US Bridges

LA0655 over Bayou Lafourche

PoorPosted for load

Lafourche Parish, Louisiana · .79 MI East of LA 1 · Structure no. 022908291400791

Built
1940
85 years old
Condition
Poor
inspected December 2024
Type
Movable - Swing
Steel
Length
250 ft
3 main spans
Daily traffic
2,380
2021 count
Owner
State
State Highway Agency

About this bridge

LA0655 over Bayou Lafourche is a steel movable - swing carrying LA0655 over Bayou Lafourche in Lafourche Parish, Louisiana. It was built in 1940, so it is 85 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 2,380 vehicles a day, roughly 13% of them trucks, projected to reach 2,618 by 2041. The structure is 250 ft (76.2 m) long and 27 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesLA0655
CrossesBayou Lafourche
Location.79 MI East of LA 1
RouteState Highway 655
Coordinates29.64652, -90.53702
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 inspectionDecember 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 alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating22.2 US tons
Inventory rating17.2 US tons

Structure

Structure typeMovable - Swing
MaterialSteel
DeckOpen grating
Main spans3
Design loadH 15
Structure length250 ft (76.2 m)
Longest span212 ft (64.6 m)
Deck width27 ft (8.3 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,380 (2021)
Projected traffic2,618 by 2041
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.1 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was LA0655 over Bayou Lafourche built?

It was built in 1940, making it 85 years old in 2025.

What condition is LA0655 over Bayou Lafourche 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 December 2024.

How much traffic does LA0655 over Bayou Lafourche carry?

About 2,380 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is LA0655 over Bayou Lafourche?

The structure is 250 ft (76.2 m) long with a longest span of 212 ft (64.6 m) and a deck 27 ft wide.

Who owns LA0655 over Bayou Lafourche?

It is owned by the State Highway Agency.