Updated 11:56 am, Wednesday, May 10, 2017
Now that the task of digging the nearly two-mile tunnel beneath Seattle is complete, Bertha’s usefulness is over.
But as the largest tunnel boring machine in the world, Bertha can’t just be put on a truck and wheeled off to the next job. Instead, the hulk is getting cut to pieces and hauled away one multi-ton piece at a time.
Crews with contractor Seattle Tunnel Partners cut out the first piece of the 900-ton cutter head on May 5, hauling the first massive chunk out of the pit and up to the surface.