For use with portable boring bar systems including the Bore Repair EV, TM, AM and BB series, the patent-pending Bore Repair Groover snap-ring groove cutting tool will fit inside and machine bores as ...

Bertha, the world’s largest tunnel boring machine, today broke through a 20-foot wall of a repair pit, WSDOT reported. It will continue drilling two more feet before stopping to build another concrete ...

Bertha has inched forward, and is on the verge of breaking out of its repair pit and once again chewing its way beneath Seattle. Bertha, the Seattle tunnel boring machine, is poised to grind through a ...

Bertha, the giant boring machine in Seattle that's been stuck in a subterranean hellscape since December 2013, is finally going to see the light of day once again. Her drilling head is free and ready ...

The massive tunnel boring machine called Bertha sits at the bottom of a rescue pit Wednesday in Seattle. The machine is now in position to be torn apart so it can be repaired. State transportation ...

The Hudson Tunnel Project is marking another major milestone as it nears a critical point in the $16 billion process. During its Aug. 20 board meeting, Gateway Development Commission announced that ...