By Dan SpringerPublished May 08, 2014FoxNews.comFacebook476 Twitter508 Gplus0 At 57 feet in diameter, it's touted as the world's biggest tunneling machine. It was even given a name, Bertha. But now, after digging just over 1,000 feet, Bertha is broken down and stuck underneath Seattle's downtown waterfront. And fixing the massive mess could cost taxpayers millions. The tunneling machine is the key workhorse in a $3.1 billion tunnel project aimed at replacing the Alaska Way Viaduct, a double-decker elevated highway that was damaged in the 2001 Nisqually earthquake. Bertha's meltdown, though, has put the project in jeopardy of being the West...
