Marathon, Florida

Knight Channel Bridge (Monroe County, Florida)
Built 1912; rehabilitated 1938
Girder bridge over Knight Channel on Pigeon Key Access
Closed to all traffic

Overseas Highway - Seven Mile Bridge (Monroe County, Florida)
Originally built by the railroad in 1912. Replaced and swing span removed 1982; Part of the bridge now used for fishing.
Concrete Arch and Deck Girder bridge over Moser Channel on Old US 1 with a through truss swing span (removed), now used as a Fishing Pier and observation deck in Marathon

Seawy Drive-Duck Key Canal Bridge (Monroe County, Florida)
Built 1955; rehabilitated 1982
Beam bridge over Duck Key Canal on Seaview Drive
Open to traffic