WSDOT video provides view from a drone inside the SR 99 tunnel

Just a few days before the State Route 99 tunneling machine started tunneling under the Alaskan Way Viaduct in Seattle in May 2016, the Washington State Department of Transportation flew a video-equipped drone through the site to show Seattle Tunn
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Just a few days before the State Route 99 tunneling machine started tunneling under the Alaskan Way Viaduct in Seattle in May 2016, the Washington State Department of Transportation flew a video-equipped drone through the site to show Seattle Tunn