I0020 over COW BAYOU


+32.45617, -91.69100
32°27'22" N, 91°41'28" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I0020 over COW BAYOU
Structure number:054204510714501
Location:.3 MI EAST OF LA 583
Purpose:Carries highway over waterway
Route classification:Principal Arterial - Interstate (Rural) [01]
Length of largest span:7.9 ft. [2.4 m]
Total length:25.9 ft. [7.9 m]
Owner:State Highway Agency [01]
Year built:1969
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:3
Main spans material:Concrete [1]
Main spans design:Culvert [19]
Deck type:Concrete Cast-in-Place [1]

Latest Available Inspection: October 2017

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:30,100 [as of 2016]
Truck traffic:25% of total traffic
Structural appraisal:Unknown [*]
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]
Culvert condition:Deterioration or initial disintegration, minor chloride contamination, cracking with some leaching, or spalls on concrete or masonry walls and slabs. Local minor scouring at curtain walls, wingwalls or pipes. Metal culverts have a smooth curvature, non-symmetrical shape, significant corrosion or moderate pitting. [6]
Scour condition:Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Sufficiency rating:79.6

Previous Inspections

DateConditionCulvert ConditionADTSuff. Rating
October 2017Fair6 out of 103010079.6
October 2015Fair6 out of 102730079.9
November 2013Fair6 out of 102680080.0
November 2011Fair6 out of 102100080.6
November 2009Fair6 out of 102380080.3
September 2007Fair6 out of 102330077.4
September 2005Fair6 out of 102500077.2
March 2003Fair6 out of 102350077.3
August 2000Fair6 out of 102135977.6
July 1998Fair6 out of 102135977.6
July 1996Fair6 out of 101674078.1
June 1994Fair6 out of 102182678.0
May 1992Fair6 out of 101314378.8

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Reinforced Concrete Culvertlinear ft.585583200