US Bridges

LA0004 over Bayou Macon

Good

Franklin Parish, Louisiana · .01 MI North of LA 555 · Structure no. 582100360410461

Built
1993
32 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
300 ft
6 main spans
Daily traffic
1,128
2021 count
Owner
State
State Highway Agency

About this bridge

LA0004 over Bayou Macon is a prestressed concrete stringer/multi-beam or girder carrying LA0004 over Bayou Macon in Franklin Parish, Louisiana. It was built in 1993, so it is 32 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 1,128 vehicles a day, roughly 21% of them trucks, projected to reach 1,240 by 2041. The structure is 300 ft (91.4 m) long and 44 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

CarriesLA0004
CrossesBayou Macon
Location.01 MI North of LA 555
RouteState Highway 4
Coordinates32.09293, -91.593
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 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 alignment8: Equal to present desirable criteria
Operating rating75.9 US tons
Inventory rating41 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length300 ft (91.4 m)
Longest span50 ft (15.2 m)
Deck width44 ft (13.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,128 (2021)
Projected traffic1,240 by 2041
Trucks21%
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 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 LA0004 over Bayou Macon built?

It was built in 1993, making it 32 years old in 2025.

What condition is LA0004 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 May 2023.

How much traffic does LA0004 over Bayou Macon carry?

About 1,128 vehicles per day (2021 count), of which roughly 21% are trucks.

How long is LA0004 over Bayou Macon?

The structure is 300 ft (91.4 m) long with a longest span of 50 ft (15.2 m) and a deck 44 ft wide.

Who owns LA0004 over Bayou Macon?

It is owned by the State Highway Agency.