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Boring the Seattle Tunnel

The City of Seattle says farewell to Bertha as she starts her journey burrowing for over a year under Seattle's streets.

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A surveyor sets up his gear near the south end of the SR 99 tunnel on Friday, Dec. 6. Bertha, the SR 99 tunneling machine completed her first 1000 feet of tunneling a day earlier.
Photo by (WSDOT Flickr)
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