We are planning a new section of the A487 north of Machynlleth, including a new bridge across the River Dyfi.

First published:
19 May 2017
Last updated:


Project status: planned
Start date: autumn / winter 2019 if a public inquiry is not required 
Road open: summer 2022
Early contractor involvement contract: Alun Griffiths (Contracting) Ltd

Why we are doing it

The Pont-ar-Ddyfi was not designed to carry the current volume of traffic, and so is a pinch point on the A487. The road is also often closed due to frequent flooding causing traffic to take a diversion of up to 30 miles.

The existing bridge is Grade II* listed and a Scheduled Ancient Monument so we are restricted in what alterations we can make.

Our objectives are to:

  • improve the reliability of crossing the River Dyfi
  • improve access to key services including employment opportunities, healthcare and education
  • ensure Machynlleth remains a vibrant and sustainable local centre
  • preserve the long-term integrity of Pont-ar-Ddyfi
  • reduce the number and severity of collisions on the A487
  • ensure the flood risk is not increased
  • increase safe and reliable, walking and cycling opportunities.

We will minimize the impact of these improvements on the landscape, biodiversity, water resources and heritage of the area.

Current progress

We have undertaken studies which have considered both improvements to the existing road and bridge, and also the option of constructing a new road and bridge off the line of the existing road.

If the Pont-ar-Ddyfi were to remain part of the A487 we would need to strengthen and widen the bridge, which would significantly change the historic bridge and cause major disruptions during the works.

We found from the studies that a new road crossing the river upstream of the existing bridge was a better solution.

We are in the early stages of designing and undertaking environmental assessments.

A public information exhibition was held on 7 October 2015. 

The plan

We plan to build a new single carriageway road joining the existing A487 south east of Pont-ar-Ddyfi. The new road would cross the River Dyfi approximately 480m upstream of the existing bridge. This new stretch of road would become the A487, with the existing road north of the bridge becoming the A493. The A493 and the existing A487 south of the Pont-ar-Ddyfi would no longer be a Welsh Government maintained trunk road and so would be maintained by local authorities.


Publication of draft orders and environmental statement: autumn 2017
Orders exhibition: autumn 2017
Start date: autumn / winter 2019 if a public inquiry is not required
Road open: summer 2022

Next steps

We are currently considering comments made by statutory and non statutory stakeholders. These comments will help better inform us on how we should progress this scheme and whether we will be required to organise a public local inquiry.

If you have any concerns or questions, contact Mandy Evans on 0330 041 2185 or email mandy.evans@alungriffiths.co.uk