Structure 22900650110631 · Lafourche County, LA

La0024 over St. Louis Bayou

Carries La0024 over St. Louis Bayou, 10.6 Mi West Of La 1.

Overall conditionFair

Set by its lowest-rated component: Deck and Substructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT78 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 6/9 · sets the rating

78 ft end to end. 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 multi-beam bridge.

Built197551 years old
Length78.1 ft23.8 m
Daily traffic5,271counted 2021
Last inspectedFebruary 2023every 24 months

Location

StateLouisiana
CountyLafourche
Location10.6 Mi West Of La 1
CarriesLa0024
CrossesSt. Louis Bayou
Coordinates29.55144, -90.53010

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length78.1 ft (23.8 m)
Max Span38.1 ft (11.6 m)
Deck Width43.0 ft (13.1 m)
Deck Area311.8 sq m
Main Spans1
Year Built1975

Traffic

Avg Daily Traffic5,271 (2021)
Truck Traffic20%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number022900650110631

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.

Nearby Bridges