I0310 over I-310 OVER LA 3127


+29.91254, -90.40836
29°54'45" N, 90°24'30" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:I0310 over I-310 OVER LA 3127
Structure number:024504503802411
Location:1.57 MI. N. OF US 90
Purpose:Carries highway over highway and waterway
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:124.0 ft. [37.8 m]
Total length:2523.1 ft. [769.0 m]
Roadway width between curbs:40.0 ft. [12.2 m]
Deck width edge-to-edge:42.7 ft. [13.0 m]
Vertical clearance below bridge:17.7 ft. [5.4 m]
Skew angle:59°
Owner:State Highway Agency [01]
Year built:1986
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:28
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: May 2014 

Status:Open, no restriction [A]
Average daily traffic:41,600 [as of 2014]
Truck traffic:7% of total traffic
Deck condition:Satisfactory [6 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:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Underclearances appraisal:Equal to present minimum criteria [6]
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]
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:91.2

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
May 201491.2Not deficientSatisfactoryGoodGood41600
June 201291.2Not deficientGoodGoodGood35200
July 201091.2Not deficientVery GoodSatisfactoryVery Good34600
August 200891.2Not deficientVery GoodSatisfactoryVery Good31200
August 200780.2Not deficientVery GoodFairVery Good30100
May 200680.2Not deficientVery GoodFairVery Good28500
January 200580.2Not deficientVery GoodFairVery Good27400
January 200392.0Not deficientVery GoodVery GoodVery Good30100
February 200192.0Not deficientVery GoodVery GoodVery Good29928
October 199792.0Not deficientVery GoodVery GoodVery Good29928
November 199492.0Not deficientVery GoodVery GoodVery Good17000
September 199292.0Not deficientVery GoodVery GoodVery Good9712
August 199092.0Not deficientVery GoodVery GoodVery Good9712