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 

Good/Fair/Poor Condition:Fair
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]
Sufficiency rating:40.0

Previous Inspections 

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
January 201640.0FairFairFairFairSD1
January 201440.0FairFairFairFairSD1
January 201340.0FairFairFairSatisfactorySD1
December 201140.0FairFairFairSatisfactorySD1
December 200975.5FairFairFairSatisfactory-1
January 200875.5FairFairFairSatisfactory-1
February 200787.5FairSatisfactorySatisfactoryGood-1
January 200487.5FairSatisfactorySatisfactoryGood-1
March 200285.5FairSatisfactorySatisfactoryGood-10
August 200085.5FairSatisfactorySatisfactoryGood-10
September 199985.5FairSatisfactorySatisfactoryGood-10
July 199780.9FairSatisfactorySatisfactoryGood-2
October 199579.9FairGoodSatisfactoryGood-2
February 199468.9FairSatisfactoryGoodFair--
December 199267.9FairSatisfactorySatisfactoryFair--
November 199167.9FairSatisfactorySatisfactoryFair-5