Structure 25502470204101 · Terrebonne County, LA

La0056 over Boudreaux Canal

Carries La0056 over Boudreaux Canal, 7.2 Mi South Of La 58.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 3 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating3/9 · Serious
Substructure6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT284 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 3/9 · sets the ratingSubstructure 6/9

284 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).

Built195967 years old
Length284.1 ft86.6 m
Daily traffic3,872counted 2021
Last inspectedJune 2024every 12 months

Location

StateLouisiana
CountyTerrebonne
Location7.2 Mi South Of La 58
CarriesLa0056
CrossesBoudreaux Canal
Coordinates29.38574, -90.62000

Physical Characteristics

MaterialSteel
DesignMovable - Swing
Total Length284.1 ft (86.6 m)
Max Span180.1 ft (54.9 m)
Deck Width29.9 ft (9.1 m)
Deck Area788.1 sq m
Main Spans1
Year Built1959

Traffic

Avg Daily Traffic3,872 (2021)
Truck Traffic13%
Lanes On Bridge2

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 Number025502470204101

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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