Corstorphine Road
Project Overview
We have installed 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 and was completed in December 2025.
During delivery, Corstorphine Road was reduced to one lane under temporary traffic lights between Ormidale Terrace and Murrayfield Gardens.
At a Glance
- To prevent sewer related debris entering the Water of Leith
- £3million investment
- Delivered by Caledonia Water Alliance
- Completed December 2025
Reduced to one lane
Corstorphine Road was reduced to one lane under temporary traffic lights
What We Are Doing
New screens and spill chambers have been installed to our storm overflow underneath Corstorphine Road at Ormidale Terrace.
The existing spill pipe and outfall was retained.
When excess rainwater is discharged, the new screens ensure any sewer related debris does not end up in the Water of Leith.
Road users were advised to allow extra time for journeys
Traffic management allowed 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 - December 2025
Work has been completed and final reinstatement of the carriageway on Corstorphine Road carried out, with all traffic management removed on Friday 19 December 2025.
We would like to extend our thanks to the local community for their patience and understanding.
This project and the £500million additional investment we are making in Improving Urban Waters will make a real difference protecting our rivers, helping to create a cleaner, healthier environment for everyone.
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
