Structure 581501780105751 · Concordia County, LA

La0909 over Six Mile Bayou

Carries La0909 over Six Mile Bayou, 3.1 Mi South Of La 126.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 8 of 9.

How ratings work
Decksets the rating8/9 · Very Good
Superstructuresets the rating8/9 · Very Good
Substructuresets the rating8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT57 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 8/9

57 ft end to end, longest span 19 ft. Lengths and the car on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a slab bridge.

Built200323 years old
Length57.1 ft17.4 m
Daily traffic68counted 2021
Last inspectedMarch 2024every 24 months

Location

StateLouisiana
CountyConcordia
Location3.1 Mi South Of La 126
CarriesLa0909
CrossesSix Mile Bayou
Coordinates31.33360, -91.85170

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length57.1 ft (17.4 m)
Max Span19.0 ft (5.8 m)
Deck Width34.8 ft (10.6 m)
Deck Area184.4 sq m
Main Spans3
Year Built2003

Traffic

Avg Daily Traffic68 (2021)
Truck Traffic11%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number581501780105751

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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