+30.34274, -90.99289
30°20'34" N, 90°59'34" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:US0061 over BAYOU MANCHAC
Structure number:611700070800001
Purpose:Carries highway over waterway
Route classification:Other Principal Arterial (Urban) [14]
Length of largest span:40.0 ft. [12.2 m]
Total length:279.9 ft. [85.3 m]
Roadway width between curbs:27.9 ft. [8.5 m]
Deck width edge-to-edge:32.5 ft. [9.9 m]
Skew angle:65°
Owner:State Highway Agency [01]
Year built:1953
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:7
Main spans material:Concrete [1]
Main spans design:Tee beam [04]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Monolithic Concrete (concurrently placed with structural deck) [1]

Latest Available Inspection: March 2017 

Good/Fair/Poor Condition:Poor
Status:Open, no restriction [A]
Average daily traffic:19,140 [as of 2015]
Truck traffic:11% of total traffic
Deck condition:Poor [4 out of 9]
Superstructure condition:Serious [3 out of 9]
Substructure condition:Fair [5 out of 9]
Structural appraisal:Basically intolerable requiring high priority of corrrective action [3]
Deck geometry appraisal:Basically intolerable requiring high priority of corrrective action [3]
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 is scour critical; bridge foundations determined to be unstable. [3]
Operating rating:40.6 tons [36.9 metric tons]
Inventory rating:31.4 tons [28.5 metric tons]
Sufficiency rating:22.2
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:$1,209,000

Previous Inspections 

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
March 201722.2PoorPoorSeriousFairSD19140
March 201522.2PoorPoorSeriousFairSD19140
March 201426.1PoorPoorSeriousFairSD18840
January 201325.9PoorPoorSeriousFairSD19440
December 201128.8PoorFairSeriousFairSD19020
January 201128.9PoorFairSeriousFairSD18780
January 201030.4PoorSatisfactorySeriousFairSD18360
January 200950.4PoorSatisfactoryPoorFairSD17640
January 200830.9PoorSatisfactorySeriousSatisfactorySD16920
January 200731.0PoorSatisfactorySeriousSatisfactorySD16680
January 200630.9PoorSatisfactorySeriousSatisfactorySD16860
January 200564.6FairSatisfactoryFairSatisfactoryFO16380
January 200464.7FairSatisfactoryFairSatisfactoryFO15960
January 200364.7FairSatisfactoryFairSatisfactoryFO15600
January 200264.9FairSatisfactoryFairSatisfactoryFO14536
January 200162.9FairSatisfactoryFairSatisfactoryFO14536
January 200064.0FairSatisfactoryFairSatisfactoryFO6850
January 199964.0FairSatisfactoryFairSatisfactoryFO6850
February 199867.0FairSatisfactoryFairSatisfactoryFO6850
February 199765.9FairSatisfactoryFairSatisfactoryFO14179
February 199666.4FairSatisfactoryFairSatisfactoryFO13901
February 199566.4FairSatisfactoryFairSatisfactoryFO13509
February 199467.0FairSatisfactoryFairSatisfactoryFO8806
February 199366.9FairSatisfactoryFairSatisfactoryFO9478
February 199266.9FairSatisfactoryFairSatisfactoryFO9478