US Bridges

LA0056 over Boudreaux Canal

PoorPosted for load

Terrebonne Parish, Louisiana · 7.2 MI South of LA 58 · Structure no. 025502470204101

Built
1959
66 years old
Condition
Poor
inspected June 2024
Type
Movable - Swing
Steel
Length
284 ft
1 main span
Daily traffic
3,872
2021 count
Owner
State
State Highway Agency

About this bridge

LA0056 over Boudreaux Canal is a steel movable - swing carrying LA0056 over Boudreaux Canal in Terrebonne Parish, Louisiana. It was built in 1959, so it is 66 years old, older than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 3,872 vehicles a day, roughly 13% of them trucks, projected to reach 4,259 by 2041. The structure is 284 ft (86.6 m) long and 30 ft wide. If it were closed, the detour would be 21.1 mi (34 km).

Location

Open in Google Maps
CarriesLA0056
CrossesBoudreaux Canal
Location7.2 MI South of LA 58
RouteState Highway 56
CountyTerrebonne Parish
StateLouisiana
Coordinates29.38574, -90.62
Functional classUrban Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating17.9 US tons
Inventory rating13.9 US tons

Structure

Structure typeMovable - Swing
MaterialSteel
DeckOpen grating
Main spans1 (+5 approach)
Design loadH 15
Structure length284 ft (86.6 m)
Longest span180 ft (54.9 m)
Deck width30 ft (9.1 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,872 (2021)
Projected traffic4,259 by 2041
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.1 mi (34 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.2 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was LA0056 over Boudreaux Canal built?

It was built in 1959, making it 66 years old in 2025.

What condition is LA0056 over Boudreaux Canal in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.

How much traffic does LA0056 over Boudreaux Canal carry?

About 3,872 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is LA0056 over Boudreaux Canal?

The structure is 284 ft (86.6 m) long with a longest span of 180 ft (54.9 m) and a deck 30 ft wide.

Who owns LA0056 over Boudreaux Canal?

It is owned by the State Highway Agency.