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The Brynglas Tunnels and adjacent structures, first opened in 1967 after a 3 year construction period and have been in operation continuously ever since. At their peak they carry approximately 80,000 vehicles per day and must be considered a major transport link for the resilience of Wales and the wider UK.
Following continuous use and the progressive increase in traffic volumes, the structures and tunnel's condition were evaluated as poor with many assets reaching their operational life. Furthermore, the tunnel experienced a serious lorry fire in the westbound tunnel in July 2011, where 215m of the original internal and exit zone lighting was destroyed, as a result, temporary lighting and a 50mph speed restriction was imposed to maintain traffic flows and transport resilience.
The contract for the refurbishment of both the tunnel and adjacent structures was awarded to Costain in 2016, due to the complexity of River Usk Bridge the design remained with Welsh Government and specifically WSP.
The following presentation describes the history, the refurbishment contract and the complexity of the design and build phase.
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Phil Davies is a Chartered Engineer and registered Project Professional. He joined Costain in 1990 on the M4 Lon Las project and has been involved in many of the major highway schemes undertaken by Costain over the last 28 years. Phil was involved in the tender and concept for the Brynglas Tunnel Refurbishment and has overseen the delivery and completion of the works.
Head of Structures, Welsh Government
Jason joined Welsh Government in 2006 after previously working as a Bridge Engineer at Atkins in Cardiff. At Atkins, Jason gained experience in the design, inspection, structural assessment and strengthening of highway and rail structures. Jason was promoted to Head of Structures in 2011 and represents Welsh Government on the UK Bridges Board and Bridge Owners Forum. His role covers the Technical Approval and management of almost 4000 structures on the Welsh Motorway and Trunk Road network.
Senior Project Manager, Arcadis LLP
Simon has over 30 years' experience in the civil engineering industry having gained valuable experience as a designer and project manager in land reclamation, contaminated land remediation, major earthworks, demolition, structural engineering, schools new build development and highways sectors.
In the past 15 years Simon's role has predominantly been centred on Contract and Programme management / formulation, leading many major schemes to a successful conclusion in the Wales region. Simon was a member of the Employer's Agent tender preparation team, playing a key role in compiling the contract agreement documentation for the Brynglas Tunnels Refurbishment project and thereafter providing assistance to the Welsh Government in the tender evaluation and contractor interview process. Post contract award his role turned to that of Project Manager under the terms of the contract, acting as Agent for the Employer, Welsh Government.