"The Evergreen Point Floating Bridge (top picture), is the longest floating bridge on Earth at 7,500 feet (2,300 m). The bridge was built as a four-lane toll bridge to provide easy access from Seattle to Eastside communities. Today the bridge is near the end of its useful life, according to the state Department of Transportation. In 1997, Myint Lwin, WSDOT's chief bridge engineer at that time, said that even with repairs, the bridge could be expected to last only about twenty more years (until 2017). The bridge must be closed in high winds, and it is at risk of collapse in an earthquake. Due to the weight of various reinforcements over the years, the bridge currently rides about a foot lower in the water than it did originally. The DOT is working on replacing the aging bridge with a new span of six lanes."Wiki
"Lacey V. Murrow Memorial Bridge (bottom picture) is a floating bridge that carries the eastbound lanes of Interstate 90 across Lake Washington from Seattle to Mercer Island, Washington. It is the second longest floating bridge on Earth at 6,620 ft (2,020 m)."Wiki The top picture is a Wikipedia picture in the public domain.