Bertha the SR 99 tunneling machine moved past the 5,280-foot mark on Thursday morning, creeping ever closer to an end point it’s expected to reach next spring. Like a “moving factory ...

On April 4, the world's largest tunnel boring machine broke through to the open air after almost four years underground. Called Bertha ... and a cylindrical factory 322 ft (98.2 m) long.

The reassembled front end of Bertha, the SR 99 tunneling machine, is lowered into an access pit in August 2015. (Flickr Photo / WSDOT) If you’ve forgotten what Bertha, the SR 99 tunneling ...

It wasn’t too long ago that MyNorthwest reported Bertha was in Zone 2. Back then, in May 2016, there was a long way to go for the world’s largest boring machine on its 10-zone journey.

Even at rest, it’s a cacophony of noises, though it isn't like being on a factory ... of the machine in a bubble of compressed air. The cutterhead covers the entire front of Bertha and rotates ...

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 ...

Bertha has made it to the finish line. The celebrity boring machine’s arrival near Seattle Center, some 29 months late, guarantees a Highway 99 tunnel bypassing downtown. And the Alaskan Way ...

After more than a year stuck under ground, the tunnel boring machine called Bertha has started moving again. After more than a year of stuck underground, the mammoth machine charged with boring ...

Bertha, the world’s largest tunneling machine, has been stuck under downtown Seattle since it broke in December 2013. Engineers have had to concoct a massive and expensive rescue plan ...

Crews used a massive crane Monday to begin lowering the roughly 4-million-pound cutter head and drive unit for Bertha back into the ground, where it will be reinstalled on the machine and tested ...