Seaport Causeway over Biscayne Bay


+25.77921, -80.18225
25°46'45" N, 80°10'56" 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:19.7 ft. [6.0 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 2018

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

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
January 2018FairFairFairFair140.0
January 2016FairFairFairFair140.0
January 2014FairFairFairFair140.0
January 2013FairFairFairSatisfactory140.0
December 2011FairFairFairSatisfactory140.0
December 2009FairFairFairSatisfactory175.5
January 2008FairFairFairSatisfactory175.5
February 2007FairSatisfactorySatisfactoryGood187.5
January 2004FairSatisfactorySatisfactoryGood187.5
March 2002FairSatisfactorySatisfactoryGood1085.5
August 2000FairSatisfactorySatisfactoryGood1085.5
September 1999FairSatisfactorySatisfactoryGood1085.5
July 1997FairSatisfactorySatisfactoryGood280.9
October 1995FairGoodSatisfactoryGood279.9
February 1994FairSatisfactoryGoodFair-68.9
December 1992FairSatisfactorySatisfactoryFair-67.9
November 1991FairSatisfactorySatisfactoryFair567.9