US Bridges

LA0001 over Labutte Bayou

Good

Iberville Parish, Louisiana · LA 1 · Structure no. 612400500609941

Built
1985
40 years old
Condition
Good
inspected May 2023
Type
Slab
Concrete
Length
100 ft
5 main spans
Daily traffic
5,075
2021 count
Owner
State
State Highway Agency

About this bridge

LA0001 over Labutte Bayou is a concrete slab carrying LA0001 over Labutte Bayou in Iberville Parish, Louisiana. It was built in 1985, so it is 40 years old, younger than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 5,075 vehicles a day, roughly 17% of them trucks, projected to reach 5,582 by 2041. The structure is 100 ft (30.5 m) long and 43 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesLA0001
CrossesLabutte Bayou
LocationLA 1
RouteState Highway 1
Coordinates30.2367, -91.20286
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length100 ft (30.5 m)
Longest span20 ft (6.1 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,075 (2021)
Projected traffic5,582 by 2041
Trucks17%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemYes

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 LA0001 over Labutte Bayou built?

It was built in 1985, making it 40 years old in 2025.

What condition is LA0001 over Labutte Bayou in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.

How much traffic does LA0001 over Labutte Bayou carry?

About 5,075 vehicles per day (2021 count), of which roughly 17% are trucks.

How long is LA0001 over Labutte Bayou?

The structure is 100 ft (30.5 m) long with a longest span of 20 ft (6.1 m) and a deck 43 ft wide.

Who owns LA0001 over Labutte Bayou?

It is owned by the State Highway Agency.