I0310 over US 61/RR/SWAMP/LA 626


+30.00135, -90.29419
30°00'05" N, 90°17'39" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:I0310 over US 61/RR/SWAMP/LA 626
Structure number:024504503600412
Location:0.41 M SOUTH OF I-10
Purpose:Carries highway over highway, waterway, and railroad
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:89.9 ft. [27.4 m]
Total length:25756.2 ft. [7850.1 m]
Roadway width between curbs:40.0 ft. [12.2 m]
Deck width edge-to-edge:43.0 ft. [13.1 m]
Vertical clearance above deck:16.7 ft. [5.1 m]
Vertical clearance below bridge:15.4 ft. [4.7 m]
Owner:State Highway Agency [01]
Year built:1992
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:465
Main spans material:Prestressed concrete [5]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]

Latest Available Inspection: October 2015 

Status:Open, no restriction [A]
Average daily traffic:30,300 [as of 2015]
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:Equal to present minimum criteria [6]
Underclearances appraisal:Equal to present minimum criteria [6]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Operating rating:55.4 tons [50.4 metric tons]
Inventory rating:33.7 tons [30.6 metric tons]
Sufficiency rating:82.9

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
October 201582.9Not deficientSatisfactoryFairSatisfactory30300
October 201482.2Not deficientSatisfactoryFairGood37080
October 201382.3Not deficientSatisfactoryFairGood36000
November 201294.3Not deficientSatisfactorySatisfactoryGood31200
October 201182.9Not deficientSatisfactoryFairGood30660
November 200983.1Not deficientGoodFairGood28380
July 200883.3Not deficientSatisfactoryFairSatisfactory26820
August 200783.3Not deficientSatisfactoryFairSatisfactory26520
January 200566.8Structurally deficientSatisfactoryPoorSatisfactory24600
January 200366.7Structurally deficientSatisfactoryPoorSatisfactory25140
September 199968.6Not deficientGoodPoorGood26068
20000.0Not applicable---7265
March 199770.2Not deficientGoodPoorGood20534
April 199498.0Not deficientGood--26704