Bertha ship docks at the Port of Seattle
Bertha, the SR 99 tunnel boring machine, arrives at Terminal 46 on board the Jumbo Fairpartner on April 6, 2013. The next destination for Bertha's 41 pieces is the 80-foot-deep pit to the west of Seattle’s stadiums, where she will begin tunneling in summer 2013. Learn more about Bertha at her webpage or follow her on Twitter @BerthaDigsSR99. Photo by Don Nelson, Port of Seattle.