US Bridges

LA0134 over Alligator Bayou

Fair

West Carroll Parish, Louisiana · 3.1 MI East of LA 17 · Structure no. 056201610703081

Built
1951
74 years old
Condition
Fair
inspected January 2023
Type
Tee Beam
Concrete
Length
74 ft
3 main spans
Daily traffic
759
2021 count
Owner
State
State Highway Agency

About this bridge

LA0134 over Alligator Bayou is a concrete tee beam carrying LA0134 over Alligator Bayou in West Carroll Parish, Louisiana. It was built in 1951, so it is 74 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 759 vehicles a day, roughly 15% of them trucks, projected to reach 834 by 2041. The structure is 74 ft (22.6 m) long and 29 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesLA0134
CrossesAlligator Bayou
Location3.1 MI East of LA 17
RouteState Highway 134
CountyWest Carroll Parish
StateLouisiana
Coordinates32.61897, -91.4333
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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating53 US tons
Inventory rating32 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length74 ft (22.6 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 traffic759 (2021)
Projected traffic834 by 2041
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0134 over Alligator Bayou built?

It was built in 1951, making it 74 years old in 2025.

What condition is LA0134 over Alligator Bayou 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 January 2023.

How much traffic does LA0134 over Alligator Bayou carry?

About 759 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is LA0134 over Alligator Bayou?

The structure is 74 ft (22.6 m) long with a longest span of 24 ft (7.3 m) and a deck 29 ft wide.

Who owns LA0134 over Alligator Bayou?

It is owned by the State Highway Agency.