Structure 25502450207341 · Terrebonne County, LA

La0315 over Falgout Canal

Carries La0315 over Falgout Canal, 11.0 Mi South Of La 661.

Overall conditionPoor

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating4/9 · Poor
Substructure5/9 · Fair
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT202 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 4/9 · sets the ratingSubstructure 5/9

202 ft end to end: about 3 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).

Built196462 years old
Length202.1 ft61.6 m
Daily traffic2,378counted 2021
Last inspectedNovember 2024every 12 months

Location

StateLouisiana
CountyTerrebonne
Location11.0 Mi South Of La 661
CarriesLa0315
CrossesFalgout Canal
Coordinates29.41173, -90.78320

Physical Characteristics

MaterialSteel
DesignMovable - Swing
Total Length202.1 ft (61.6 m)
Max Span134.8 ft (41.1 m)
Deck Width34.1 ft (10.4 m)
Deck Area640.6 sq m
Main Spans1
Year Built1964

Traffic

Avg Daily Traffic2,378 (2021)
Truck Traffic12%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 12 months
OwnerState Highway Agency
Historical SignificanceBridge is eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number025502450207341

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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