We built a new section of the A487 north of Machynlleth, including a new bridge across the River Dyfi.
Overview
Why we did it
The Pont-ar-Ddyfi bridge is over 200 years old, and was not designed to carry the current volume of traffic. The road was often closed due to frequent flooding, forcing drivers to take a diversion of up to 30 miles.
We wanted to:
- make it easier to cross the River Dyfi
- make it easier to access jobs, healthcare and education
- make sure people can still access Machynlleth even when there is heavy rain and flooding
- make the A487 safer
- help prevent flooding
- make it easier for people to walk, cycle and wheel across the bridge.
What we did
We built a new 1.2km single carriageway road joining the existing A487 south east of Pont-ar-Ddyfi bridge.
The new road crosses the River Dyfi approximately 480m upstream of the existing bridge.
The existing A487 south of the Pont-ar-Ddyfi bridge is no longer a Welsh Government road and will be maintained by local authorities.
Building work started in spring 2021, and ended in February 2024.
Work included:
- 1.2km single carriageway road starting at the northern edge of Machynlleth, crossing the Afon Dyfi flood plain, and re-joining the A487 to the south
- 2.5m wide shared use active travel path to encourage walking, cycling and wheeling over the new bridge
- flood bunds to protect the Dyfi Eco Park and road under railway
- emergency surface water pumping facilities which will limit flood water under the railway and Dyfi Cottages
- landscaping works, tree planting and returning the land under the viaduct to green fields
- utility service diversions preparations (e.g. gas, water, electric, broadband/phone lines etc.)
- all concrete and steelwork structure elements of the bridge
- complete drainage improvement works in front of Dyfi Cottages
- maintenance works on the old road before it was transferred to the care of the local authority