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Drone video gives up-close look inside SR 99 tunnel
Q13fox   03 May 2016   USA   Seattle  
bertha_progress_ring17_0503
<p>SEATTLE — Bertha the tunnel-boring machine has now excavated 117 feet of the 385 feet needed before the SR 99 Alaskan Way Viaduct can reopen to traffic.<br>Seattle Tunnel Partners has installed 17 rings since mining started up again on Friday, WSDOT announced ...
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