Commuters traveling west on Seattle’s state Route 520 had the first-ever opportunity to traverse the world’s longest floating bridge; then, heading back east, they crossed the world’s second- longest floating bridge. Washington State Dept. of Transportation crews opened the new, 7,710-ft-long bridge to westbound traffic for the first time on Monday, April 11. In about two weeks, the joint venture of Kiewit-General-Manson will move all traffic, providing commuters three lanes in each direction. To avoid Lake Washington’s waves, the roadway is elevated 20 ft above 77 concrete pontoons. An additional 14-ft-wide bike-and-pedestrian path will be on the north side.
Seattle Opens World's Longest Floating Bridge
April 13, 2016