A welder prepares for the tunnel-boring machine “Angeli” to break through a wall of dirt at the 2nd Place/Hope Street Station in downtown Los Angeles. (Irfan Khan / Los Angeles Times) ...

China has completed the production of its largest tunnel-boring machine (TBM), measuring 16.64 meters (54.5 feet) in diameter. The machine is named Jianghai, which means “river and ocean” in ...

Work has started on the tunnel that will carry the southern extension of the MRT Purple Line in Bangkok under the Chao Phraya ...

Mary, the tunnel-boring machine, is on the move again! Thursday, Mary began boring a twin eastbound tunnel in part with the HRBT Expansion Project.

SEATTLE — The world’s largest tunnel-boring machine broke through a concrete wall beneath Seattle on Tuesday to reach the end of its long, troubled journey, a milestone in a multibillion-doll… ...

Now, The Boring Co. machine will dig – cheese grater-style – a 500-foot-long, horizontal pedestrian tunnel that is 20-by-150 feet and 13.5 feet in diameter, according to interim Hawthorne City ...

On Saturday,the world's largest tunnel boring machine was dedicated in the city of Seattle. “Bertha,” as it’s known, will spend the next 14 months boring a 1.7 mile (2.7 km) tunnel under the ...

HAMPTON ROADS, Va. — The Chesapeake Bay Bridge-Tunnel (CBBT) has some good news about Chessie—the tunnel boring machine being used for its Parallel Thimble Shoal Tunnel Project. Chessie is ...

VTA asks residents to name its $76 million tunnel boring machine The tunnel boring machine was purchased last year and cost $76 million By Grace Hase | ghase@bayareanewsgroup.com | Bay Area News Group ...

The requirements emerged: Bertha's cutterhead—her face—would be 57½ feet across, as tall as the viaduct she was replacing. She would have hundreds of teeth to chew with. She'd digest the muck ...

The tunnel boring machine’s cutting head — which looks a bit like a cheese grater attachment on a food processor — will turn at 20 revolutions per minute to tear up the earth, propelled by a ...