US Bridges

LA0147 over Saline Bayou

Poor

Bienville Parish, Louisiana · 2.0 MI West of LA 9 · Structure no. 040700430401571

Built
1979
46 years old
Condition
Poor
inspected May 2023
Type
Slab
Concrete
Length
76 ft
4 main spans
Daily traffic
1,988
2021 count
Owner
State
State Highway Agency

About this bridge

LA0147 over Saline Bayou is a concrete slab carrying LA0147 over Saline 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,988 vehicles a day, roughly 19% of them trucks, projected to reach 2,186 by 2041. The structure is 76 ft (23.2 m) long and 35 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesLA0147
CrossesSaline Bayou
Location2.0 MI West of LA 9
RouteState Highway 147
CountyBienville Parish
StateLouisiana
Coordinates32.52628, -92.8973
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
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 evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating68 US tons
Inventory rating41 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans4
Design loadHS 20
Structure length76 ft (23.2 m)
Longest span19 ft (5.8 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,988 (2021)
Projected traffic2,186 by 2041
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 LA0147 over Saline Bayou built?

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

What condition is LA0147 over Saline Bayou in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2023.

How much traffic does LA0147 over Saline Bayou carry?

About 1,988 vehicles per day (2021 count), of which roughly 19% are trucks.

How long is LA0147 over Saline Bayou?

The structure is 76 ft (23.2 m) long with a longest span of 19 ft (5.8 m) and a deck 35 ft wide.

Who owns LA0147 over Saline Bayou?

It is owned by the State Highway Agency.