I 20 over I 55 TO I 20 WEST


+32.27595, -90.20999
32°16'33" N, 90°12'36" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I 20 over I 55 TO I 20 WEST
Structure number:11000200250449B
Location:3.7 MI E SR 18
Purpose:Carries highway over highway
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:134.8 ft. [41.1 m]
Total length:979.1 ft. [298.4 m]
Roadway width between curbs:50.9 ft. [15.5 m]
Deck width edge-to-edge:54.1 ft. [16.5 m]
Vertical clearance below bridge:13.1 ft. [4.0 m]
Owner:State Highway Agency [01]
Year built:1966
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18+Mod / HS 20+Mod [6]
Number of main spans:12
Main spans material:Steel continuous [4]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]

Latest Available Inspection: August 2018

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:38,000 [as of 2017]
Truck traffic:16% of total traffic
Deck condition:Fair [5 out of 9]
Superstructure condition:Fair [5 out of 9]
Substructure condition:Very Good [8 out of 9]
Structural appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck geometry appraisal:Superior to present desirable criteria [9]
Underclearances appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Roadway alignment appraisal:Better than present minimum criteria [7]
Scour condition:Bridge not over waterway. [N]
Sufficiency rating:74.5
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:$999,999,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
August 2018FairFairFairVery Good3800074.5
July 2016FairFairFairVery Good3300075.1
August 2015FairFairFairVery Good3300075.1
August 2014FairFairFairVery Good3000077.2
July 2013FairFairFairVery Good3000077.2
August 2012FairFairFairVery Good3000077.2
July 2011FairFairFairVery Good2600077.5
November 2010FairFairFairVery Good2600077.5
September 2009FairFairFairFair4150076.5
July 2008FairFairFairFair4450075.4
August 2007FairFairFairFair4450075.4
September 2006FairFairSatisfactoryFair5450074.8
April 2005GoodGoodGoodVery Good4750089.6
November 2003GoodGoodGoodVery Good5150089.4
July 2002GoodGoodGoodVery Good4000090.0
July 2001GoodGoodGoodVery Good4000090.0
October 2000GoodGoodGoodVery Good2950089.0
August 1998GoodGoodGoodVery Good2950089.0
January 1997GoodGoodGoodVery Good3100088.9
February 1995GoodGoodGoodVery Good3550086.0
April 1991GoodGoodGoodVery Good3050086.4

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Steel Girder/Beamlinear ft.6,6506,6160340
Steel Protective Coatingsq. ft.111,342111,3080034
Reinforced Concrete Decksq. ft.52,99352,9662700
Wearing Surfacessq. ft.52,93350,773002,160
Steel Pin or Pin & Hangar Assemblyeach4200420
Reinforced Concrete Columneach3838000
Reinforced Concrete Abutmentlinear ft.162162000
Reinforced Concrete Pier Caplinear ft.416416000
Pourable Jointlinear ft.3573210036
Compression Jointlinear ft.5151000
Open Jointlinear ft.3062460060
Assembly without Seal Jointlinear ft.124008
Movable Bearingeach111061050
Steel Protective Coatingsq. ft.105001050
Fixed Bearingeach1414000
Steel Protective Coatingsq. ft.1414000
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.1,9581,953500