The World's Largest Tunneling Machine Is (Finally) Getting Rescued 

Bertha, the world’s largest tunneling machine, has been stuck under downtown Seattle since it broke in December 2013. Engineers have had to concoct a massive and expensive rescue plan—essentially a whole construction project in itself. And yesterday, the Bertha’s broken cutter head was finally hoisted out of the Earth. » 3/31/15 5:40pm 3/31/15 5:40pm

Big Bertha Is Digging Seattle's Massive Underground Freeway

The 2001 earthquake that brought down a length of State Route 99 running through downtown Seattle was a measly 6.8 on the Richter scale. But rather than rebuild the Alaska Viaduct, as the double-decker section was known, city officials instead decided to take the freeway underground in their very own Big Dig. To do… » 7/05/13 4:30pm 7/05/13 4:30pm