US Bridges

LA0585 over Tiger Bayou

Fair

West Carroll Parish, Louisiana · 6.3 MI North of LA 879 · Structure no. 056203320206321

Built
1978
47 years old
Condition
Fair
inspected January 2023
Type
Slab
Concrete
Length
140 ft
7 main spans
Daily traffic
584
2021 count
Owner
State
State Highway Agency

About this bridge

LA0585 over Tiger Bayou is a concrete slab carrying LA0585 over Tiger Bayou in West Carroll Parish, Louisiana. It was built in 1978, so it is 47 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 584 vehicles a day, roughly 15% of them trucks, projected to reach 642 by 2041. The structure is 140 ft (42.7 m) long and 33 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesLA0585
CrossesTiger Bayou
Location6.3 MI North of LA 879
RouteState Highway 585
CountyWest Carroll Parish
StateLouisiana
Coordinates32.95233, -91.449
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 protection6 SatisfactoryStructural elements show some minor deterioration.
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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating74 US tons
Inventory rating44 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length140 ft (42.7 m)
Longest span20 ft (6.1 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic584 (2021)
Projected traffic642 by 2041
Trucks15%
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 LA0585 over Tiger Bayou built?

It was built in 1978, making it 47 years old in 2025.

What condition is LA0585 over Tiger 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 LA0585 over Tiger Bayou carry?

About 584 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is LA0585 over Tiger Bayou?

The structure is 140 ft (42.7 m) long with a longest span of 20 ft (6.1 m) and a deck 33 ft wide.

Who owns LA0585 over Tiger Bayou?

It is owned by the State Highway Agency.