Structure 25529386904481 · Terrebonne County, LA

Bayou Gardens BLVD over St. Louis Canal

Carries Bayou Gardens BLVD over St. Louis Canal, 0.3 West Of La 660.

Overall conditionFair

Set by its lowest-rated component: Culvert at 6 of 9.

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

Elevation

Side view, colored by inspection rating
CAR · 15 FT29 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 6/9

A culvert 29 ft across with 3 openings. 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, so those are drawn as typical for a culvert.

Built199531 years old
Length28.9 ft8.8 m
Daily traffic10,255counted 2021
Last inspectedMay 2023every 24 months

Location

StateLouisiana
CountyTerrebonne
Location0.3 West Of La 660
CarriesBayou Gardens BLVD
CrossesSt. Louis Canal
Coordinates29.64736, -90.73133

Physical Characteristics

MaterialSteel
DesignCulvert
Total Length28.9 ft (8.8 m)
Max Span7.9 ft (2.4 m)
Deck Width109.9 ft (33.5 m)
Deck Area294.8 sq m
Main Spans3
Year Built1995

Traffic

Avg Daily Traffic10,255 (2021)
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number025529386904481

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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