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Great American Infrastructure: Seattle, WA: Governor Albert D. Rosellini Bridge-Evergreen Point Bridge

Posted by Content Coordinator on Monday, April 30th, 2012

This is the seventeenth in a series of entries celebrating infrastructure achievements in the United States.


What: The Governor Albert D. Rosellini Bridge-Evergreen Point Bridge (a bridge of many names, formerly The Evergreen Point Floating Bridge, and also referred to as the SR 520 Bridge or 520 Bridge), is the longest floating bridge in the world.

When: The bridge opened on August 28, 1963 and is currently in the process of being replaced by a new floating bridge.

Where: The Governor Albert D. Rosellini Bridge-Evergreen Point Bridge crosses Lake Washington from Seattle, WA to Medina, WA.

– Length: approximately 7,498 ft (1.42 miles)
– Width: 60 ft.

Great American Infrastructure: Governor Albert D. Rosellini Bridge-Evergreen Point Bridge

Interesting facts: The bridge was renamed in 1988 to honor of Governor Albert D. Rosellini (1910-2011), who advocated for its construction.

The bridge is supported by 33 bridge pontoons, each weighing about 77 tons.

Due to structural vulnerabilities, the bridge is currently in the process of being replaced.  The existing bridge was designed to withstand 50-70 mph winds, while the new bridge will hold up to 92 mph winds. Construction of the new floating bridge is expected to be complete in 2014.  Check out the video below to see some of the plans in place for the new bridge.

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