US Bridges

LA0509 over Clear Lake

Fair

De Soto Parish, Louisiana · 2.1 MI East of I-49 · Structure no. 041601050200851

Built
1981
44 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete
Length
560 ft
28 main spans
Daily traffic
5,263
2021 count
Owner
State
State Highway Agency

About this bridge

LA0509 over Clear Lake is a concrete slab carrying LA0509 over Clear Lake in De Soto Parish, Louisiana. It was built in 1981, so it is 44 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 5,263 vehicles a day, roughly 19% of them trucks, projected to reach 5,789 by 2041. The structure is 560 ft (170.7 m) long and 33 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

Location

Open in Google Maps
CarriesLA0509
CrossesClear Lake
Location2.1 MI East of I-49
RouteState Highway 509
CountyDe Soto Parish
StateLouisiana
Coordinates32.14102, -93.5936
Functional classRural Major 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 protection8 Very GoodNo problems noted.
Last inspectionMay 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 rating75 US tons
Inventory rating45 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans28
Design loadHS 20
Structure length560 ft (170.7 m)
Longest span20 ft (6.1 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,263 (2021)
Projected traffic5,789 by 2041
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 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 LA0509 over Clear Lake built?

It was built in 1981, making it 44 years old in 2025.

What condition is LA0509 over Clear Lake 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 May 2024.

How much traffic does LA0509 over Clear Lake carry?

About 5,263 vehicles per day (2021 count), of which roughly 19% are trucks.

How long is LA0509 over Clear Lake?

The structure is 560 ft (170.7 m) long with a longest span of 20 ft (6.1 m) and a deck 33 ft wide.

Who owns LA0509 over Clear Lake?

It is owned by the State Highway Agency.