Seaport Causeway over Biscayne Bay


+25.78000, -80.18333
25°46'48" N, 80°10'60" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:Seaport Causeway over Biscayne Bay
Structure number:874998
Location:Entrance to Port of Miami
Purpose:Carries highway and pedestrian walkway over waterway
Route classification:Minor Arterial (Urban) [16]
Length of largest span:106.0 ft. [32.3 m]
Total length:2239.0 ft. [682.4 m]
Roadway width between curbs:27.9 ft. [8.5 m]
Deck width edge-to-edge:37.4 ft. [11.4 m]
Vertical clearance below bridge:22.0 ft. [6.7 m]
Owner:County Highway Agency [02]
Year built:1964
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18 / HS 20 [5]
Main span material:Steel [3]
Main span design:Movable - Bascule [16]
Deck type:Open Grating [3]

Latest Available Inspection: January 2016 

Status:Bridge closed to all traffic [K]
Average daily traffic:1 [as of 2015]
Truck traffic:50% of total traffic
Deck condition:Fair [5 out of 9]
Superstructure condition:Fair [5 out of 9]
Substructure condition:Fair [5 out of 9]
Deck geometry appraisal:Better than present minimum criteria [7]
Water adequacy appraisal:Equal to present desirable criteria [8]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Channel protection:Bank protection is in need of minor repairs. River control devices and embankment protection have a little minor damage. Banks and/or channel have minor amounts of drift. [7]
Pier/abutment protection:In place and functioning [2]
Scour condition:Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Evaluation:Structurally deficient [1]
Sufficiency rating:40.0

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
January 201640.0Structurally deficientFairFairFair1
January 201440.0Structurally deficientFairFairFair1
January 201340.0Structurally deficientFairFairSatisfactory1
December 201140.0Structurally deficientFairFairSatisfactory1
December 200975.5Not deficientFairFairSatisfactory1
January 200875.5Not deficientFairFairSatisfactory1
February 200787.5Not deficientSatisfactorySatisfactoryGood1
January 200487.5Not deficientSatisfactorySatisfactoryGood1
March 200285.5Not deficientSatisfactorySatisfactoryGood10
August 200085.5Not deficientSatisfactorySatisfactoryGood10
September 199985.5Not deficientSatisfactorySatisfactoryGood10
July 199780.9Not deficientSatisfactorySatisfactoryGood2
October 199579.9Not deficientGoodSatisfactoryGood2
February 199468.9Not deficientSatisfactoryGoodFair-
December 199267.9Not deficientSatisfactorySatisfactoryFair-
November 199167.9Not deficientSatisfactorySatisfactoryFair5