This photo, from February 2015, shows a specially designed truck carrying tunnel ring segments into the tunnel. Crews could not begin building the tunnel's lower deck during mining because it would have blocked this delivery access.

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Size: 2108px × 1186px
Photo credit: © PR images / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 99, ^gp, alaskan, bertha, boring, highway, machine, replacement, seattle, sr, tunnel, tunneling, viaduct, wsdot