Structure 71201940200001 · Cameron County, LA

La0082 over Mermentau R./g.chenier

Carries La0082 over Mermentau R./g.chenier, 8.25 Mi. S Of Int La1143.

Overall conditionPoor

Set by its lowest-rated component: Deck and Superstructure and Substructure at 4 of 9.

How ratings work
Decksets the rating4/9 · Poor
Superstructuresets the rating4/9 · Poor
Substructuresets the rating4/9 · Poor
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,049 FT OVERALL200 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9Superstructure 4/9Substructure 4/9

1,049 ft end to end: about 2.9 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 swing bridge (drawn closed).

Built195967 years old
Length1048.9 ft319.7 m
Daily traffic2,899counted 2021
Last inspectedApril 2024every 12 months

Location

StateLouisiana
CountyCameron
Location8.25 Mi. S Of Int La1143
CarriesLa0082
CrossesMermentau R./g.chenier
Coordinates29.77046, -93.01450

Physical Characteristics

MaterialSteel
DesignMovable - Swing
Total Length1048.9 ft (319.7 m)
Max Span204.1 ft (62.2 m)
Deck Width28.9 ft (8.8 m)
Deck Area2813.4 sq m
Main Spans1
Year Built1959

Traffic

Avg Daily Traffic2,899 (2021)
Truck Traffic17%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 12 months
OwnerState Highway Agency
Historical SignificanceBridge is eligible for the National Register
Scour Critical7 — Countermeasures installed
Structure Number071201940200001

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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