Chelsea Embankment Foreshore

At Chelsea Embankment Foreshore, we are working across two sites, known as the ‘north’ and ‘south’ sites.

Our south site is located on the foreshore where we have constructed a cofferdam, a dry working area built out into the river. Within this cofferdam we have excavated a 45m-deep shaft, which will drop raw intercepted sewage to the depth of the new super sewer.

From the base of this shaft, we have constructed a 55m-long tunnel to connect the site to the main super sewer tunnel being constructed deep below the River Thames. We are currently installing the concrete secondary lining on top of the primary lining within this connection tunnel. The secondary lining will protect the structure against erosion as sewage passes through it.

We have also excavated an interception chamber, a structure that will intercept, combine and transport sewage from the existing sewers towards our shaft. We have poured a concrete base slab to the bottom of this structure to secure it and give it its final shape.

We have been installing metal sheet piles deep into the ground within our cofferdam. The sheet piles will form the outline of our de-aeration chamber which will be used to which extract gasses within the sewer system and will form part of the infrastructure servicing the new super sewer. We will be using a combination of the vibro and impact methods to insert the piles.

On our north site – across the road from our south site - we have completed excavation of our 23m-deep overflow weir chamber. This chamber will receive the sewage that overflows from the Low Level 1 sewer and direct it towards our shaft on our south site via a connection culvert tunnel, which is yet to be constructed.

If you have any questions about this or our site at Chelsea Embankment Foreshore please get in touch with our helpdesk on 08000 30 80 80 or [email protected]

Standard Working Hours

08:00 - 18:00 Monday - Friday

08:00 - 13:00 Saturday

There is a mobilisaiton period of up to one hour both before and after the working hours plus maintenance periods on Saturday 1-5pm and Sundays 10am-4pm.

Extended Working Hours

We are currently working 24hrs Monday to Friday and 08:00-13:00 on Saturdays

If you'd like to join our next community meeting or speak to one of our team, please get in touch via email at [email protected]. Due to current restrictions, all of our community meetings are currently being hosted online. 

• All static machinery and plant is screened or enclosed
• Hoarding has been erected on the site boundaries for both the north and the south site
• Vehicle movements outside of standard hours is restricted
• Use of low level directional lighting
• The excavated material handling area is enclosed
• Two-way traffic flow along Chelsea Embankment has been maintained
• Public access to important events, such as Chelsea Flower Show and Masterpiece events, will be maintained throughout construction
• Footpath diversions are clearly signposted

There are lots of ways to find out what’s happening at this site, you can:

• Call our 24 hour Tideway Helpdesk 08000 30 80 80 or email [email protected]
• Take a moment to read the latest updates on the noticeboards on our hoardings.
• Email our dedicated Community Relations teams available to answer your questions or meet with you, via [email protected]
• Join our regular Community Liaison Working Group meetings, to attend the meetings or receive the minutes and presentations from past meetings, email [email protected].

If you call our helpdesk you may notice a slight change as we have a new team providing this service, please note that our contact details have not changed so you can continue to get in touch with us in the usual way by calling 08000 30 80 80 or emailing [email protected]

You can also follow our progress and what we're doing in our local communities on Twitter, Instagram and Facebook