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I0310 over MISSISSIPPI RIVER

Map 

Coordinates:
+29.94553, -90.37233
29°56'44" N, 90°22'20" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.

Facts 

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 2015 

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:61.4 tons [55.8 metric tons]
Inventory rating:36.6 tons [33.3 metric tons]
Sufficiency rating:70.0

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
February 201570.0Not deficientGoodGoodGood54800
February 201370.0Not deficientGoodGoodGood44600
February 201236.0Structurally deficientGoodSeriousGood44400
February 201136.0Structurally deficientGoodSeriousGood43800
November 200936.0Structurally deficientGoodSeriousGood39800
August 200836.0Structurally deficientGoodSeriousGood39600
May 200736.0Structurally deficientGoodSeriousGood39000
April 200470.0Not deficientGoodSatisfactoryGood41900
March 200170.0Not deficientGoodSatisfactoryGood39892
April 199770.0Not deficientGoodSatisfactoryGood39892
December 199470.0Not deficientSatisfactorySatisfactoryGood31021
March 199170.0Not deficientGoodSatisfactoryGood9712