About Tideway
Tideway is the company delivering the Thames Tideway Tunnel. It is owned by a consortium of investors, and more than two million pensioners have an indirect investment in Tideway through UK pension funds managed by those investors.
More than 400 highly experienced professionals are employed by Tideway to deliver the project, working alongside the company’s four main delivery partners.
Preparatory work on the project began in 2015 and construction is now underway at each of our 24 sites in London. The project is anticipated to be completed in 2025.
The tunnel will cost £4.6bn to complete. The cost of the project is being paid for by Thames Water’s 15 million wastewater customers through their bills, which will rise by no more than £25 per year.
The organisation
Tideway (Bazalgette Tunnel Limited) is the company financing, building, maintaining and operating the Thames Tideway Tunnel.
The company is owned by a consortium of investors that comprises Allianz, Amber Infrastructure, and Dalmore Capital. Our investors have extensive experience of investing in and managing a wide range of infrastructure assets in the UK and overseas. Three million pensioners have an indirect investment in Tideway through UK pension funds managed by our investors. The consortium's backing fulfils a key component of the HM Treasury's National Infrastructure Plan, designed to finance the development of UK infrastructure with the support of highly experienced private investors.
Tideway employs more than 400 highly experienced professionals to deliver the project, together with its four main delivery partners: The construction in the west region is being delivered by a joint venture of BAM Nuttall Ltd, Morgan Sindall Plc and Balfour Beatty Group Limited. This contract is known as Tideway West, with work taking place from Acton to Fulham.
The construction in the central region is being delivered by a joint venture of Ferrovial Agroman UK Ltd and Laing O'Rourke Construction. This contract is known as Tideway Central, with work taking place from Fulham to Blackfriars.
The construction in the east region is being delivered by a joint venture of Costain Ltd., Vinci Construction Grands Projets and Bachy Soletanche. This contract is known as Tideway East, with work taking place from Bermondsey to Stratford.
Finally, the System Integration contract has been awarded to infrastructure support service provider, Amey. Amey is responsible for providing process control, communication equipment and software systems for operation, maintenance and reporting across the Thames Tideway Tunnel system.
Preparatory works on the sites across London started in 2015, and main construction started at the three main hub sites in 2016. You can find out more about the construction progress here: Tideway construction sites. Work is anticipated to be completed by 2025.
Our Delivery Partners
Thames Water is the UK's largest water and wastewater services company. Every day, it supplies around 2.6 million litres of tap water to nine million customers across London and the Thames Valley. It also removes and treats more than four billion litres of sewage for 15 million customers.
Thames Water's wastewater customers are paying for the Thames Tideway Tunnel through their bills, with the process for setting customer bills determined by Ofwat. Once completed, Thames Water will operate the tunnel as an integral part of the London sewerage network, while Tideway will be responsible for its day-to-day maintenance.
Average annual household bills will rise by no more than £25 a year as a result of the project, before inflation.
£1.1 billion of the Thames Tideway Tunnel's construction cost is being funded directly by Thames Water.
West section
Joint venture of BAM Nuttall, Morgan Sindall and Balfour Beatty Group
Central section
Joint venture of Ferrovial Agroman UK and Laing O’Rourke Construction
East section
Joint venture of Costain, Vinci Construction Grands Projets and Bachy Soletanche
Sytems Integrator
Amey is responsible for providing process control, communication equipment and software systems for operation, maintenance and reporting across the Thames Tideway Tunnel system.