The new bridge is a box-girder structure built from precast,
prestressed concrete sections, comprising 440 spans. Near the center, the bridge rises in an arc to provide clearance for boat passage. The remainder of the bridge is considerably closer to the water surface. The new bridge does not cross
Pigeon Key. The total length of the new bridge is actually or , and is shorter than the original. The bridge carries the Florida Keys aqueduct, supplying water to points west, as well as fiber optic cables, providing telecommunications to and from the lower Keys. Each April, the bridge is closed for about 2.5 hours on a Saturday for the
Seven Mile Bridge Run that commemorates the
Florida Keys bridge rebuilding project. The event began in 1982 to commemorate the completion of a federally funded bridge building program that replaced spans that oil tycoon
Henry Flagler constructed in the early 1900s to serve as a foundation for his
Overseas Railroad. The Seven Mile Bridge was engineered by
Figg & Muller Engineers (who also engineered the much taller
Sunshine Skyway Bridge). The structure was completed six months ahead of schedule and has earned eight awards, including an Exceptional Award for Cost Savings Innovation from the Federal Highway Administration. ==In fiction==