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Bertha Tunneling to Resume 1 Month Later Than Planned PDF Print E-mail
Written by Randy Post   
Thursday, 12 November 2015 22:47
The Bertha TBM after most of the repairs were completed

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 a unique repair operation involving an access shaft. The tunnel boring machine is currently undergoing testing, and a jet grouting operation to tighten up the ground in advance of the TBM was undertaken last month. [Source: More at WSDOT Alaskan Way Viaduct Page. Image: WSDOT Flickr]

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