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Restoring Barmouth Viaduct

We’re upgrading the iconic Barmouth Viaduct

We are carrying out the biggest restoration of Barmouth Viaduct in its history. Our £30m upgrade will protect the well-loved bridge for generations and maintain its magnificent appearance.

Barmouth Viaduct closures

There are no further planned temporary closures until we carry out phase three of our work – the replacement of the viaduct’s metallic elements.

During the final phase of work, we will need to close the viaduct completely to rail traffic, pedestrians and cyclists.

We are sorry for any disruption our work will cause, but there is simply no safe way to carry out the restoration without closing Barmouth Viaduct and the adjoining walkway. Thanks for your patience throughout our work.

What the work will involve

At over 150 years old, the viaduct is in poor condition. Many of the timber elements of the viaduct have decayed significantly over time and a large proportion of the metallic elements have corroded.

Our programme will see us completely restoring the viaduct in a way that doesn’t threaten its industrial heritage and its Grade II* listed status. This means that we will replace its components on a ‘like-for like’ basis so that it retains its magnificent appearance. We will be carrying out additional work during our £30m restoration to the iconic landmark, including replacing all the timber main beams.

To reduce the impact of our work, we’ve carefully planned for it to take place over three years.

Passenger disruption

During our final phase of work, our colleagues at Transport for Wales will be providing rail replacement services between Pwllheli and Machynlleth stations, and all stations in between.

Our advice for passengers, pedestrians and cyclists is to plan ahead and allow additional time for travelling. We’ve worked closely with Cadw, Gwynedd County Council and other stakeholders over a number of years to develop and agree our plans. For further information about our work, please download our frequently asked questions:

Get in touch

If you have any additional questions or concerns about this work, please call our dedicated 24-hour national helpline on: 03457 11 41 41 or email

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