Seven Mile Bridge, Linking Florida Keys, Marathon, Monroe County, FL

Significance: At the time the Florida East Coast Railway constructed this bridge it was acclaimed as the longest bridge in the world, an engineering marvel. It was the most costly of all Flagler's bridges in the Key West Extension. Since the beginning it has served as the one and only vital link between Miami and Key West. The logistics of assembling labor and materials and overcoming the difficulties presented by deep water, normal tides and hurricanes attest to the engineering and management skills of those connected with its construction.

Survey number: HAER FL-2

Building/structure dates: 1909- 1912 Initial Construction

Building/structure dates: 1938 Subsequent Work

railroad bridges vehicular bridges bridge construction transportation engineering civil engineering steel truss bridges marathon fla bridge seven mile bridge florida keys florida keys marathon monroe monroe county american bridge company c s coe b m duncan henry flager florida department of transportation historic american engineering record william j krome joseph c meredith photo ultra high resolution high resolution historic american landscapes survey historic american buildings survey architecture railroad railroad architecture assembly plants manufacturing plants library of congress

1912 - 1980

Library of Congress

http://www.loc.gov/

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