How much did the replacement Seven Mile Bridge opened in 1982 cost to build?
The new Seven Mile Bridge carries US 1 between Marathon and the Lower Keys in Florida. Florida Department of Transportation records identify the 6.765-mile concrete segmental replacement bridge as a USD 45 million construction project: work began in 1979 and the bridge opened on 24 May 1982. It replaced, rather than renovated, the early-twentieth-century railway bridge that stands alongside it. The USD 45 million is for this bridge, not for the larger Florida Keys bridge-replacement programme.
Reported project cost
$45 million
Cost basis: 1982
The short answer
$45 million
Florida DOT records USD 45 million for the new Seven Mile Bridge, which was built from 1979 and opened on 24 May 1982. The State Archives of Florida independently records the same cost.
Cost evidence
Basis of the published figure
What the number includes
Cost scope
The USD 45 million is the reported construction cost of the 1982 replacement bridge between Marathon and the Lower Keys. It does not price the earlier railway bridge or the broader programme replacing dozens of bridges across the Keys.
Project metrics
Key dimensions
- Total lengthFIGG Bridge Group
- 10.932 km
Project record
24 May 1982
Project context
About Seven Mile Bridge
The new 6.765-mile concrete segmental bridge runs beside the original early-twentieth-century railway bridge. FDOT identifies it as one of the longest segmental bridges in the world at opening.
Reading the data
How to interpret the figure
The figure and opening date come from Florida DOT's historic-bridges study and are corroborated by the State Archives of Florida and the construction engineer's record. It is historical nominal USD, without inflation adjustment.