US Bridges

LA0458 over Six Mile Creek

Good

Vernon Parish, Louisiana · 4.06 Mi. East of LA 399 · Structure no. 085801383001401

Built
1994
31 years old
Condition
Good
inspected July 2024
Type
Slab
Concrete
Length
360 ft
18 main spans
Daily traffic
250
2021 count
Owner
State
State Highway Agency

About this bridge

LA0458 over Six Mile Creek is a concrete slab carrying LA0458 over Six Mile Creek in Vernon Parish, Louisiana. It was built in 1994, so it is 31 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 250 vehicles a day, roughly 10% of them trucks, projected to reach 275 by 2041. The structure is 360 ft (109.7 m) long and 33 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesLA0458
CrossesSix Mile Creek
Location4.06 Mi. East of LA 399
RouteState Highway 458
Coordinates30.9463, -92.9492
Functional classRural Local

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating40 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans18
Design loadHS 20
Structure length360 ft (109.7 m)
Longest span20 ft (6.1 m)
Deck width33 ft (10 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2021)
Projected traffic275 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 LA0458 over Six Mile Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is LA0458 over Six Mile 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 July 2024.

How much traffic does LA0458 over Six Mile Creek carry?

About 250 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is LA0458 over Six Mile Creek?

The structure is 360 ft (109.7 m) long with a longest span of 20 ft (6.1 m) and a deck 33 ft wide.

Who owns LA0458 over Six Mile Creek?

It is owned by the State Highway Agency.