US Bridges

LA0091 over Little Bayou

Fair

Acadia Parish, Louisiana · 3.2 MI North of LA 100 · Structure no. 030102110205571

Built
1954
71 years old
Condition
Fair
inspected December 2023
Type
Slab
Concrete
Length
100 ft
5 main spans
Daily traffic
1,617
2021 count
Owner
State
State Highway Agency

About this bridge

LA0091 over Little Bayou is a concrete slab carrying LA0091 over Little Bayou in Acadia Parish, Louisiana. It was built in 1954, so it is 71 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 1,617 vehicles a day, roughly 13% of them trucks, projected to reach 1,778 by 2041. The structure is 100 ft (30.5 m) long and 29 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesLA0091
CrossesLittle Bayou
Location3.2 MI North of LA 100
RouteState Highway 91
CountyAcadia Parish
StateLouisiana
Coordinates30.3134, -92.49795
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 protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
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 rating50 US tons
Inventory rating30 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadH 15
Structure length100 ft (30.5 m)
Longest span20 ft (6.1 m)
Deck width29 ft (8.9 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,617 (2021)
Projected traffic1,778 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 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 LA0091 over Little Bayou built?

It was built in 1954, making it 71 years old in 2025.

What condition is LA0091 over Little 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 December 2023.

How much traffic does LA0091 over Little Bayou carry?

About 1,617 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is LA0091 over Little Bayou?

The structure is 100 ft (30.5 m) long with a longest span of 20 ft (6.1 m) and a deck 29 ft wide.

Who owns LA0091 over Little Bayou?

It is owned by the State Highway Agency.