Bertha has reached 2,000 feet and is headed under downtown Seattle

May 18, 2016, 12:45 PM | Updated: 2:40 pm

Bertha, WSDOT, tunnel, Seattle...

Bertha has traveled 2,000 feet and will soon enter Zone 3 of its journey under Seattle. (WSDOT)


After taking a break last weekend, Bertha – the tunneling machine moving below the Seattle waterfront – has passed the 2,000-foot mark. Crews have installed 300 tunnel rings in her wake.

Related: Bertha delays are nothing compared to these historic Seattle projects

The milestone means Bertha and Seattle Tunnel Partners have completed 20 percent of the job.

Now the world’s largest boring machine is finishing up Zone 2 (out of 10 zones.) Zone 3 is located under the Columbia Street on-ramp that leads to the Alaskan Way Viaduct. After that, Bertha will bore under Western Avenue.

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Bertha has reached 2,000 feet and is headed under downtown Seattle