Structure 22900000200888 · Lafourche County, LA

Alario Bridge RD over Drain Canal

Carries Alario Bridge RD over Drain Canal, 0.3 Mile SW Of La 3235.

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
CAR · 15 FT100 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 8/9

100 ft end to end, longest span 20 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 slab bridge.

Built201115 years old
Length100.1 ft30.5 m
Daily traffic530counted 2020
Last inspectedJune 2023every 24 months

Location

StateLouisiana
CountyLafourche
Location0.3 Mile SW Of La 3235
CarriesAlario Bridge RD
CrossesDrain Canal
Coordinates29.39246, -90.27504

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length100.1 ft (30.5 m)
Max Span20.0 ft (6.1 m)
Deck Width28.5 ft (8.7 m)
Deck Area265.4 sq m
Main Spans5
Year Built2011

Traffic

Avg Daily Traffic530 (2020)
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number022900000200888

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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