Corstorphine Road
Project Overview
We are installing new screens and spill chambers to a storm overflow under Corstorphine Road to help prevent sewer related debris from entering the Water of Leith.
The project is part of our £500m Improving Urban Waters programme.
Work began at the beginning of June 2025 for approximately six months.
During delivery, Corstorphine Road is reduced to one lane under temporary traffic lights between Ormidale Terrace and Murrayfield Gardens.
At a Glance
- To prevent sewer debris entering the Water of Leith
- Enhancing the aesthetic and natural water environment
- Delivered by Caledonia Water Alliance
- Work began in June 2025
Reduced to one lane
Corstorphine Road has been reduced to one lane under temporary traffic lights
What We Are Doing
New screens and spill chambers are being installed to our storm overflow underneath Corstorphine Road at Ormidale Terrace.
The existing spill pipe and outfall will be retained.
When excess rainwater is discharged, the new screens will ensure any sewer related debris does not end up in the Water of Leith.
Road users are being advised to allow extra time for journeys
The traffic management allows the work to be carried out safely
Why We Are Doing It
Working closely with the Scottish Environment Protection Agency (SEPA) Scottish Water has identified priority storm overflows for improvement or replacement for water quality or aesthetic – sewer related debris – reasons.
Under the banner ‘Draining the Rain, Enhancing the Environment’ the investment will help prevent sewer related debris such as wet wipes from entering the environment during periods of rainfall.
Water of Leith
The project will help prevent sewer related debris such as wet wipes from entering the watercourse.
Latest Update - October 2025
Work has been progressing well despite challenging ground conditions with the new overflow chamber constructed underneath the carriageway of Corstorphine Road.
A 20-tonne concrete lid was installed using a giant crane marking an important milestone.
The project remains on course for completion by early December 2025.
We thank you for your patience and understanding.
The concrete lid for the overflow chamber arrives on site
Traffic was halted while the lid was swung into position
Community Engagement
We held a drop-in public information event at the Murrayfield Hotel in early May 2025 where members of the project team were available to explain more about the work involved and to take on board any concerns or questions from the community.
An information event was held at a local hotel
Details of the project were made available
