Evergreen Point Floating Bridge

About

The Evergreen Point Floating Bridge, also known as the 520 Bridge and officially the Governor Albert D. Rosellini Bridge, is a floating bridge that carries Washington State Route 520 across Lake Washington from Seattle to its eastern suburbs. The 7,710-foot-long (2,350 m) floating span is the longest floating bridge in the world, as well as the world's widest, measuring 116 feet (35 m) at its midpoint. It is a toll bridge and uses electronic collection.

The bridge opened in April 2016 and replaced the original Evergreen Point Floating Bridge at the site, which was 130 feet (40 m) shorter and four lanes wide. The original bridge was vulnerable to earthquakes and strong wind events, which would frequently shut down traffic. Planning for a replacement began in 1997 and was approved in 2011; the $4.65 billion budget was derived from state gas taxes and federal sources, as well as toll revenue. Construction of the 77 concrete pontoons began in 2011 and on-site assembly began in 2014.