The almost finished product
After months of anticipation, the SR 99 tunnel boring machine nears completion. With the cutterhead installed, crews prepare for final rounds of testing before the machine is disassembled and shipped to Seattle. In late December 2012, representatives from WSDOT and Seattle Tunnel Partners will be on hand in Japan to officially accept the machine from its manufacturers, Hitachi Zosen. Learn more about Bertha, the SR 99 tunneling machine, at her webpage or follow her on Twitter @BerthaDigsSR99.