Structure 22908292700011 · Lafourche County, LA

La3220 over Bayou Lafourche

Carries La3220 over Bayou Lafourche, .01 Mi East Of La 1.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT267 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

267 ft end to end: about 4 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 swing bridge (drawn closed).

Built198640 years old
Length267.1 ft81.4 m
Daily traffic3,859counted 2021
Last inspectedAugust 2023every 24 months

Location

StateLouisiana
CountyLafourche
Location.01 Mi East Of La 1
CarriesLa3220
CrossesBayou Lafourche
Coordinates29.63673, -90.51270

Physical Characteristics

MaterialSteel
DesignMovable - Swing
Total Length267.1 ft (81.4 m)
Max Span187.0 ft (57 m)
Deck Width34.8 ft (10.6 m)
Deck Area862.8 sq m
Main Spans1
Year Built1986

Traffic

Avg Daily Traffic3,859 (2021)
Truck Traffic11%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number022908292700011

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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