The $80 million tunneling machine known as ‘Bertha’ resumed mining Tuesday beneath the Seattle waterfront for the first time in about seven weeks. The machine moved forward about two feet, allowing ...

A colossal project to reduce traffic in the underground tunnels connecting the Virginia cities of Norfolk and Hampton just had a big breakthrough — literally. Since 1957, the two cities have been ...

The 271.5-tonne machine, named Caroline, has been launched for the Grain to Tilbury project by Michael Shanks. The project will construct a 2.2 km tunnel linking Essex and Kent, helping to modernise ...

Tunnel boring machines for the Suburban Rail Loop East are being assembled on launch sites, paving the way for construction ...

The Suburban Rail Loop has reached a major construction milestone, with eight tunnel boring machines now on site.

HS2 completed a five-mile tunnel drive under London on Thursday (April 3). The milestone was achieved using one of four giant tunnelling machines being deployed to build the railway’s Northolt Tunnel.

On Wednesday morning, crews removed the final piece of Bertha the boring machine out of the pit it has sat in since reaching the end of the tunnel running under Seattle. A live time lapse of the ...

Contractors working for the state of Washington are planning a high-stakes operation to rescue Bertha — the world's largest tunneling machine. Bertha is supposed to be boring a 2-mile highway tunnel ...

A giant boring machine that is digging the tunnels for the High Speed 2 (HS2) rail project has completed its journey - the first on the project to do so. Dorothy, a 2,000 tonne tunnel-boring machine ...

The five-story-tall tunneling machine that will bore a hole from SODO to Queen Anne for the new SR 99 tunnel now has a name: Bertha. The Washington State Department of Transportation launched a ...