Seven Mile Bridge

Florida Keys

Owner: Florida Department of Transportation

Design / Construction Engineering and Inspection Support: FIGG

At the time of its completion in 1982, Seven Mile Bridge (35,867’ long) in the Florida Keys was the longest continuous concrete segmental bridge in the world. The bridge’s 264 spans carry the Overseas Highway from Marathon to the Lower Keys. The bridge utilizes a precast, post-tensioned box girder superstructure and hollow precast segmental piers, which increased the speed of erection. The structure was completed six months ahead of schedule. FIGG’s segmental alternate saved $7 million when bid against an alternate design.



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