Structure 23602830804201 · Orleans County, LA

Us0090-b over La 428/ramps

Carries Us0090-b over La 428/ramps, 1.79 Mi South Of Miss. Ri.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructure8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,822 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 8/9

1,822 ft end to end, longest span 104 ft: about 5.1 football fields. 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 multi-beam bridge.

Built198937 years old
Length1821.9 ft555.3 m
Daily traffic67,143counted 2021
Last inspectedDecember 2023every 24 months

Location

StateLouisiana
CountyOrleans
Location1.79 Mi South Of Miss. Ri
CarriesUs0090-b
CrossesLa 428/ramps
Coordinates29.93217, -90.03830

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignStringer/Multi-beam
Total Length1821.9 ft (555.3 m)
Max Span104.0 ft (31.7 m)
Deck Width55.1 ft (16.8 m)
Deck Area9329.0 sq m
Main Spans23
Year Built1989

Traffic

Avg Daily Traffic67,143 (2021)
Truck Traffic25%
Lanes On Bridge3
Lanes Under Bridge4

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number023602830804201

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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