Video: Changing cutting tools on Bertha TBM

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 […]

On October 15, a major milestone was reached on Europe and the World’s longest rail tunnel. The Gotthard Base tunnel under the Swiss Alps will form a high speed rail link between northern and southern […]

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 […]