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I0310 over MISSISSIPPI RIVER

Map

Coordinates:
+29.94553, -90.37233
29°56'44" N, 90°22'20" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I0310 over MISSISSIPPI RIVER
Structure number:024504503700001
Location:I-310 OVER LA 48 AND LA 1
Purpose:Carries highway over waterway
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:1235.0 ft. [376.4 m]
Total length:2745.2 ft. [836.7 m]
Roadway width between curbs:76.4 ft. [23.3 m]
Deck width edge-to-edge:92.5 ft. [28.2 m]
Vertical clearance below bridge:132.9 ft. [40.5 m]
Owner:State Highway Agency [01]
Year built:1983
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:5
Main spans material:Steel continuous [4]
Main spans design:Stayed girder [14]
Deck type:Concrete Cast-in-Place [1]

Latest Available Inspection: February 2017

Good/Fair/Poor Condition:Good
Status:Open, no restriction [A]
Average daily traffic:54,800 [as of 2015]
Truck traffic:10% of total traffic
Deck condition:Good [7 out of 9]
Superstructure condition:Good [7 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Better than present minimum criteria [7]
Deck geometry appraisal:Superior to present desirable criteria [9]
Water adequacy appraisal:Equal to present desirable criteria [8]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Channel protection:Banks are protected or well vegetated. River control devices such as spur dikes and embankment protection are not required or are in a stable condition. [8]
Pier/abutment protection:In place and functioning [2]
Scour condition:Countermeasures have been installed to mitigate an existing problem with scour. [7]
Operating rating:61.8 tons [56.2 metric tons]
Inventory rating:37.0 tons [33.6 metric tons]
Sufficiency rating:70.0

Previous Inspections

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
February 201770.0GoodGoodGoodGood-54800
February 201570.0GoodGoodGoodGood-54800
February 201370.0GoodGoodGoodGood-44600
February 201236.0PoorGoodSeriousGoodSD44400
February 201136.0PoorGoodSeriousGoodSD43800
November 200936.0PoorGoodSeriousGoodSD39800
August 200836.0PoorGoodSeriousGoodSD39600
May 200736.0PoorGoodSeriousGoodSD39000
April 200470.0FairGoodSatisfactoryGood-41900
March 200170.0FairGoodSatisfactoryGood-39892
April 199770.0FairGoodSatisfactoryGood-39892
December 199470.0FairSatisfactorySatisfactoryGood-31021
March 199170.0FairGoodSatisfactoryGood-9712

Element Data

Source: National Bridge Elements dataset, 2016 edition. This feature is experimental.
ElementUnitsQuantity1. Good2. Fair3. Poor4. Serious
Superstructure
Steel Closed Web/Box Girderlinear ft.5,4904,7905002000
Steel Stringerlinear ft.112,545112,545000
Steel Main Cablelinear ft.236236000
Steel Floor Beamlinear ft.14,35014,350000
Substructure
Reinforced Concrete Pier Walllinear ft.1010000
Steel Pier Caplinear ft.180180000
Deck
Corrugated or Orthotropic Decksq. ft.225,090225,090000
Joints
Assembly with Sealeach164164000
Bearings
Movable Bearingeach2002000
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.10,98010,980000