Griffiths completes steelwork and deck construction on 46M Welsh … – New Civil Engineer

Steelwork and bridge deck construction are now complete on Griffiths' new Dyfi Bridge project in Wales.

Building work on the Welsh Government scheme began in spring 2021.

The site team are now working on the viaduct finishes, including deck waterproofing, parapets and combined kerbing installation.

Road surfacing, street lighting, and signage installation are also underway, ensuring safety and convenience for the travelling public. Griffiths is also working on drainage and scour protection to guarantee the bridges longevity.

The bridge is located on the A487 near Machynlleth in Wales. The existing 19th century Pont-ar-Ddyfi bridge was not designed to carry the current volume of traffic, and the road is often closed due to frequent flooding.

The scheme will see the A487 realigned away from the Pont-ar-Ddyfi bridge, a Grade II-listed and Scheduled Ancient Monument, and routed onto a new viaduct structure 480m upstream to reduce the pinch point.

As such, the project has been designed to improve road safety, strengthen links between communities, provide active travel opportunities and build resilience against flooding.

The bridge will make it easier to cross the River Dyfi and provide better access to employment opportunities, healthcare and education. In addition, it will make sure Machynlleth remains a vibrant centre of the community and preserve historic landmarks and buildings.

The new 725m long viaduct, with a 74m span over the River Dyfi itself, was designed by Arup for contractor Griffiths. Work to minimise the flood risk and impact on the river was undertaken with Wallingford HydroSolutions.

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Griffiths completes steelwork and deck construction on 46M Welsh ... - New Civil Engineer