Around 250 engineers have been working around the clock to reopen the Severn Tunnel
The Severn Tunnel has reopened (Image: Network Rail)
After weeks of travel disruption train services are once again running through the Severn Tunnel thanks to a £23m upgrade. Network Rail has completed work designed to improve the reliability of its cross-border services including upgrades to the overhead line equipment and the power supply inside the tunnel.
The busy route has reopened on Tuesday, June 9, after buses replaced trains between Bristol Parkway and Newport from Saturday, May 23. Around 250 engineers worked around the clock for 16 days to complete a world-first engineering solution inside the 4.35-mile tunnel beneath the Severn Estuary.
According to the rail company, the Severn Tunnel is “one of the most challenging environments on the UK rail network” due to a “unique combination of saltwater, moisture and a highly corrosive atmosphere.”
This has meant the overhead line equipment has seen an increase in wear since it was electrified, deteriorating quicker than other lines. For the biggest stories in Wales first sign up to our daily newsletter here.
To combat this Network Rail developed a new overhead line system designed for the tunnel’s harsh environment backed by a £23 million investment. This includes a simplified design using modified bridge arms and a continuous copper contact wire to create a more resilient and reliable railway while reducing the need for future maintenance.
Completed by Network Rails and its contractor ARQ (AmcoGiffen, REL and QTS), the project included:
- Replacing 838 overhead line support arms
- Installing 14,000 metres of new wiring
- Installing more than 7km single copper contact wire supported by modified bridge arms
- Removing and replacing 7,200 metres of ageing equipment throughout the tunnel
Vinny O’Holloran, operations director for ARQ, said: “It’s been great to see the level of effort and commitment of our 250 strong engineering and delivery team working tirelessly 24/7 for the past 16 days to deliver this vital overhead line renewal in the Severn Tunnel safely and efficiently.
“From working in the extreme heat, to overcoming the uniquely challenging conditions within the Severn Tunnel, our teams have shown outstanding resilience, skill and professionalism to successfully deliver this innovative, world‑first Overhead Line system.
“These essential works will help to create a stronger, more resilient rail infrastructure between Wales and England reducing future disruption to passengers and freight.”
