Structure 25500000020420 · Terrebonne County, LA

Us0090 over Drain Canal

Carries Us0090 over Drain Canal, One Mile East Of La 24.

Overall conditionGood

Set by its lowest-rated component: Culvert at 7 of 9.

How ratings work
Culvertsets the rating7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT38 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 38 ft across. 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.

Built198046 years old
Length38.1 ft11.6 m
Daily traffic12,998counted 2021
Last inspectedMay 2024every 24 months

Location

StateLouisiana
CountyTerrebonne
LocationOne Mile East Of La 24
CarriesUs0090
CrossesDrain Canal
Coordinates29.68053, -90.77290

Physical Characteristics

MaterialSteel
DesignCulvert
Total Length38.1 ft (11.6 m)
Max Span38.1 ft (11.6 m)
Deck Width242.1 ft (73.8 m)
Deck Area856.1 sq m
Main Spans1
Year Built1980

Traffic

Avg Daily Traffic12,998 (2021)
Truck Traffic18%
Lanes On Bridge4

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number025500000020420

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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