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Bertha's new bearing is delivered
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Bertha TBM Gets Spare Parts

June 14, 2015 rockman Project Related Comments Off on Bertha TBM Gets Spare Parts

The Bertha TBM just received a shipment of spare parts to repair the giant tunneling machine. The manufacturer decided to redesign the seal system to make it easier to access from the inside, if necessary. […]

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Plan for Bertha Repair Submitted, Archaeological Surveys Underway

March 20, 2014 rockman Project Related Comments Off on Plan for Bertha Repair Submitted, Archaeological Surveys Underway

Seattle Tunnel Partners and WSDOT are moving forward with the plans to excavate a 120 foot deep shaft to repair the Bertha Tunnel Boring Machine. Unfortunately, there are archaeological issues since the project team did […]

A welder attaches protective shields to one of the two 21-foot-diameter tunnel-boring machines at the north end of the project near Husky Stadium. The entrance to the northbound tunnel is at upper right.
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Tunnel boring to begin on light-rail link in Seattle

May 20, 2011 rockman Project Related Comments Off on Tunnel boring to begin on light-rail link in Seattle

This week, Seattle’s Sound Transit will start drilling a $2 billion, three-mile light-rail tunnel to connect the University of Washington, Capitol Hill and Westlake Center. The first TBM will be christened today near UW’s Husky […]