The back end of Bertha. A lot happens here: Concrete tunnel liners are laid, excavated dirt runs through tubes and a conveyor belt system. So clean and shiny now. Can't wait to see what it looks like on the other side.
A Closer Look at Bertha
At the media preview on Saturday, July 20, Seattle magazine editor in chief Rachel Hart toured Bertha's dig site with photographer Stuart Isett. The 57.5-foot diameter cutterhead can swallow boulders 3 feet in diameter.