Bertha’s route under Seattle had to be corrected last week after it was discovered that the boring machine was veering off its alignment. It was off by 6 inches. Related: Bertha enters final ...

Inside Bertha's control room inside the machine The tunneling route is divided into ten zones. The first of these is where Bertha will go slow, only about six feet (1.8) per day, as the engineers ...

It's a route that Seattle desperately needs ... Even without the unavoidable snags that can tie-up a massive machine like Bertha, the workers still need to get down into the TBM frequently ...

SEATTLE - Seattle's State Route 99 tunnel boring machine known as 'Bertha' is being dismantled in a disassembly pit, near the Seattle Center. The State Department of Transportation releaseD new ...

(Via WSDOT / Flickr) Bertha, the SR 99 tunneling machine ... the weight of mile-high glaciers,” WSDOT said. The route will take the machine past the foundation of the northbound SR 99 off ...

A repaired and rested tunnel machine Bertha launched its new year by boring forward 6½ feet on Monday, to the north edge of its repair vault along the Seattle waterfront. The giant Highway 99 ...

Seattle's tunnel boring machine that's been digging beneath the city for the State Route 99 tunnel reached ... Just before 10 a.m., Bertha pierced the cement wall of the tunnel, sending water ...

Tunnel-boring machine Bertha restarted Monday after being stopped ... the 838-ton disc would flake off along Bertha’s 1.7-mile route. Previously, one of the smaller machines that dug the ...

We're just months away from the opening of the new State Route 99 tunnel under Seattle. The project is years behind schedule, in part because of Bertha. You might know the tunnel boring machine ...

Bertha, Seattle's troubled tunnel machine, is on the move after being stalled for more than a year. The giant boring device that is trying to dig a new State Route 99 beneath the city started ...