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Main Onshore Pipeline: Microtunnelling works beneath the North Wales Coastal Railway Line

A microtunnelling update from our construction contractor
Our Engineering, Procurement and Construction contractor, United Infrastructure, and its specialist tunnelling subcontractor Joseph Gallagher Limited, have begun microtunnelling operations beneath the North Wales Coastal Railway Line this week.

These works are due to take place across approximately 5 days and are due to finish on Friday 2 October 2026 (subject to progress).

Microtunnelling works require 24-hour operations to ensure the safety of the tunnel and construction team.


About microtunnelling


Microtunnelling is a trenchless tunnelling technique that will bury the Pipeline deep beneath the ground, ensuring minimal disruption to key infrastructure, transport routes and environmentally sensitive areas. This means the North Wales Coastal Railway Line will remain fully operational during the works.

More information about 24-hour microtunnelling works is provided in the microtunnelling factsheet here


Graphic detailing the microtunnelling process