US Bridges

LA0586 over Coleman Bayou

Fair

West Carroll Parish, Louisiana · 6.1 MI East of LA 583 · Structure no. 056208620906121

Built
1975
50 years old
Condition
Fair
inspected February 2023
Type
Slab
Concrete
Length
57 ft
3 main spans
Daily traffic
580
2021 count
Owner
State
State Highway Agency

About this bridge

LA0586 over Coleman Bayou is a concrete slab carrying LA0586 over Coleman Bayou in West Carroll Parish, Louisiana. It was built in 1975, so it is 50 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 5 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 580 vehicles a day, roughly 19% of them trucks, projected to reach 638 by 2041. The structure is 57 ft (17.4 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesLA0586
CrossesColeman Bayou
Location6.1 MI East of LA 583
RouteState Highway 586
CountyWest Carroll Parish
StateLouisiana
Coordinates32.91884, -91.3705
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating72 US tons
Inventory rating43 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length57 ft (17.4 m)
Longest span19 ft (5.8 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic580 (2021)
Projected traffic638 by 2041
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Coleman Bayou built?

It was built in 1975, making it 50 years old in 2025.

What condition is LA0586 over Coleman 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 February 2023.

How much traffic does LA0586 over Coleman Bayou carry?

About 580 vehicles per day (2021 count), of which roughly 19% are trucks.

How long is LA0586 over Coleman Bayou?

The structure is 57 ft (17.4 m) long with a longest span of 19 ft (5.8 m) and a deck 31 ft wide.

Who owns LA0586 over Coleman Bayou?

It is owned by the State Highway Agency.