track to be fully complete (with testing complete) later this year. Thames Water will then operate the system, as part of its London wastewater network.
Steve Reed, Environment Secretary said:
“This Government is determined to clean up our polluted rivers, lakes and seas – and that includes the capital’s iconic Thames river.
“The Thames Tideway Tunnel is an example of the kind of infrastructure investment needed to clean up our waterways around the country and builds on this government’s wider ambition to boost national infrastructure under the Plan for Change.
“Just 70 days after the election, we introduced the Water (Special Measures) Bill to ban bonuses for failing firms and
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hold bosses criminally liable. We’ve also launched the largest water sector review since privatisation to boost investability into the sector and speed up the building of infrastructure.”
Mayor of London, Sadiq Khan said:
“This is an important milestone, which will mean a huge reduction in sewage going into the tidal Thames. We must now build on this work to go further and tackle the other sources of pollution damaging London’s waterways. I’m determined to make our rivers cleaner, safer and more accessible so that Londoners can enjoy the benefits of nature as we continue to build a greener and better city for all.”
Chris Weston, Thames Water CEO said:
"London’s Victorian sewer system was built for four million people but today, it serves over nine million. The final connection of the Thames Tideway Tunnel to our network is a major milestone in a three-stage programme to help London's wastewater system cope with a growing population and the impact of climate change.
"This infrastructure project, funded by Thames Water customers, will reduce sewage discharges into the Thames and create lasting benefits for biodiversity, recreation and public health. We know there is still much more to do so our focus now turns to the next phase of our work to continue cleaning up London’s rivers and watercourses.
The Environment Agency’s Chair, Alan Lovell said:
“Today marks a very important milestone for the wildlife and water quality of the
| March 2025 |
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Thames, as well as the people that live, visit and work in our capital city.
“As environmental regulator and advisor, the Environment Agency is proud to have worked collaboratively with partners on the delivery of the Tideway project every step of the way, from its conception to construction and ongoing regulation of sewage spills into the Thames estuary – which will be reduced by around 95% through the combined London Tideway Improvements.
“This project will markedly improve the river for wildlife and for the people around it. We will continue to monitor water quality and aquatic life in London’s iconic river as part of our robust regulation of the water industry.”
David Black, Chief Executive of Ofwat said:
"This is an historic moment in the development of London's infrastructure – and we are proud to have worked with partners on the development, oversight and delivery of this scheme. The project demonstrates how the use of competitive models for delivery and innovation in finance arrangements can achieve good outcomes for customers and the environment alike.
"As Tideway moves towards full completion, we are already planning for the future and creating the foundations for future economic growth. By optimising our innovative regulatory models, including learnings from Tideway's financing structure, we will unlock investment for the next generation of major water and wastewater infrastructure projects."
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