US Bridges

LA0100 over Bayou Plaquemine Brule

FairPosted for load

Acadia Parish, Louisiana · .58 MI West of LA 13 · Structure no. 030102110100581

Built
1949
76 years old
Condition
Fair
inspected March 2023
Type
Tee Beam
Concrete
Length
529 ft
22 main spans
Daily traffic
4,120
2019 count
Owner
State
State Highway Agency

About this bridge

LA0100 over Bayou Plaquemine Brule is a concrete tee beam carrying LA0100 over Bayou Plaquemine Brule in Acadia Parish, Louisiana. It was built in 1949, so it is 76 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. Its operating status is: posted for load restriction.

It carries about 4,120 vehicles a day, roughly 9% of them trucks, projected to reach 4,532 by 2039. The structure is 529 ft (161.2 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesLA0100
CrossesBayou Plaquemine Brule
Location.58 MI West of LA 13
RouteState Highway 100
CountyAcadia Parish
StateLouisiana
Coordinates30.23621, -92.3955
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34 US tons
Inventory rating20 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans22
Design loadH 15
Structure length529 ft (161.2 m)
Longest span24 ft (7.3 m)
Deck width29 ft (8.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,120 (2019)
Projected traffic4,532 by 2039
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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$2.2 million
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0100 over Bayou Plaquemine Brule built?

It was built in 1949, making it 76 years old in 2025.

What condition is LA0100 over Bayou Plaquemine Brule 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 March 2023.

How much traffic does LA0100 over Bayou Plaquemine Brule carry?

About 4,120 vehicles per day (2019 count), of which roughly 9% are trucks.

How long is LA0100 over Bayou Plaquemine Brule?

The structure is 529 ft (161.2 m) long with a longest span of 24 ft (7.3 m) and a deck 29 ft wide.

Who owns LA0100 over Bayou Plaquemine Brule?

It is owned by the State Highway Agency.