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A487 New Dyfi Bridge

Event organised by ICE

Date
21 March 2024
Time

This event has now ended

You can catch-up on details or any broadcast and downloads here.

Overview

This scheme comprises a new 1.2km long single carriageway road starting at the northern edge of Machynlleth and traversing the Afon Dyfi floodplain on a 724m long elevated viaduct over the floodplain of the Afon Dyfi and the river itself.

The viaduct comprises 20 spans of steel and concrete construction supported by pairs of circular reinforced concrete columns on piled foundations. A 400-metre length of steel girder viaduct complete with precast bridge deck units was “push" launched over the flood plain.

The Welsh Government awarded Griffiths the Early Contractor Involvement contract for the A487 New Dyfi Bridge scheme in June 2015. The Griffiths team included Arup as the designer. 

In January 2020 the scheme was given the go ahead by Welsh Government. Detailed design commenced in March 2020 followed by the construction phase in May 2021.

A brief introduction of the A487 New Dyfi Bridge scheme will be shared by a representative from the client, the Welsh Government.

A representative from the designer, Arup, will explain the design principles and some of the challenges they came across associated with the works.

A representative from Griffiths will explain how the works were planned to minimise working in the floodplain and avoiding potential environmental issues. The contractor will share the construction challenges and complexities that have been experienced. 

Speakers

Peris Jones

Peris Jones

Llywodraeth Cymru, Welsh Government

head of capital delivery

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Peris Jones

Peris is Chartered Civil Engineer and Fellow of the ICE and CIHT and has worked in various sectors of the civil engineering industry including renewable energy, marine, flood defence, water, and transport. He’s been delivering a variety of schemes for a contractor, consultants, and the last 17 years with the Welsh Government.

As the Head of Capital Delivery, Peris is responsible for leading teams to deliver major projects and maintenance schemes on the strategic road network in Wales. Peris’ involvement on this project began during the preliminary design and statutory process before delivering two advanced work packages and then the main construction works.

Darren Jones

Darren Jones

Arup

Chartered Civil and Structural Engineer

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Darren Jones

Darren is a chartered civil and structural engineer and Member of the Institution of Civil Engineers and Institution of Structural Engineers.

With over 30 years' experience, he has worked for Arup for the past 17 years and is currently leading complex bridge design, assessment and strengthening projects. He has worked in the UK, Australia, Abu Dhabi and Hong Kong. 

Darren was the structures lead for the A487 New Dyfi Bridge Project.

Mark Cooper

Mark Cooper

ARUP

Civil Engineer

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Mark Cooper

Mark is a Chartered Civil Engineer and an associate within Arup’s Transport and Ground Engineering team.

He has some 20 years’ experience, predominantly working across a wide range of transport and flood alleviation schemes.

Mark has worked as geotechnical advisor for a range of D&B contractor and transport authority clients across the UK and is a Panel Engineer under the Reservoirs Act for provision of asset management and maintenance advice for the continued safe functioning of dams. Mark is a past chairman of the ICE Wales Cymru Ground Engineering Group and past member of the ICE Wales Cymru committee.

Mark was the geotechnical lead for the A487 New Dyfi Bridge Project

Julian Davies

Julian Davies

Alun Griffiths

Chartered Engineer

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Julian Davies

Julian is a chartered engineer with over 40 years’ experience of civil engineering including highways and bridges, rail, water. As a project manager Julian has delivered projects throughout Wales and the Border Counties and as been involved with the A487 Dyfi Bridge Scheme throughout the ECI period developing the design and the statutory process. through to construction.