US Bridges

LA0154 over Black Lake Bayou

Fair

Bienville Parish, Louisiana · 3.15 MI East of LA 792 · Structure no. 040700900406861

Built
1979
46 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete Continuous
Length
300 ft
15 main spans
Daily traffic
856
2021 count
Owner
State
State Highway Agency

About this bridge

LA0154 over Black Lake Bayou is a concrete continuous slab carrying LA0154 over Black Lake Bayou in Bienville Parish, Louisiana. It was built in 1979, so it is 46 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 856 vehicles a day, roughly 19% of them trucks, projected to reach 941 by 2041. The structure is 300 ft (91.4 m) long and 33 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

CarriesLA0154
CrossesBlack Lake Bayou
Location3.15 MI East of LA 792
RouteState Highway 154
Coordinates32.36463, -93.1688
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating67 US tons
Inventory rating40 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans15
Design loadHS 20
Structure length300 ft (91.4 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 traffic856 (2021)
Projected traffic941 by 2041
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 LA0154 over Black Lake Bayou built?

It was built in 1979, making it 46 years old in 2025.

What condition is LA0154 over Black Lake Bayou 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 2023.

How much traffic does LA0154 over Black Lake Bayou carry?

About 856 vehicles per day (2021 count), of which roughly 19% are trucks.

How long is LA0154 over Black Lake Bayou?

The structure is 300 ft (91.4 m) long with a longest span of 20 ft (6.1 m) and a deck 33 ft wide.

Who owns LA0154 over Black Lake Bayou?

It is owned by the State Highway Agency.