Structure 32329575915421 · Iberia County, LA

Migues RD over Bayou Petite Anse

Carries Migues RD over Bayou Petite Anse, 2.3 Mi. W. Of La 329.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT133 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

133 ft end to end, longest span 19 ft. 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 slab bridge.

Built198442 years old
Length132.9 ft40.5 m
Daily traffic646counted 2020
Last inspectedOctober 2024every 24 months

Location

StateLouisiana
CountyIberia
Location2.3 Mi. W. Of La 329
CarriesMigues RD
CrossesBayou Petite Anse
Coordinates29.95899, -91.90212

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length132.9 ft (40.5 m)
Max Span19.0 ft (5.8 m)
Deck Width26.9 ft (8.2 m)
Deck Area332.1 sq m
Main Spans7
Year Built1984

Traffic

Avg Daily Traffic646 (2020)
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number032329575915421

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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