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 2016

Good/Fair/Poor Condition:Fair
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:55.9 tons [50.8 metric tons]
Inventory rating:33.9 tons [30.8 metric tons]
Sufficiency rating:83.1

Previous Inspections

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
October 201683.1FairSatisfactoryFairSatisfactory-30300
October 201582.9FairSatisfactoryFairSatisfactory-30300
October 201482.2FairSatisfactoryFairGood-37080
October 201382.3FairSatisfactoryFairGood-36000
November 201294.3FairSatisfactorySatisfactoryGood-31200
October 201182.9FairSatisfactoryFairGood-30660
November 200983.1FairGoodFairGood-28380
July 200883.3FairSatisfactoryFairSatisfactory-26820
August 200783.3FairSatisfactoryFairSatisfactory-26520
January 200566.8PoorSatisfactoryPoorSatisfactorySD24600
January 200366.7PoorSatisfactoryPoorSatisfactorySD25140
September 199968.6PoorGoodPoorGood-26068
March 199770.2PoorGoodPoorGood-20534
April 199498.0GoodGood---26704

Element Data

Source: National Bridge Elements dataset, 2016 edition. This feature is experimental.
ElementUnitsQuantity1. Good2. Fair3. Poor4. Serious
Steel Girder/Beamlinear ft.432432000
Prestressed Concrete Girder/Beamlinear ft.85,76485,764000
Reinforced Concrete Decksq. ft.649,88129,241620,64000
Prestressed Concrete Pileeach864864000
Reinforced Concrete Pileeach8552583000
Reinforced Concrete Pier Caplinear ft.19,0139,4139,60000
Open Jointlinear ft.3,2003,200000
Assembly without Seal Jointlinear ft.1,8401,8004000
Elastomeric Bearingeach6,5786,5620124
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.48,32048,320000
Reinforced Concrete Slabsq. ft.320,9200320,92000