North Bridge Refurbishment, Edinburgh

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The £86 million North Bridge Refurbishment is protecting a key transport link between Edinburgh’s Old and New Towns, while extending the life of one of the city’s historic landmarks. Delivered over eight years, the project combines heritage restoration with digital innovation and a focus on long-term performance to modernise the 130-year-old structure and prepare it for the future.

Built by Sir William Arrol & Co in the 1890s, the Category A Listed bridge sits within a UNESCO World Heritage Site and carries the A7 over Waverley Station, which serves 23 million passengers each year.

In 2014, incidents of concrete and cast iron falling from the bridge led to investigations that revealed its condition was worse than expected. Although demolition and replacement were considered, the City of Edinburgh Council, AtkinsRéalis and Balfour Beatty worked together through the SCAPE Civil Engineering Framework to find a way to refurbish the bridge rather than replace it.

North Bridge, Edinburgh

Preserving the past, preparing for the future

Repair was prioritised over replacement wherever possible, retaining significant elements of the original structure while reducing material consumption, waste, embodied carbon and whole-life costs.

The bridge has also been prepared for the future. It has been strengthened to take the loading of future trams, with inclusive pedestrian crossing points and modern lighting, while preserving its historic character.

Digital technology is helping to support the bridge’s long-term management. Embedded concrete sensors, corrosion and structural health monitoring, together with a digital twin, will help the team better understand the bridge’s condition and performance. A 60,000-component permanent access platform integrated within the Victorian structure also makes future inspection and maintenance safer and easier.

Corroded steel beams

Tackling a complex engineering challenge

Working above a live railway station, operational roads and busy pedestrian routes created significant engineering and logistical challenges. A fully suspended scaffold system enabled major structural works above operational rail infrastructure, while specialist cast iron repair and recasting techniques helped safeguard irreplaceable heritage elements.

As unforeseen defects emerged, the client, designers, contractor and specialist supply chain worked as one integrated team, identifying issues early, agreeing solutions and keeping work moving.

Safety remained central throughout. Specialist inspections, rigorous risk management and workforce engagement helped the project achieve more than 1,000 days without a Lost Time Incident.

This project has demonstrated exceptional teamwork and problem-solving... Faced with the complexities of restoring a 130-year-old bridge, the team successfully managed unforeseen challenges and delivered the project while respecting its technical, social, and heritage significance.

Jonathan James

Engineer and Client Representative (Structures), City of Edinburgh Council

Creating value beyond the bridge

The project’s impact extends beyond the bridge itself. More than 2,900 school pupils and 420 college and university students have been engaged through educational programmes, site visits, careers events and hands-on learning. Apprenticeships, graduate placements and work experience opportunities totalled 2,761 weeks.

More than 1,000 volunteer hours and over £35,000 in charitable donations and in-kind support have also contributed to local organisations and communities.

North Bridge shows how thoughtful refurbishment can give historic infrastructure a new lease of life. By combining engineering expertise, digital innovation and close collaboration, the project is helping to preserve an important part of Edinburgh while preparing it for the future.

North Bridge is a landmark achievement in asset management and shows what’s possible when we look at how we can extend the life of existing infrastructure rather than simply replace it.

Barry Lennie

Client Framework Director, AtkinsRéalis

Key facts

4,000 engineers involved

More than 1,000 days without a Lost Time Incident

2,900+ school pupils

engaged through educational activities

2,761 weeks

of apprenticeships, placements and work experience

Markets

Transportation
Services

Consulting, strategy & advisory

Operations & maintenance

Project & program management
Location

UK
Client

City of Edinburgh Council
Collaborators

Balfour Beatty