US Bridges

Airline DR over Flat River

Fair

Bossier Parish, Louisiana · 5.0 MI North of LA 3105 · Structure no. 040832388934281

Built
1985
40 years old, rebuilt 2012
Condition
Fair
inspected December 2024
Type
Slab
Concrete
Length
76 ft
4 main spans
Daily traffic
10,000
2020 count
Owner
County
County Highway Agency

About this bridge

Airline DR over Flat River is a concrete slab carrying Airline DR over Flat River in Bossier Parish, Louisiana. It was built in 1985 and reconstructed in 2012, so it is 40 years old, younger than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 10,000 vehicles a day, projected to reach 11,000 by 2040. The structure is 76 ft (23.2 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesAirline DR
CrossesFlat River
Location5.0 MI North of LA 3105
RouteCounty Highway 0
Coordinates32.64703, -93.71297
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.8 US tons
Inventory rating51.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length76 ft (23.2 m)
Longest span19 ft (5.8 m)
Deck width45 ft (13.7 m)
Roadway width42 ft (12.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,000 (2020)
Projected traffic11,000 by 2040
Trucks—
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Airline DR over Flat River built?

It was built in 1985, making it 40 years old in 2025. It was reconstructed in 2012.

What condition is Airline DR over Flat River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in December 2024.

How much traffic does Airline DR over Flat River carry?

About 10,000 vehicles per day (2020 count).

How long is Airline DR over Flat River?

The structure is 76 ft (23.2 m) long with a longest span of 19 ft (5.8 m) and a deck 45 ft wide.

Who owns Airline DR over Flat River?

It is owned by the County Highway Agency.