A project nearing completion in the Detroit area used a custom-built, diver-operated vehicle that can operate underwater and that replaced concrete liners for two raw water tunnels, eliminating the ...

This video explores the construction of the Fehmarnbelt Tunnel, an 18 km long underwater tunnel in the Baltic Sea that has ...

What's the longest underwater tunnel you've ever driven through? The Holland Tunnel into Manhattan, or maybe the Battery Tunnel into Brooklyn? Well, Norway laughs at your pitiful American underwater ...

A feasibility study by German tunnel experts Herrenknecht has found that drilling the tunnel is "technically viable".