+30.41843, -88.82775
30°25'06" N, 88°49'40" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:SR 609 over OLD FORT BAYOU
Structure number:310060903000020
Location:0.2 MI N US 90
Purpose:Carries highway over waterway
Route classification:Other Principal Arterial (Urban) [14]
Length of largest span:176.8 ft. [53.9 m]
Total length:1757.0 ft. [535.5 m]
Roadway width between curbs:60.0 ft. [18.3 m]
Deck width edge-to-edge:68.2 ft. [20.8 m]
Vertical clearance below bridge:19.7 ft. [6.0 m]
Owner:State Highway Agency [01]
Year built:1984
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:Concrete Cast-in-Place [1]

Latest Available Inspection: August 2017

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:36,000 [as of 2016]
Truck traffic:2% of total traffic
Deck condition:Fair [5 out of 9]
Superstructure condition:Satisfactory [6 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Equal to present minimum criteria [6]
Deck geometry appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
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 conditions; field review indicates action is required. [4]
Sufficiency rating:72.0

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
August 2017FairFairSatisfactoryGood3600072.0
August 2015FairFairSatisfactoryGood3500072.0
September 2013FairFairSatisfactoryGood3500072.0
July 2011FairGoodSatisfactoryGood3100086.4
August 2009GoodGoodGoodGood4200085.9
August 2008GoodGoodGoodGood4200086.9
November 2007GoodGoodGoodGood4200086.9
March 2006GoodGoodGoodGood3200087.4
September 2003GoodGoodGoodGood2600087.7
November 2002GoodVery GoodGoodVery Good2600087.7
August 2001GoodVery GoodGoodVery Good2700087.6
July 1999GoodVery GoodGoodVery Good1279088.4
July 1997GoodVery GoodGoodVery Good1279089.0
March 1997GoodVery GoodGoodVery Good1279089.0
August 1995GoodVery GoodGoodVery Good1279090.0
January 1995GoodVery GoodVery GoodVery Good1279090.0
December 1989GoodVery GoodVery GoodVery Good1279090.0

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Steel Girder/Beamlinear ft.70359855500
Steel Protective Coatingsq. ft.13,8551,38611,222693554
Prestressed Concrete Girder/Beamlinear ft.13,18113,1633150
Steel Stringerlinear ft.1,5541,304200500
Steel Protective Coatingsq. ft.7,69406,694769231
Reinforced Concrete Decksq. ft.115,090100,16214,5154130
Steel Floor Beamlinear ft.46436054500
Steel Protective Coatingsq. ft.9,1781207,7231,100235
Reinforced Concrete Pier Walllinear ft.1721391320
Reinforced Concrete Abutmentlinear ft.1961762000
Prestressed Concrete Pileeach2509315520
Reinforced Concrete Pier Caplinear ft.1,0391,036210
Open Grid Decksq. ft.5,7845,2062892890
Concrete Filled Grid Decksq. ft.2,1772,169530
Strip Seal Jointlinear ft.129000129
Pourable Jointlinear ft.140140000
Compression Jointlinear ft.2050157048
Open Jointlinear ft.1941464800
Elastomeric Bearingeach2171840330
Movable Bearingeach40400
Fixed Bearingeach67041260
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.1,9561,956000
Reinforced Concrete Bridge Raillinear ft.3,2313,231000