This is an interesting video of crews changing cutterhead teeth on the Bertha TBM beneath downtown Seattle. [Source: WSDOT YouTube Channel. Image: YouTube]
Video: Changing cutting tools on Bertha TBM
Miscellaneous
Happy National Tunneling Day (UK)
The British Tunnelling Society (BTS) is encouraging our profession and the public to celebrate National Tunneling Day today, December 7. Their goal is to promote the industry (and its many professions) to students of all ages […]
Project Related
Bertha Tunneling to Resume 1 Month Later Than Planned
The Seattle Tunnel Partners JV announced last month that tunneling on the Alaska Way Viaduct Replacement project will resume a month later than originally planned. The Bertha TBM will resume mining on December 23 after […]
Project Related
Eliza TBM Digs for Michigan’s $162M I-75 Project
A TBM named for Eliza Leggett, an active participant on the underground railroad, and later a suffragist, has been tunneling for the past 6 months on the massive I-75 reconstruction project in metropolitan Detroit. The […]