Big Bridge Crumbling Machine

Photo Courtesty of Washington Dept. of Transportation

Here is a big machine that has tractor treads to move around a job site. It also has a big claw that crumbles concrete. This machine is good at tearing stuff apart. Go to this link to see a lot of pictures about it. There are videos too: http://www.flickr.com/photos/wsdot/sets/72157613079963114/