Drilling on the final HRBT tunnel is set to finish up later this month, with a breakthrough date scheduled for September 24.

If you’re going to be the biggest tunnel digging machine in the world, you deserve a beefy name to back it up. That’s the thinking of the Washington State Department of Transportation, which announced ...

Crews are now drilling a launch pit to hold the massive tunnel-boring machine for the Alaskan Way Viaduct Replacement project. The project will be using the largest diameter tunnel boring machine ever ...

NEW DELHINEW DELHI — Attempts to reach 41 construction workers stuck in a collapsed tunnel in northern India for two weeks were again stymied Saturday. The drilling machine broke down late Friday ...