31 ST STR NO over I 59/20


+33.52856, -86.80436
33°31'43" N, 86°48'16" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:31 ST STR NO over I 59/20
Structure number:010493
Location:I59 * 31 ST STREET NO
Purpose:Carries highway overpass over highway
Route classification:Local (Urban) [19]
Length of largest span:103.0 ft. [31.4 m]
Total length:346.1 ft. [105.5 m]
Roadway width between curbs:67.9 ft. [20.7 m]
Deck width edge-to-edge:71.9 ft. [21.9 m]
Vertical clearance below bridge:15.4 ft. [4.7 m]
Skew angle:19°
Owner:State Highway Agency [01]
Year built:1971
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18 / HS 20 [5]
Number of main spans:4
Main spans material:Steel continuous [4]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Monolithic Concrete (concurrently placed with structural deck) [1]

Latest Available Inspection: April 2014 

Status:Open, no restriction [A]
Average daily traffic:6,100 [as of 2002]
Truck traffic:2% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Fair [5 out of 9]
Substructure condition:Satisfactory [6 out of 9]
Structural appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck geometry appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Underclearances appraisal:Meets minimum tolerable limits to be left in place as is [4]
Roadway alignment appraisal:Equal to present minimum criteria [6]
Scour condition:Bridge not over waterway. [N]
Operating rating:47.9 tons [43.5 metric tons]
Inventory rating:36.0 tons [32.7 metric tons]
Sufficiency rating:84.3
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$8,476,000

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
April 201484.3Not deficientSatisfactoryFairSatisfactory6100
April 201368.1Structurally deficientSatisfactoryPoorSatisfactory6100
April 201269.1Structurally deficientSatisfactoryPoorSatisfactory6100
April 201169.1Structurally deficientSatisfactoryPoorSatisfactory6100
April 201069.1Structurally deficientSatisfactoryPoorSatisfactory6100
April 200869.1Structurally deficientSatisfactoryPoorSatisfactory6100
April 200669.1Structurally deficientSatisfactoryPoorGood6100
April 200470.1Structurally deficientSatisfactoryPoorGood6100
April 200286.3Not deficientSatisfactoryFairGood6100
April 200084.3Not deficientSatisfactoryFairGood6100
May 199883.3Not deficientFairFairGood6050
March 199684.3Not deficientGoodFairGood6050
March 199483.5Not deficientGoodFairGood6000
October 199194.5Not deficientSatisfactorySatisfactoryGood6000