FILE - In this Friday, May 24, 2013 file photo, southbound Interstate 5 traffic is routed off the highway and onto a local road north of the collapsed portion of the Interstate 5 bridge

 

              FILE - In this Friday, May 24, 2013 file photo, southbound Interstate 5 traffic is routed off the highway and onto a local road north of the collapsed portion of the Interstate 5 bridge
FILE - In this Friday, May 24, 2013 file photo, southbound Interstate 5 traffic is routed off the highway and onto a local road north of the collapsed portion of the Interstate 5 bridge, at the Skagit River, in Mount Vernon, Wash. A truck carrying an oversize load struck the four-lane bridge on the major thoroughfare between Seattle and Canada, sending a section of the span and two vehicles into the Skagit River below Thursday evening. For farmers, business owners and government officials up and down the West Coast, the bridge collapse on Interstate 5 represents much more than a close brush with tragedy. As much as $20 billion in freight travels to and from Canada and along the busy north-south corridor each year. Experts say the economic impact from the bridge collapse will spread further than western Washington. (AP Photo/Elaine Thompson, File)