Structure 34900000030016 · St. Landry County, LA

La0107 over Rouge Bayou

Carries La0107 over Rouge Bayou, 5.25 Mi. E. Of US 71.

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 overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT120 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 8/9

120 ft end to end, longest span 20 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.

Built20206 years old
Length120.1 ft36.6 m
Daily traffic1,214counted 2021
Last inspectedApril 2024every 24 months

Location

StateLouisiana
CountySt. Landry
Location5.25 Mi. E. Of US 71
CarriesLa0107
CrossesRouge Bayou
Coordinates30.82033, -92.00969

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length120.1 ft (36.6 m)
Max Span20.0 ft (6.1 m)
Deck Width35.1 ft (10.7 m)
Deck Area391.6 sq m
Main Spans6
Year Built2020

Traffic

Avg Daily Traffic1,214 (2021)
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number034900000030016

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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