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Infographic on measures used by STP to remove the steel well casing blocking the Bertha TBM

Attempting to Remove the Pipe Blocking Bertha

January 14, 2014 rockman Comments Off

The Seattle Tunnel Partners JV is attempting to remove the rest of an 8 inch diameter steel well casing that has been blocking the Bertha tunnel boring machine since December 8, 2013. The upper 55 […]