Bertha
Video
SR 99 Tunnel – From Space Needle to the Stadiums
Now that the tunneling machine Bertha’s work is complete, it’s possible to fly a drone with a video camera from end-to-end inside Seattle’s...
Video
Disassembling Bertha: A peek inside the SR 99 tunneling machine (May-June 2017)
The inner-workings of the SR 99 (Seattle, Puget Sound) tunneling machine Bertha are now fully visible from the camera above the pit where...
AECNews Releases
A Drone’s View of Bertha’s Breakthrough in Seattle
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...
