US Bridges

LA0154 over Four Mile Bayou

Fair

Bienville Parish, Louisiana · 1.74 MI East of LA 4 · Structure no. 040700900401741

Built
1948
77 years old
Condition
Fair
inspected April 2024
Type
Tee Beam
Concrete
Length
122 ft
5 main spans
Daily traffic
856
2021 count
Owner
State
State Highway Agency

About this bridge

LA0154 over Four Mile Bayou is a concrete tee beam carrying LA0154 over Four Mile Bayou in Bienville Parish, Louisiana. It was built in 1948, so it is 77 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 5 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 122 ft (37.2 m) long and 29 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesLA0154
CrossesFour Mile Bayou
Location1.74 MI East of LA 4
RouteState Highway 154
CountyBienville Parish
StateLouisiana
Coordinates32.34, -93.2434
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating53 US tons
Inventory rating32 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadH 15
Structure length122 ft (37.2 m)
Longest span24 ft (7.3 m)
Deck width29 ft (8.8 m)
Roadway width24 ft (7.3 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 closed8.7 mi (14 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 Four Mile Bayou built?

It was built in 1948, making it 77 years old in 2025.

What condition is LA0154 over Four Mile 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 April 2024.

How much traffic does LA0154 over Four Mile Bayou carry?

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

How long is LA0154 over Four Mile Bayou?

The structure is 122 ft (37.2 m) long with a longest span of 24 ft (7.3 m) and a deck 29 ft wide.

Who owns LA0154 over Four Mile Bayou?

It is owned by the State Highway Agency.