US Bridges

LA0478 over Bayou Julien

Good

Natchitoches Parish, Louisiana · 7.54 Miles East of LA 120 · Structure no. 083500000080630

Built
2013
12 years old
Condition
Good
inspected March 2024
Type
Slab
Concrete
Length
80 ft
4 main spans
Daily traffic
172
2021 count
Owner
State
State Highway Agency

About this bridge

LA0478 over Bayou Julien is a concrete slab carrying LA0478 over Bayou Julien in Natchitoches Parish, Louisiana. It was built in 2013, so it is 12 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 172 vehicles a day, roughly 14% of them trucks, projected to reach 189 by 2041. The structure is 80 ft (24.4 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesLA0478
CrossesBayou Julien
Location7.54 Miles East of LA 120
RouteState Highway 478
Coordinates31.70564, -93.0638
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 inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating53.9 US tons
Inventory rating41.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length80 ft (24.4 m)
Longest span20 ft (6.1 m)
Deck width32 ft (9.9 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic172 (2021)
Projected traffic189 by 2041
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0478 over Bayou Julien built?

It was built in 2013, making it 12 years old in 2025.

What condition is LA0478 over Bayou Julien 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 March 2024.

How much traffic does LA0478 over Bayou Julien carry?

About 172 vehicles per day (2021 count), of which roughly 14% are trucks.

How long is LA0478 over Bayou Julien?

The structure is 80 ft (24.4 m) long with a longest span of 20 ft (6.1 m) and a deck 32 ft wide.

Who owns LA0478 over Bayou Julien?

It is owned by the State Highway Agency.