I 20 over I 55 TO I 20 WEST


+32.27722, -90.20983
32°16'38" N, 90°12'35" 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:16.1 ft. [4.9 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: July 2016

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:33,000 [as of 2014]
Truck traffic:13% 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]
Operating rating:64.4 tons [58.5 metric tons]
Inventory rating:38.6 tons [35.1 metric tons]
Sufficiency rating:75.1
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

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
July 201675.1FairFairFairVery Good-33000
August 201575.1FairFairFairVery Good-33000
August 201477.2FairFairFairVery Good-30000
July 201377.2FairFairFairVery Good-30000
August 201277.2FairFairFairVery Good-30000
July 201177.5FairFairFairVery Good-26000
November 201077.5FairFairFairVery Good-26000
September 200976.5FairFairFairFair-41500
July 200875.4FairFairFairFair-44500
August 200775.4FairFairFairFair-44500
September 200674.8FairFairSatisfactoryFair-54500
April 200589.6GoodGoodGoodVery Good-47500
November 200389.4GoodGoodGoodVery Good-51500
July 200290.0GoodGoodGoodVery Good-40000
July 200190.0GoodGoodGoodVery Good-40000
October 200089.0GoodGoodGoodVery Good-29500
August 199889.0GoodGoodGoodVery Good-29500
January 199788.9GoodGoodGoodVery Good-31000
February 199586.0GoodGoodGoodVery GoodFO35500
April 199186.4GoodGoodGoodVery GoodFO30500

Element Data

Source: National Bridge Elements dataset, 2016 edition. This feature is experimental.
ElementUnitsQuantity1. Good2. Fair3. Poor4. Serious
Steel Girder/Beamlinear ft.6,6506,6300200
Steel Protective Coatingsq. ft.111,342111,3220020
Reinforced Concrete Decksq. ft.52,86652,63822800
Wearing Surfacessq. ft.52,86652,8160050
Steel Pin or Pin & Hangar Assemblyeach4200420
Reinforced Concrete Columneach3838000
Reinforced Concrete Abutmentlinear ft.162162000
Reinforced Concrete Pier Caplinear ft.416416000
Pourable Jointlinear ft.357356001
Compression Jointlinear ft.5151000
Open Jointlinear ft.306000306
Assembly without Seal Jointlinear ft.51100041
Movable Bearingeach111061050
Steel Protective Coatingsq. ft.105001050
Fixed Bearingeach1414000
Steel Protective Coatingsq. ft.1414000
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.1,9551,955000