+30.34311, -90.99340
30°20'35" N, 90°59'36" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:US0061 over BAYOU MANCHAC
Structure number:611700070800002
Location:1.46 MI S OF LA 948
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 2018

Good/Fair/Poor Condition:Poor
Status:Open, no restriction [A]
Average daily traffic:16,150 [as of 2016]
Truck traffic:9% of total traffic
Deck condition:Poor [4 out of 9]
Superstructure condition:Serious [3 out of 9]
Substructure condition:Satisfactory [6 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:Bank is beginning to slump. River control devices and embankment protection have widespread minor damage. There is minor stream bed movement evident. Debris is restricting the channel slightly. [6]
Scour condition:Bridge is scour critical; bridge foundations determined to be unstable. [3]
Sufficiency rating:23.7
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

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
March 2018PoorPoorSeriousSatisfactory1615023.7
March 2017PoorPoorSeriousSatisfactory1914022.2
March 2015PoorPoorSeriousSatisfactory1914022.2
March 2014PoorPoorSeriousSatisfactory1884026.1
January 2013PoorPoorSeriousFair1944025.9
December 2011PoorFairSeriousFair1902028.8
January 2011PoorFairSeriousFair1878028.9
January 2010PoorFairSeriousFair1836029.0
January 2009PoorFairPoorFair1764049.3
January 2008PoorSatisfactoryPoorSatisfactory1692047.5
January 2007PoorSatisfactoryPoorSatisfactory1668047.6
January 2006PoorSatisfactoryPoorSatisfactory1686047.6
January 2005FairSatisfactoryFairSatisfactory1638064.6
January 2004FairSatisfactoryFairSatisfactory1596064.7
January 2003FairSatisfactoryFairSatisfactory1560064.7
January 2002FairSatisfactoryFairSatisfactory1453664.9
January 2001FairSatisfactoryFairSatisfactory1453662.9
January 2000FairSatisfactoryFairSatisfactory685064.0
January 1999FairSatisfactoryFairSatisfactory685064.0
February 1998FairSatisfactoryFairSatisfactory685067.0
February 1997FairSatisfactoryFairSatisfactory1417965.9
February 1996FairSatisfactoryFairSatisfactory1390166.4
February 1995FairSatisfactoryFairSatisfactory1350966.4
February 1994FairSatisfactoryFairSatisfactory880667.0
February 1993FairSatisfactoryFairSatisfactory947866.9
February 1992FairSatisfactoryFairSatisfactory947866.9

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Reinforced Concrete Girder/Beamlinear ft.1,4001,3524800
Reinforced Concrete Decksq. ft.9,18402,2926,8920
Reinforced Concrete Abutmentlinear ft.88230650
Prestressed Concrete Pileeach32211100
Reinforced Concrete Pier Caplinear ft.1501250250
Open Jointlinear ft.245245000
Movable Bearingeach30001218
Steel Protective Coatingsq. ft.2300230
Fixed Bearingeach3000300
Steel Protective Coatingsq. ft.2300230
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.560554600