I55 NB TO I20WB over I20 WB TO I55SB AND US51


+32.27569, -90.20483
32°16'32" N, 90°12'17" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I55 NB TO I20WB over I20 WB TO I55SB AND US51
Structure number:170005502509120
Location:0.4 MI N MCDOWELL RD
Purpose:Carries highway over highway
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:100.1 ft. [30.5 m]
Total length:432.1 ft. [131.7 m]
Roadway width between curbs:27.9 ft. [8.5 m]
Deck width edge-to-edge:32.8 ft. [10.0 m]
Vertical clearance below bridge:15.7 ft. [4.8 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:4
Main spans material:Concrete continuous [2]
Main spans design:Box Beam or girders - Single or Spread [06]
Deck type:Concrete Cast-in-Place [1]

Latest Available Inspection: June 2016

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:7,700 [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:Meets minimum tolerable limits to be left in place as is [4]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Inventory rating:70.6 tons [64.2 metric tons]
Sufficiency rating:75.1
Recommended work:Widening of existing bridge with deck rehabilitation or replacement. [34]
Estimated cost of work:$396,000,000

Previous Inspections

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
June 201675.1FairFairFairVery Good-7700
June 201461.4FairFairFairVery GoodFO7700
July 201261.4FairFairFairVery GoodFO7700
June 201061.4FairFairFairVery GoodFO7700
June 200873.3GoodGoodVery GoodVery GoodFO11000
September 200674.3GoodGoodVery GoodVery GoodFO11000
October 200476.4GoodVery GoodVery GoodVery GoodFO10000
August 200276.4GoodVery GoodVery GoodVery GoodFO10000
October 200076.6GoodVery GoodVery GoodVery GoodFO6000
August 199876.6GoodVery GoodVery GoodVery GoodFO6000
April 199777.0GoodVery GoodVery GoodVery GoodFO6000
January 199579.0GoodVery GoodVery GoodVery Good-5440
June 199179.0GoodVery GoodVery GoodVery Good-4950