US Bridges

LA0585 over Bayou Macon

Good

East Carroll Parish, Louisiana · 2.18 MI E of US 65 · Structure no. 051803320500001

Built
2001
24 years old
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
528 ft
7 main spans
Daily traffic
372
2021 count
Owner
State
State Highway Agency

About this bridge

LA0585 over Bayou Macon is a prestressed concrete stringer/multi-beam or girder carrying LA0585 over Bayou Macon in East Carroll Parish, Louisiana. It was built in 2001, so it is 24 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 372 vehicles a day, roughly 15% of them trucks, projected to reach 409 by 2041. The structure is 528 ft (160.9 m) long and 32 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesLA0585
CrossesBayou Macon
Location2.18 MI E of US 65
RouteState Highway 585
Coordinates32.9923, -91.26272
Functional classRural Major 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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating81 US tons
Inventory rating48 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length528 ft (160.9 m)
Longest span75 ft (22.9 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic372 (2021)
Projected traffic409 by 2041
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was LA0585 over Bayou Macon built?

It was built in 2001, making it 24 years old in 2025.

What condition is LA0585 over Bayou Macon 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 February 2023.

How much traffic does LA0585 over Bayou Macon carry?

About 372 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is LA0585 over Bayou Macon?

The structure is 528 ft (160.9 m) long with a longest span of 75 ft (22.9 m) and a deck 32 ft wide.

Who owns LA0585 over Bayou Macon?

It is owned by the State Highway Agency.