+30.34254, -90.99270
30°20'33" 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
Location:0.80 MI N OF LA 427
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: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:Bank protection is in need of minor repairs. River control devices and embankment protection have a little minor damage. Banks and/or channel have minor amounts of drift. [7]
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 2018PoorPoorSeriousFair1615023.7
March 2017PoorPoorSeriousFair1914022.2
March 2015PoorPoorSeriousFair1914022.2
March 2014PoorPoorSeriousFair1884026.1
January 2013PoorPoorSeriousFair1944025.9
December 2011PoorFairSeriousFair1902028.8
January 2011PoorFairSeriousFair1878028.9
January 2010PoorSatisfactorySeriousFair1836030.4
January 2009PoorSatisfactoryPoorFair1764050.4
January 2008PoorSatisfactorySeriousSatisfactory1692030.9
January 2007PoorSatisfactorySeriousSatisfactory1668031.0
January 2006PoorSatisfactorySeriousSatisfactory1686030.9
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.1,4001,32363140
Reinforced Concrete Decksq. ft.9,184009,1840
Reinforced Concrete Columneach3252610
Reinforced Concrete Abutmentlinear ft.88760120
Reinforced Concrete Pier Caplinear ft.1501279140
Open Jointlinear ft.245245000
Movable Bearingeach3000300
Fixed Bearingeach3003000
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.5605480012