Stamford BrookResidents' Association


Tideway Tunnel /Super Sewer

Work has now started at the Acton Storm Tanks site between Larden Road and roads to the north of Bedford Park. The work is planned to take four years. The tunnelling will start from the Carnwarth Road site near Hurlingham and the tunnelling machine will work towards the north west end of the tunnel, which will be at the Acton Storm tanks. All the spoil from the tunnel will be taken back down the tunnel and loaded onto barges on the river. The work at the Storm Tanks involves building a very large shaft down  to what will be the end of the tunnel , big enough to extract the tunnelling machine. Storm Tanks 5 and 6 are being emptied and will be removed as part of the construction work. Eventually tanks 3 and 4 will be covered over and tanks 1 and 2 will remain to be used only in the very unlikely event of the tunnel becoming full. There will also be a 15m high ventilation shaft.

The project is to prevent the 50 discharges a year into the Thames caused by heavy rainfall which mixes with sewage in the sewers and is too much for the existing sewers and overflow systems and so has to be discharged into the river. 57 connecting points are being created over the full length of the tunnel , from which existing sewers can overflow into the Tideway Tunnel, which will act as a storage tank to hold the overflow until it can be released and processed at works in East London. It is expected that there may still be 3 or 4 overflows a year into the Thames, but none in our area. The tunnel will have a useful life of 120 years.

There will be a ten year major maintenance interval with minor maintenance every six months. Once the tunnel is built there will be very little traffic or noise. During the construction period , however, there will be noise from the work, which is only allowed between 8am and 6pm Monday to Friday and 8am to 1pm on Saturdays. All heavy vehicles must access the site through roads to the north of the site, from Uxbridge Raod and The Vale, and none are permitted to use Emlyn Road.

Thames Water and its partners, operating under the name of Tideway, have a helpline and a website. We can sign up to receive regular email updates if wished. The helpline is 08000308080. The website is and the Community Relations Officer is Vic Chetty whose email is This email address is being protected from spambots. You need JavaScript enabled to view it. and his phone number is 07966525837. They are keen to involve the community and so we should feel free to contact them with any concerns.

John Trotter

Chair SBRA



Published on January 01