SR 520 Pontoon repairs
Pontoon repairs will be made at a drydock in Portland or Seattle, or on Lake Washington using a coffer cell -- a steel box attached to the underside of pontoons. The repairs, endorsed by an expert review panel, are necessary to ensure that the new floating bridge meets its 75-year design life.

Washington State Department of Transportation contractor Kiewit/General/Manson, A Joint Venture, will complete repairs.

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