US Bridges

LA0015 over Ash Slough Relief

Good

Franklin Parish, Louisiana · 0.25 M N of LA 868 · Structure no. 582100260702841

Built
1987
38 years old
Condition
Good
inspected September 2024
Type
Slab
Concrete
Length
80 ft
4 main spans
Daily traffic
9,661
2021 count
Owner
State
State Highway Agency

About this bridge

LA0015 over Ash Slough Relief is a concrete slab carrying LA0015 over Ash Slough Relief in Franklin Parish, Louisiana. It was built in 1987, so it is 38 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 9,661 vehicles a day, roughly 20% of them trucks, projected to reach 10,627 by 2041. The structure is 80 ft (24.4 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesLA0015
CrossesAsh Slough Relief
Location0.25 M N of LA 868
RouteState Highway 15
Coordinates32.20831, -91.7309
Functional classRural Principal Arterial - Other

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
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 rating74 US tons
Inventory rating44 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length80 ft (24.4 m)
Longest span20 ft (6.1 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,661 (2021)
Projected traffic10,627 by 2041
Trucks20%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 LA0015 over Ash Slough Relief built?

It was built in 1987, making it 38 years old in 2025.

What condition is LA0015 over Ash Slough Relief 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 September 2024.

How much traffic does LA0015 over Ash Slough Relief carry?

About 9,661 vehicles per day (2021 count), of which roughly 20% are trucks.

How long is LA0015 over Ash Slough Relief?

The structure is 80 ft (24.4 m) long with a longest span of 20 ft (6.1 m) and a deck 43 ft wide.

Who owns LA0015 over Ash Slough Relief?

It is owned by the State Highway Agency.