US Bridges

LA0548 over Flat Creek

Fair

Jackson Parish, Louisiana · 2.58 MI East of LA 34 · Structure no. 052503230102581

Built
1949
76 years old
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete
Length
97 ft
4 main spans
Daily traffic
280
2021 count
Owner
State
State Highway Agency

About this bridge

LA0548 over Flat Creek is a concrete tee beam carrying LA0548 over Flat Creek in Jackson Parish, Louisiana. It was built in 1949, so it is 76 years old, older 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 280 vehicles a day, roughly 19% of them trucks, projected to reach 308 by 2041. The structure is 97 ft (29.6 m) long and 25 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesLA0548
CrossesFlat Creek
Location2.58 MI East of LA 34
RouteState Highway 548
Coordinates32.30893, -92.3958
Functional classRural Minor Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating63.1 US tons
Inventory rating37 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length97 ft (29.6 m)
Longest span24 ft (7.3 m)
Deck width25 ft (7.6 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic280 (2021)
Projected traffic308 by 2041
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 LA0548 over Flat Creek built?

It was built in 1949, making it 76 years old in 2025.

What condition is LA0548 over Flat Creek 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 June 2024.

How much traffic does LA0548 over Flat Creek carry?

About 280 vehicles per day (2021 count), of which roughly 19% are trucks.

How long is LA0548 over Flat Creek?

The structure is 97 ft (29.6 m) long with a longest span of 24 ft (7.3 m) and a deck 25 ft wide.

Who owns LA0548 over Flat Creek?

It is owned by the State Highway Agency.