+30.34391, -90.98319
30°20'38" N, 90°58'59" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:LA0073 over BAYOU MANCHAC
Structure number:611700770400001
Purpose:Carries highway over waterway
Route classification:Minor Arterial (Urban) [16]
Length of largest span:82.0 ft. [25.0 m]
Total length:325.1 ft. [99.1 m]
Roadway width between curbs:24.0 ft. [7.3 m]
Deck width edge-to-edge:26.9 ft. [8.2 m]
Owner:State Highway Agency [01]
Year built:1931
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:M 13.5 / H 15 [2]
Number of main spans:5
Main spans material:Steel [3]
Main spans design:Truss - Thru [10]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Bituminous [6]

Latest Available Inspection: August 2017 

Good/Fair/Poor Condition:Poor
Status:Posted for load [P]
Average daily traffic:12,600 [as of 2015]
Truck traffic:18% of total traffic
Deck condition:Fair [5 out of 9]
Superstructure condition:Poor [4 out of 9]
Substructure condition:Satisfactory [6 out of 9]
Structural appraisal:Meets minimum tolerable limits to be left in place as is [4]
Deck geometry appraisal:Basically intolerable requiring high priority of replacement [2]
Water adequacy appraisal:Equal to present desirable criteria [8]
Roadway alignment appraisal:Equal to present minimum criteria [6]
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 assessed or calculated scour condition. [5]
Operating rating:37.0 tons [33.6 metric tons]
Inventory rating:22.0 tons [20.0 metric tons]
Sufficiency rating:34.6
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:$1,384,000

Previous Inspections 

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
August 201734.6PoorFairPoorSatisfactorySD12600
August 201534.2PoorFairPoorSatisfactorySD12600
June 201334.3PoorFairPoorSatisfactorySD12200
February 201134.3PoorFairPoorSatisfactorySD12100
February 200934.6PoorFairPoorSatisfactorySD11300
January 200846.3FairFairFairGoodFO10500
January 200746.6FairFairFairGoodFO9300
January 200646.6FairFairFairGoodFO9000
January 200558.1FairSatisfactoryGoodGoodFO8700
January 200458.1FairSatisfactoryGoodGoodFO8600
January 200358.1FairSatisfactoryGoodGoodFO8300
January 200258.4FairSatisfactoryGoodGoodFO6560
January 200158.4FairSatisfactoryGoodGoodFO6560
January 200058.4FairSatisfactoryGoodGoodFO6560
January 199946.6FairSatisfactoryGoodGoodSD6560
January 199847.6FairSatisfactoryGoodGoodSD6676
January 199747.7FairSatisfactoryGoodGoodSD6529
January 199647.7FairSatisfactoryGoodGoodSD7771
January 199550.2FairSatisfactoryGoodGoodFO4847
January 199450.3FairSatisfactoryGoodGoodFO4686
January 199350.3FairSatisfactoryGoodGoodFO4331
January 199250.3FairSatisfactoryGoodGoodFO4331