Crews discovered an 8-inch steel pipe protruding through one of the openings of Bertha the tunnel boring machine today. The Seattle Tunnel Partners aren't ready to say exactly what is blocking Bertha, ...

Tunnel-boring machine Bertha restarted Monday after being stopped for about four weeks so some of its steel cutting teeth could be replaced. The giant drill is currently 120 feet below Spring Street ...

Bertha, the world’s largest tunneling machine currently stuck below Seattle’s waterfront, has her winter coat. The tunneling contractor, Seattle Tunnel Partners, has lowered three large pieces of the ...

SEATTLE – With a cloud of dust, Bertha — Seattle’s tunnel boring machine — reached the end of her long, troubled journey, a milestone in a multibillion-dollar project to replace an aging highway ...

The Washington State Department of Transportation is hailing this week as a milestone in the unfortunate saga of Bertha, the $80 million tunnel boring machine that's been stalled for two years beneath ...

A 360-degree video shot inside the tunnel being built beneath Seattle gives viewers a unique new perspective of what it’s like to bore a 2-mile tube and construct a highway 200 feet underground. As ...

The disassembly pit where the SR 99 tunneling machine Bertha is set to emerge in Seattle on Tuesday. (GeekWire Photo / Kurt Schlosser) After mining through more than 9,000 feet of Seattle underground, ...