The redevelopment of the former Bangour Village Hospital site required a new roundabout at the A89 entrance to support access to the wider development of approximately 1,000 homes, commercial units and a school.
To accommodate the works, two existing 12-inch cast-iron trunk water mains needed to be diverted. These mains form part of the critical infrastructure supplying potable water across West Lothian and the surrounding region.
We were appointed to deliver the diversion design, from initial surveys and utility investigations, through to route development and stakeholder approvals. Our team assessed potential conflicts with existing services, including a medium-pressure gas main, investigated land ownership and worked closely with Scottish Water’s Asset Impact Team and other stakeholders to agree a coordinated solution.
The final design comprised two 300mm wrapped ductile iron mains, each approximately 280 meters long. Given the importance of maintaining the existing water supply, the scheme incorporated specialist under-pressure connections and line-stop installations, allowing the diversion works to be undertaken without interrupting normal operation of the mains.
Through close collaboration with the client, contractor, Scottish Water and other stakeholders, Petrie Buchanan developed a robust, buildable solution that protected a critical water supply while enabling the wider development to progress.
Key Features
- Diversion of two existing 12-inch cast-iron trunk water mains.
- Design of two 300mm wrapped ductile iron mains, each approximately 280 meters long.
- Specialist under-pressure connections and line-stop installations.
- Water supply continuity maintained through the diversion process.
Client: Ambassador Group
Cost: £600,000
Dates: 2019-2021