Structure 35104240507272 · St. Mary County, LA

Us0090 over Choupique Bayou

Carries Us0090 over Choupique Bayou, 0.2 Mi. NW Of La 83.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT460 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 5/9 · sets the rating

460 ft end to end, longest span 55 ft: about 6 semi-trucks nose to tail. 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.

Built197848 years old
Length460.0 ft140.2 m
Daily traffic10,070counted 2021
Last inspectedNovember 2023every 24 months

Location

StateLouisiana
CountySt. Mary
Location0.2 Mi. NW Of La 83
CarriesUs0090
CrossesChoupique Bayou
Coordinates29.83653, -91.56713

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length460.0 ft (140.2 m)
Max Span55.1 ft (16.8 m)
Deck Width43.6 ft (13.3 m)
Deck Area1864.7 sq m
Main Spans2
Year Built1978

Traffic

Avg Daily Traffic10,070 (2021)
Truck Traffic14%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number035104240507272

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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