viaduct

Seattle City Councilmember Mike O'Brien, longtime opponent of the waterfront tunnel, has been pushing Washington State Department of Transportation officials to be more transparent.
KUOW Photo/Joshua McNichols

Pioneer Square sank more than an inch, and Bertha the giant tunnel boring machine is still stuck, but state officials are putting on a happy face.

Washington State Department of Transportation officials returned to the Seattle City Council Monday to discuss worst-case scenarios for the waterfront tunnel project. Bertha, stuck under downtown Seattle for nearly a year, was mid-rescue when officials realized that buildings were settling deeper into the ground.

Yikes.

Bryan Runbert
KUOW Photo/John Ryan

The world’s largest tunneling machine started grinding into the soil beneath downtown Seattle Tuesday afternoon. The machine known as Bertha is digging a 58-foot-wide tunnel to replace the Alaskan Way Viaduct.

Flickr Photo/WSDOT

Very soon, a massive piece of machinery will start to burrow two miles out from Seattle. It’s building the tunnel that will replace the Alaskan way viaduct.

Tomorrow, WSDOT is hosting a big sendoff for the biggest tunneling machine in the world, affectionately named Bertha. The public is invited to check it out Saturday between 11:30 a.m. and 3:00 p.m., provided closed-toed shoes are worn.

Flickr Photo/SDOT Photo

Driving around Seattle this weekend will be trickier than normal. The Seattle Department Of Transportation plans to close parts of Aurora and Mercer Street around South Lake Union as part of the effort to convert Mercer into a two-way street. The city's now focusing on the Mercer West project, the section of Mercer between Dexter Avenue and West Fifth Avenue.

Bow Jones

Bertha is here. The world’s largest tunnel boring machine arrived in Seattle Tuesday after being shipped from Japan. It’s expected to reach land sometime this week. After that, in a few months, it will get to work drilling the tunnel that will replace the Alaskan Way Viaduct.