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  • What's blocking 'Bertha' still a mysteryadd to reading list  

    Posted on December 11, 2013 at 5:06 PM

    Updated Wednesday, Dec 11 at 8:50 PM

    There are still no answers yet on what's blocking "Bertha," the giant tunnel boring machine drilling the new Highway 99 tunnel underneath Seattle.

    By KING 5 News

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