Vehicles, People In Water After Washington Interstate Bridge Collapse CBC NEWS: The Washington State Patrol says the Interstate 5 bridge over the Skagit River at Mount Vernon has collapsed, dumping vehicles and people into the water. Trooper Mark Francis said the four-lane bridge collapsed about 7 p.m. PT, closing all northbound and southbound lanes between Burlington and Mount Vernon. Francis says he has no idea how many people are in the water or whether there are any injuries or deaths and he did not know what caused the collapse. A Skagit Valley Herald reporter at the scene said a sheriff's office rescue boat has arrived and rescue crews were looking for people in the water. The reporter saw one person sitting atop one vehicle in the water and could see a second vehicle as well. Crowds of people lined the river to watch the scene unfold, the newspaper reported.