A 700-foot-long tunnel boring machine named Mary is being assembled in Washington, D.C., to dig a 5.5-mile stormwater and ...

Mary’s job is done. On Wednesday, the tunnel-boring machine known as Mary, responsible for digging the two new tunnels for the Hampton Roads Bridge-Tunnel expansion, completed the second and final leg ...

BOSTON — The Big Dig highway tunnels under downtown Boston are structurally sound and safe despite recent leaks, the Federal Highway Administration said Monday. The agency launched the investigation ...

National Briefing: New England: Massachusetts: Big Dig Leaks Found Water continues to leak steadily into a Boston Big Dig tunnel, an independent analysis shows, despite claims by officials of the ...

Elon Musk’s tunnel-digging startup has selected Nashville for its next underground transportation project, despite concerns from local politicians. The Boring Company said the new transit system, ...