John Hennessy III,
P.E.
An overview of the reasons why the new SR 520 floating bridge was built on Lake Washington, and some of the solutions the project team developed to efficiently build the world’s longest floating bridge. The project won a 2016 Excellence in Design (Engineering) Award from the Design-Build Institute of America.
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On Nov. 26, 2013, SR 520 bridge construction crews launched a 660-ton coffer cell onto Lake Washington. This coffer cell will be used to create a dry work space so that crews can complete repairs to the end walls of Pontoon U and Pontoon V on Lake Washington.
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This is the seventeenth in a series of entries celebrating infrastructure achievements in the United States.
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