Between a rock and a hard place
Highway 99 runs north/south along the Western end of WA State. It goes through Seattle and Bellingham and the Seattle leg is served by a small viaduct. This viaduct is not earthquake-proof and is being replaced with a new tunnel.
The drilling machine is stuck.
From Seattle station
KING-5:
Drilling cranes ready to find out what's blocking Bertha
Two drilling cranes have been set up to determine what the obstruction is that has forced the giant boring machine called �Bertha� to stop in her tracks.
The cranes are set up at Old Alaska Way and Jackson Street, right above where Bertha is stopped.
Bertha, which is digging the new Highway 99 tunnel under Seattle, has been stopped since Friday, about 60-feet underground due to the unidentified obstruction.
That part of Seattle is built on landfill from the old
regrade project. It could be anything...
Posted by DaveH at December 10, 2013 2:50 PM