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 ...

Tunnel boring machines have been in operation for over 200 years and they operate on the same basic principles today as they did back then.

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 CBBT said. https://www.wavy ...

Rosie, the tunnel boring machine named after Akron's own Rosie the Riveter, has a sister coming to town later this year, and her name is Elaine. Named after environmental advocate Elaine Marsh ...

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.

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 ...

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.

On a flat, windswept green plain north of Hamburg in the state of Schleswig-Holstein, Germany, a Herrenknecht tunnel boring machine is now 200 meters deep into burrowing under the Elbe River estuary.

The tunnel boring machine known as Chessie got back to work on April 8, days before the 60th anniversary of the bridge-tunnel’s opening on April 15, 1964. Skip to content. All Sections.