Contents Pages by Subject


Subject Photo
Article Image News Link • GlobalTop Tech, AARIAN MARSHALL

LIFE HAS NOT been entirely kind to Bertha, the largest tunnel boring machine in all of North America. About two years ago, the machine, which measures 57 feet tall and 325 feet long, started excavating a two-mile tunnel under downtown Seattle.

Join us on our Social Networks:


Share this page with your friends on your favorite social network: