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A Drone’s View of Bertha’s Breakthrough in Seattle

April 5, 20171 Mins read535
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The SR 99 tunneling machine, Bertha, breaks through to daylight on April 4, 2017 near Seattle’s iconic Space Needle after tunneling 1.7 miles underneath downtown Seattle. See what one of the world’s largest tunneling machines looks like up close as only a drone can show.

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