I0020 over MARSHALL ST/LA 1/RRS.


+32.50827, -93.74511
32°30'30" N, 93°44'42" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:I0020 over MARSHALL ST/LA 1/RRS.
Structure number:040904510118981
Location:I-20 OVER LA 1
Purpose:Carries highway overpass over highway and railroad
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:127.0 ft. [38.7 m]
Total length:1821.9 ft. [555.3 m]
Roadway width between curbs:28.2 ft. [8.6 m]
Deck width edge-to-edge:36.1 ft. [11.0 m]
Vertical clearance below bridge:16.4 ft. [5.0 m]
Owner:State Highway Agency [01]
Year built:1965
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:17
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: February 2016 

Status:Open, no restriction [A]
Average daily traffic:57,720 [as of 2015]
Truck traffic:29% 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:Basically intolerable requiring high priority of corrrective action [3]
Underclearances appraisal:Basically intolerable requiring high priority of replacement [2]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Operating rating:58.4 tons [53.1 metric tons]
Inventory rating:35.6 tons [32.4 metric tons]
Evaluation:Functionally obsolete [2]
Sufficiency rating:46.0
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:$7,105,000

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
February 201646.0Functionally obsoleteSatisfactoryFairSatisfactory57720
February 201546.0Functionally obsoleteSatisfactoryFairSatisfactory78120
February 201446.0Functionally obsoleteSatisfactoryFairSatisfactory75300
February 201346.0Functionally obsoleteSatisfactoryFairSatisfactory72480
February 201246.0Functionally obsoleteSatisfactoryFairSatisfactory62820
February 201146.0Functionally obsoleteSatisfactoryFairSatisfactory62820
March 201046.0Functionally obsoleteSatisfactoryFairSatisfactory61680
January 200946.0Functionally obsoleteSatisfactoryFairSatisfactory58440
February 200846.0Functionally obsoleteGoodFairGood56760
February 200746.0Functionally obsoleteVery GoodFairGood56460
March 200646.0Functionally obsoleteVery GoodFairGood55200
February 200546.0Functionally obsoleteVery GoodFairGood51900
March 200446.0Functionally obsoleteVery GoodFairGood48480
February 200345.7Functionally obsoleteVery GoodFairGood46560
May 200145.7Functionally obsoleteVery GoodFairGood48601
April 200045.7Functionally obsoleteSatisfactoryFairGood48601
20000.0Not applicable---45118
April 199945.7Functionally obsoleteSatisfactoryFairGood48601
March 199845.7Functionally obsoleteSatisfactoryFairGood48601
January 199745.7Functionally obsoleteSatisfactoryFairGood18770
June 199546.0Functionally obsoleteSatisfactoryFairGood35182
June 199446.0Functionally obsoleteSatisfactoryFairGood30925
May 199345.0Functionally obsoleteFairFairGood23074
April 199345.0Functionally obsoleteFairFairGood29213
March 199248.0Structurally deficientPoorFairGood29213