Structure 32304003100911 · Iberia County, LA

La0086 over Drainage Canal

Carries La0086 over Drainage Canal, 0.91 Mi West Of La 347.

Overall conditionFair

Set by its lowest-rated component: Superstructure and Substructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating5/9 · Fair
Substructuresets the rating5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT76 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9 · sets the ratingSubstructure 5/9 · sets the rating

76 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 multi-beam bridge.

Built198046 years old
Length76.1 ft23.2 m
Daily traffic3,834counted 2021
Last inspectedFebruary 2023every 24 months

Location

StateLouisiana
CountyIberia
Location0.91 Mi West Of La 347
CarriesLa0086
CrossesDrainage Canal
Coordinates30.04064, -91.80690

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length76.1 ft (23.2 m)
Max Span19.0 ft (5.8 m)
Deck Width42.3 ft (12.9 m)
Deck Area299.3 sq m
Main Spans4
Year Built1980

Traffic

Avg Daily Traffic3,834 (2021)
Truck Traffic9%
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 Number032304003100911

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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