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HS2’s Colne Valley Viaduct now fully waterproof after two-year engineering effort

Summary by ianvisits.co.uk
HS2’s Colne Valley Viaduct in west London is now waterproof after VolkerLaser completed two years of work on the structure. The viaduct in Sept 2024 prior to removal of construction barges (c) ianVisits Spanning 3.4km across West London’s Colne Valley Regional Park, the viaduct will carry HS2 trains over the valley for a few minutes between the Ruislip and Chiltern tunnels. Yes, they looked at building a tunnel, and no, it wasn’t a better idea. …
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ianvisits.co.uk broke the news in on Wednesday, July 23, 2025.
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