Structure 35100050105491 · St. Mary County, LA

Us0090 over Ramos Bayou

Carries Us0090 over Ramos Bayou, 4.1 Mi East Of US 90.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 2 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating2/9 · Critical
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT466 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 2/9 · sets the rating

466 ft end to end, longest span 31 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 tee-beam bridge.

Built1932rebuilt 1989
Length465.9 ft142 m
Daily traffic7,504counted 2022
Last inspectedJune 2024every 12 months

Location

StateLouisiana
CountySt. Mary
Location4.1 Mi East Of US 90
CarriesUs0090
CrossesRamos Bayou
Coordinates29.67822, -91.13992

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length465.9 ft (142 m)
Max Span30.8 ft (9.4 m)
Deck Width43.0 ft (13.1 m)
Deck Area1860.2 sq m
Main Spans15
Year Built1932 (reconstructed 1989)

Traffic

Avg Daily Traffic7,504 (2022)
Truck Traffic9%
Lanes On Bridge1

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 12 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number035100050105491

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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