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In Seattle, A Giant Tunnel-Boring Machine Named Bertha Finishes Its Dig04:09
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Bertha's massive cutter head breaks through the final barrier. (Kate Walters/KUOW)
Bertha's massive cutter head breaks through the final barrier. (Kate Walters/KUOW)
This article is more than 3 years old.

This week President Trump said his administration is working on an infrastructure initiative which could cost $1 trillion. One city that’s now in the middle of a huge infrastructure project is Seattle, which has reached a milestone in its plans to move a two-mile section of a state highway underground.

After nearly four years, the giant tunnel boring machine known as Bertha has finished its dig underneath the city. Kate Walters of Here & Now contributor KUOW was there when Bertha finally broke through.

This segment aired on April 6, 2017.

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