US Bridges

LA0459 over Salem Creek

Good

La Salle Parish, Louisiana · 8.3 MI North Os US 84 · Structure no. 583003660108311

Built
1979
46 years old
Condition
Good
inspected October 2023
Type
Slab
Concrete
Length
134 ft
7 main spans
Daily traffic
1,160
2021 count
Owner
State
State Highway Agency

About this bridge

LA0459 over Salem Creek is a concrete slab carrying LA0459 over Salem Creek in La Salle Parish, Louisiana. It was built in 1979, so it is 46 years old, older 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 1,160 vehicles a day, roughly 21% of them trucks, projected to reach 1,276 by 2041. The structure is 134 ft (40.8 m) long and 32 ft wide. If it were closed, the detour would be 23 mi (37 km).

CarriesLA0459
CrossesSalem Creek
Location8.3 MI North Os US 84
RouteState Highway 459
Coordinates31.75704, -92.0213
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 protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72 US tons
Inventory rating43 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans7
Design loadHS 20
Structure length134 ft (40.8 m)
Longest span19 ft (5.8 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,160 (2021)
Projected traffic1,276 by 2041
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed23 mi (37 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 LA0459 over Salem Creek built?

It was built in 1979, making it 46 years old in 2025.

What condition is LA0459 over Salem Creek 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 October 2023.

How much traffic does LA0459 over Salem Creek carry?

About 1,160 vehicles per day (2021 count), of which roughly 21% are trucks.

How long is LA0459 over Salem Creek?

The structure is 134 ft (40.8 m) long with a longest span of 19 ft (5.8 m) and a deck 32 ft wide.

Who owns LA0459 over Salem Creek?

It is owned by the State Highway Agency.