US Bridges

LA0582 over Mill Bayou

Good

West Carroll Parish, Louisiana · 2.6 MI E of LA 17 · Structure no. 056203330202601

Built
1983
42 years old
Condition
Good
inspected January 2023
Type
Slab
Concrete
Length
100 ft
5 main spans
Daily traffic
593
2021 count
Owner
State
State Highway Agency

About this bridge

LA0582 over Mill Bayou is a concrete slab carrying LA0582 over Mill Bayou in West Carroll Parish, Louisiana. It was built in 1983, so it is 42 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 593 vehicles a day, roughly 19% of them trucks, projected to reach 652 by 2041. The structure is 100 ft (30.5 m) long and 33 ft wide. If it were closed, the detour would be 13 mi (21 km).

CarriesLA0582
CrossesMill Bayou
Location2.6 MI E of LA 17
RouteState Highway 582
Coordinates32.773, -91.3744
Functional classRural Minor Collector

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 protection7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73 US tons
Inventory rating43 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 width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic593 (2021)
Projected traffic652 by 2041
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 LA0582 over Mill Bayou built?

It was built in 1983, making it 42 years old in 2025.

What condition is LA0582 over Mill 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 January 2023.

How much traffic does LA0582 over Mill Bayou carry?

About 593 vehicles per day (2021 count), of which roughly 19% are trucks.

How long is LA0582 over Mill Bayou?

The structure is 100 ft (30.5 m) long with a longest span of 20 ft (6.1 m) and a deck 33 ft wide.

Who owns LA0582 over Mill Bayou?

It is owned by the State Highway Agency.