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Boring Bertha Has Been Freed And Will Try Again

caption: The hole built to rescue Bertha, the deep boring machine.
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The hole built to rescue Bertha, the deep boring machine.
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Engineers have removed the cutter head from the enormous tunneling machine nicknamed Bertha. The malfunctioning part had been stuck for more than a year in a highway project under Seattle's downtown.

Ongoing coverage of Bertha, Seattle's tunneling machine.

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