US Bridges

LA0555 over Bayou Macon

Good

Franklin Parish, Louisiana · 0.05 M N of LA 610 · Structure no. 582108210603901

Built
2003
22 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
394 ft
8 main spans
Daily traffic
562
2021 count
Owner
State
State Highway Agency

About this bridge

LA0555 over Bayou Macon is a prestressed concrete stringer/multi-beam or girder carrying LA0555 over Bayou Macon in Franklin Parish, Louisiana. It was built in 2003, so it is 22 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 562 vehicles a day, roughly 15% of them trucks, projected to reach 618 by 2041. The structure is 394 ft (120.1 m) long and 40 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

CarriesLA0555
CrossesBayou Macon
Location0.05 M N of LA 610
RouteState Highway 555
Coordinates32.19033, -91.5708
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 protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating63.2 US tons
Inventory rating40.3 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20
Structure length394 ft (120.1 m)
Longest span49 ft (14.9 m)
Deck width40 ft (12.2 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic562 (2021)
Projected traffic618 by 2041
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 LA0555 over Bayou Macon built?

It was built in 2003, making it 22 years old in 2025.

What condition is LA0555 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 June 2023.

How much traffic does LA0555 over Bayou Macon carry?

About 562 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is LA0555 over Bayou Macon?

The structure is 394 ft (120.1 m) long with a longest span of 49 ft (14.9 m) and a deck 40 ft wide.

Who owns LA0555 over Bayou Macon?

It is owned by the State Highway Agency.