Caledonia Water Alliance delivering flood alleviation measures in Edinburgh

Morrison Water Services, as part of the Caledonia Water Alliance (CWA), a joint venture between AECOM and Morrison Water Services, has been supporting Scottish Water to increase sewer network capacity and storage within the Marchmont area of Edinburgh, reducing the risk of flooding to businesses and residents.

Scottish Water is investing £8.9 million to strengthen the sewer network. In the heart of Scotland’s Capital city, Edinburgh, our team has been working to install 700m of new and upsized sewer along Marchmont Crescent and Marchmont Road.

The new storm tank will hold up to 3.5 million tonnes of storm water, allowing storm flows to fill the tank during heavy rainfall. The water is pumped back into the sewer network once the storm subsides and sewer levels are monitored in the downstream network. Future storm events are minimised with its capacity and durability.

Our team has used trenchless techniques to maintain access to properties and businesses..We arranged regular one-to-one discussions with local businesses throughout with pre and post condition surveys, offered to all residents. For effective communication, site hoarding was designed to include information about the project and the local history of Marchmont.

Colin Freeland, Project Manager at CWA, said: “We are pleased to be supporting Scottish Water with this important project,designed to strengthen the sewer network for increased capacity during heavy rainfall.

“Communication was key between us, our partners, and local communities to ensure minimal disruption with a 20m diameter storage tank being installed surrounded by parks, businesses and residential buildings.”

In our commitment to protecting the environments in which we work, we will seed the area around the tank with a wild meadow mix chosen by the Marchmont community once the project is completed, in addition to a new top-up tap, which has been placed in Meadows Park for park users to fill up their water bottles.

Back to all.