US Bridges

LA0308-S over Bayou Lafourche

Fair

Lafourche Parish, Louisiana · .01 MI East of LA 1 · Structure no. 022904070112131

Built
1972
53 years old
Condition
Fair
inspected February 2024
Type
Movable - Lift
Steel
Length
254 ft
1 main span
Daily traffic
9,051
2021 count
Owner
State
State Highway Agency

About this bridge

LA0308-S over Bayou Lafourche is a steel movable - lift carrying LA0308-S over Bayou Lafourche in Lafourche Parish, Louisiana. It was built in 1972, so it is 53 years old, older than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 9,051 vehicles a day, roughly 6% of them trucks, projected to reach 9,956 by 2041. The structure is 254 ft (77.4 m) long and 30 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesLA0308-S
CrossesBayou Lafourche
Location.01 MI East of LA 1
RouteState Highway 308
CountyLafourche Parish
StateLouisiana
Coordinates29.47212, -90.31496
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating30 US tons
Inventory rating23.3 US tons

Structure

Structure typeMovable - Lift
MaterialSteel
DeckOpen grating
Main spans1 (+6 approach)
Design loadHS 20
Structure length254 ft (77.4 m)
Longest span104 ft (31.7 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deck17 ft (5.3 m)

Traffic and service

Average daily traffic9,051 (2021)
Projected traffic9,956 by 2041
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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$1.1 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was LA0308-S over Bayou Lafourche built?

It was built in 1972, making it 53 years old in 2025.

What condition is LA0308-S over Bayou Lafourche in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in February 2024.

How much traffic does LA0308-S over Bayou Lafourche carry?

About 9,051 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is LA0308-S over Bayou Lafourche?

The structure is 254 ft (77.4 m) long with a longest span of 104 ft (31.7 m) and a deck 30 ft wide.

Who owns LA0308-S over Bayou Lafourche?

It is owned by the State Highway Agency.