popmech: Why Seattle’s Huge Tunnel-Boring Machine Is Still Stuck December has been kind to Seattle’s enormous tunneling project. And not just this December. A year ago this month, North America’s largest tunnel-boring machine got stuck just 10
popmech: Why Seattle’s Huge Tunnel-Boring Machine Is Still Stuck December has been kind to Seattle’s enormous tunneling project. And not just this December. A year ago this month, North America’s largest tunnel-boring machine got stuck just 10