Structure 30108010901171 · Acadia County, LA

La0091 over B. Plaq. Brule/estherwoo

Carries La0091 over B. Plaq. Brule/estherwoo, 1.2 Mi N Of US 90.

Overall conditionPoor

Set by its lowest-rated component: Superstructure and Substructure at 4 of 9.

How ratings work
Deck5/9 · Fair
Superstructuresets the rating4/9 · Poor
Substructuresets the rating4/9 · Poor
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT357 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 4/9 · sets the ratingSubstructure 4/9 · sets the rating

357 ft end to end, longest span 162 ft: about 5 semi-trucks nose to tail. Lengths and the semi-truck 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 swing bridge (drawn closed).

Built197551 years old
Length357.0 ft108.8 m
Daily traffic1,617counted 2021
Last inspectedMay 2023every 24 months

Location

StateLouisiana
CountyAcadia
Location1.2 Mi N Of US 90
CarriesLa0091
CrossesB. Plaq. Brule/estherwoo
Coordinates30.19739, -92.46344

Physical Characteristics

MaterialSteel
DesignMovable - Swing
Total Length357.0 ft (108.8 m)
Max Span162.1 ft (49.4 m)
Deck Width26.9 ft (8.2 m)
Deck Area892.2 sq m
Main Spans10
Year Built1975

Traffic

Avg Daily Traffic1,617 (2021)
Truck Traffic13%
Lanes On Bridge1

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number030108010901171

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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