Available Resources
Video: Changing cutting tools on Bertha TBM
This is an interesting video of crews changing cutterhead teeth on the Bertha TBM beneath downtown Seattle. [Source: WSDOT YouTube Channel. Image: YouTube]
cutterhead
Project Related
Tunneling machine’s front end bolted in place
The troubled Alaska Way Viaduct Replacement Tunnel TBM known as Bertha has reached a milestone in its repair. The front cutterhead has been repaired, and has been lowered back into the access shaft to be […]