The Washington Transportation Department is making repairs and modifications to ensure that the World's Longest floating bridge is able to withstand a 75-year design life. The new Highway 520 floating bridge design will address findings made by an expert panel who reviewed cracks in the first pontoons built. These cracks grew over winter, although a structural engineer indicated that the bridges is still adequate to withstand all anticipated loads. The WSDOT is reviewing all protocols and standards procedures of the project management process and the administration of the contract on the construction site. Some of these cracks, that could let water in at a rate of 1 cubic foot per hour, begin in the end walls and continue all the way along the top and bottom of the pontoons. A total of 77 pontoons will make the world's longest floating bridge.
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