US Bridges

LA0399 over Little 6 Mile Cr.Relf.

PoorPosted for load

Vernon Parish, Louisiana · .56 MI North of LA 10 · Structure no. 085801380300561

Built
1965
60 years old
Condition
Poor
inspected March 2024
Type
Slab
Concrete
Length
76 ft
4 main spans
Daily traffic
396
2021 count
Owner
State
State Highway Agency

About this bridge

LA0399 over Little 6 Mile Cr.Relf. is a concrete slab carrying LA0399 over Little 6 Mile Cr.Relf. in Vernon Parish, Louisiana. It was built in 1965, so it is 60 years old, older than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 396 vehicles a day, roughly 10% of them trucks, projected to reach 435 by 2041. The structure is 76 ft (23.2 m) long and 32 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesLA0399
CrossesLittle 6 Mile Cr.Relf.
Location.56 MI North of LA 10
RouteState Highway 399
Coordinates30.96985, -93.0125
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating19.6 US tons
Inventory rating15.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans4
Design loadHS 20
Structure length76 ft (23.2 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 traffic396 (2021)
Projected traffic435 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed11.8 mi (19 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$393,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0399 over Little 6 Mile Cr.Relf. built?

It was built in 1965, making it 60 years old in 2025.

What condition is LA0399 over Little 6 Mile Cr.Relf. in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2024.

How much traffic does LA0399 over Little 6 Mile Cr.Relf. carry?

About 396 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is LA0399 over Little 6 Mile Cr.Relf.?

The structure is 76 ft (23.2 m) long with a longest span of 19 ft (5.8 m) and a deck 32 ft wide.

Who owns LA0399 over Little 6 Mile Cr.Relf.?

It is owned by the State Highway Agency.