What's In Bertha's Way?
Bertha, the drilling machine digging out the SR 99 tunnel, has run up against an unknown impediment.
Flickr Photo/WSDOT (CC-BY-NC-ND)
Marcie Sillman talks with Seattle Times transportation reporter Mike Lindblom about what may have halted Bertha, the huge tunneling machine in charge of digging the new SR 99 tunnel.
