First concrete placement done on Seattle's $367M pontoon bridge

07/10/2011

The Washington State Department of Transportation marked a milestone in the $367 million State Road 520 floating bridge pontoon construction project when crews completed the first concrete placement last week. Construction of an 18-inch-thick slab segment used about 660 cubic yards of concrete. About 10,300 cubic yards of concrete will be used when the basin floor is complete. Washington State Department of Transportation (7/8)

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