US Bridges

LA0586 over Tiger Bayou

PoorPosted for load

West Carroll Parish, Louisiana · 4.3 MI East of LA 583 · Structure no. 056208620904361

Built
1959
66 years old
Condition
Poor
inspected February 2023
Type
Slab
Concrete
Length
180 ft
9 main spans
Daily traffic
242
2021 count
Owner
State
State Highway Agency

About this bridge

LA0586 over Tiger Bayou is a concrete slab carrying LA0586 over Tiger Bayou in West Carroll Parish, Louisiana. It was built in 1959, so it is 66 years old, older than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 242 vehicles a day, roughly 19% of them trucks, projected to reach 266 by 2041. The structure is 180 ft (54.9 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesLA0586
CrossesTiger Bayou
Location4.3 MI East of LA 583
RouteState Highway 586
CountyWest Carroll Parish
StateLouisiana
Coordinates32.91835, -91.3988
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating19.6 US tons
Inventory rating15 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans9
Design loadH 15
Structure length180 ft (54.9 m)
Longest span20 ft (6.1 m)
Deck width30 ft (9.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic242 (2021)
Projected traffic266 by 2041
Trucks19%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0586 over Tiger Bayou built?

It was built in 1959, making it 66 years old in 2025.

What condition is LA0586 over Tiger Bayou in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in February 2023.

How much traffic does LA0586 over Tiger Bayou carry?

About 242 vehicles per day (2021 count), of which roughly 19% are trucks.

How long is LA0586 over Tiger Bayou?

The structure is 180 ft (54.9 m) long with a longest span of 20 ft (6.1 m) and a deck 30 ft wide.

Who owns LA0586 over Tiger Bayou?

It is owned by the State Highway Agency.