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.

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 ...

HAMPTON ROADS, Va. — The massive boring machine that's being used in the Hampton Roads Bridge-Tunnel expansion project reached a huge milestone. The machine, named "Mary," is digging the tunnel ...

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 ...

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