Then the tunnel-boring machine named after the former first lady freshened up a bit and wormed back underground, ready to dig a massive hole beneath the Anacostia River toward the doorstep of ...

Here’s a hypnotic GIF in case you missed it ... After a dig that’s spanned years, a part of the massive tunnel-boring machine has cut past a concrete wall. Seattle Times reporter Mike ...

The tunnel boring machine known as Chessie broke through the receiving pit on Two Island at the Thimble Shoal Channel at the Chesapeake Bay Bridge-Tunnel Monday, the ...

Here's how the tunnel boring machine, or TBM, works: As the 200-ton TBM moves forward, a round cutter head studded with titanium teeth grinds into the tunnel face and splits large chunks off the rock.

Mary, the tunnel boring machine that has been paving the way for the expanded Hampton Roads Bridge-Tunnel, hit a milestone Wednesday when she finished the first of twin tunnels that are part of the ...

expansion achieved a major milestone as its tunnel boring machine reached its destination. Nicknamed "Chessie," the tunnel ...

Mary, the tunnel-boring machine, is on the move again! Thursday, Mary began boring a twin eastbound tunnel in part with the Hampton Roads Bridge-Tunnel Expansion Project. Watch: First of 4 ...

In short: A tunnel boring machine in the Snowy 2.0 hydropower project has become wedged in hard rock and unable to move forward. It's the latest in a series of problems plaguing the $12 billion ...

Burrowing of a new tunnel to help carry more vehicles between Virginia Beach and the Eastern Shore has resumed about 10 months after a gigantic boring machine struck an old ship anchor buried ...