Big Bertha about to head under downtown Seattle for 14 monthson July 19, 2013 @ 11:46 am (Updated: 11:09 pm - 7/19/13 )
See all photos
The Washington State Department of Transportation is holding a dedication ceremony Saturday so you can get one last look before Bertha goes to work.
"People can walk around. They'll actually be able to walk over the top of Bertha's launch pit and peer down at her, which is really great to see how big she is and understand the scale of the project," says KaDeena Yerkan with WSDOT.
Yerkan says Bertha has a lot of work to do digging up 850,000 cubic yards of dirt.
"If you put it in (CenturyLink) Field, it would be about 100 feet taller than the roof line," says Yerkan.
The soil from the tunnel will come out on a conveyor system to Terminal 46 where it will be barged across Puget Sound to Mats Mats in Jefferson County.
"There is an old quarry there, it's a reclamation site, and so they'll use the dirt to fill in the old quarry," says Yerkan.
Watch Big Bertha's cutterhead spin:
The mother of an alleged high school rape victim speaks out
Recent crimes have Dori worried about the state of one of his favorite Seattle parks
Plagued by Problems
Ferry woes have added up this year with canceled routes, overcrowding & staff issues
Please login below with your Facebook, Twitter, Google+ or Disqus account. Existing MyNorthwest account holders will need to create a new Disqus account or use one of the social logins provided below. Thank you.