An unknown mysterious object that is very big and very tough has been discovered in the mud underneath Seattle.
The tunneling machine involved is known as Bertha. Bertha is 5 stories tall and 300 feet long. There is much speculation about what the unidentified object might actually be. The most popular theory is that it may be a massive boulder left over from ice age glaciers, others think it may be a historical part of the city that was built over.
Bertha is a high tech tunneling machine that is operated by a crew of twenty people. It was being used to build a 3.1 billion dollar underground highway when it encountered the object.