Structure 25504240706351 · Terrebonne County, LA

Us0090 over Deadwood RD Tiger Bayou

Carries Us0090 over Deadwood RD Tiger Bayou, .04 Mi East Of La 3052.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure8/9 · Very Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
7,703 FT OVERALL1,000 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 8/9Substructure 6/9 · sets the rating

7,703 ft end to end, longest span 70 ft: about 21 football fields, or 1.5 miles. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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 multi-beam bridge.

Built199432 years old
Length7703.1 ft2347.9 m
Daily traffic4,014counted 2021
Last inspectedOctober 2023every 24 months

Location

StateLouisiana
CountyTerrebonne
Location.04 Mi East Of La 3052
CarriesUs0090
CrossesDeadwood RD Tiger Bayou
Coordinates29.69180, -90.97900

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length7703.1 ft (2347.9 m)
Max Span69.9 ft (21.3 m)
Deck Width43.0 ft (13.1 m)
Deck Area30757.5 sq m
Main Spans107
Year Built1994

Traffic

Avg Daily Traffic4,014 (2021)
Truck Traffic18%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number025504240706351

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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