viaduct

Alaskan Way Viaduct
8:11 am
Wed July 31, 2013

Problems And Progress For Seattle's Waterfront Tunnel

Architect Brian Runberg climbing onto the roof of the building he owns, with a building motion detector above him and the Alaskan Way Viaduct directly behind him.
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.

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Viaduct Replacement
12:09 pm
Fri July 19, 2013

Bertha To Get Send-Off Before Burrowing Below Seattle

Credit 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.

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Closing Roads To Build New Ones
1:20 pm
Fri May 17, 2013

The West Side Of The Mercer Mess Ramps Up

Aerial view of the Mercer Street project
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.

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State Route 99 Tunnel Megaproject
7:38 am
Wed April 3, 2013

The Tradition Of Naming Tunneling Machines

Bertha, on board the Fairpartner, in Elliot Bay
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.

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