US Bridges

LA0365 over Bayou Plaquemine

Fair

Acadia Parish, Louisiana · 2.1 MI East of LA 367 · Structure no. 030102200106141

Built
1952
73 years old
Condition
Fair
inspected November 2024
Type
Tee Beam
Concrete
Length
240 ft
10 main spans
Daily traffic
1,570
2021 count
Owner
State
State Highway Agency

About this bridge

LA0365 over Bayou Plaquemine is a concrete tee beam carrying LA0365 over Bayou Plaquemine in Acadia Parish, Louisiana. It was built in 1952, so it is 73 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 6 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 1,570 vehicles a day, roughly 13% of them trucks, projected to reach 1,727 by 2041. The structure is 240 ft (73.2 m) long and 30 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesLA0365
CrossesBayou Plaquemine
Location2.1 MI East of LA 367
RouteState Highway 365
CountyAcadia Parish
StateLouisiana
Coordinates30.35494, -92.2993
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating24 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans10
Design loadH 15
Structure length240 ft (73.2 m)
Longest span24 ft (7.3 m)
Deck width30 ft (9 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,570 (2021)
Projected traffic1,727 by 2041
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0365 over Bayou Plaquemine built?

It was built in 1952, making it 73 years old in 2025.

What condition is LA0365 over Bayou Plaquemine 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 November 2024.

How much traffic does LA0365 over Bayou Plaquemine carry?

About 1,570 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is LA0365 over Bayou Plaquemine?

The structure is 240 ft (73.2 m) long with a longest span of 24 ft (7.3 m) and a deck 30 ft wide.

Who owns LA0365 over Bayou Plaquemine?

It is owned by the State Highway Agency.