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What It Takes to Keep a 7,700-Foot Floating Bridge From Doom

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Learn about the science behind floating bridges from WIRED.

Washington’s love of floating bridges can be traced to the topography around Seattle. Lake Washington, east of the city, plunges to a depth of more than 200 feet, and the bottom is, from an engineering perspective, crap. It’s soft silt, which makes building a conventional suspension bridge with rooted towers quite difficult (read: expensive). Each tower would have to be about 630 feet tall, the state DOT says—twice the height of the sentinels holding up the Brooklyn Bridge.

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1 Comment

  1. Last week I drove across the new Eastbound lanes. Pretty nice bridge – when it’s not just a floating parking lot.

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