US Bridges

LA0004 over Saline Bayou

Poor

Bienville Parish, Louisiana · 1.2 MI East of LA 9 · Structure no. 040700670401211

Built
1982
43 years old
Condition
Poor
inspected April 2024
Type
Slab
Concrete
Length
418 ft
22 main spans
Daily traffic
504
2021 count
Owner
State
State Highway Agency

About this bridge

LA0004 over Saline Bayou is a concrete slab carrying LA0004 over Saline Bayou in Bienville Parish, Louisiana. It was built in 1982, so it is 43 years old, younger 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 504 vehicles a day, roughly 19% of them trucks, projected to reach 554 by 2041. The structure is 418 ft (127.4 m) long and 35 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesLA0004
CrossesSaline Bayou
Location1.2 MI East of LA 9
RouteState Highway 4
Coordinates32.25026, -92.9772
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27.9 US tons
Inventory rating21.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans22
Design loadHS 20
Structure length418 ft (127.4 m)
Longest span19 ft (5.8 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic504 (2021)
Projected traffic554 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 LA0004 over Saline Bayou built?

It was built in 1982, making it 43 years old in 2025.

What condition is LA0004 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 April 2024.

How much traffic does LA0004 over Saline Bayou carry?

About 504 vehicles per day (2021 count), of which roughly 19% are trucks.

How long is LA0004 over Saline Bayou?

The structure is 418 ft (127.4 m) long with a longest span of 19 ft (5.8 m) and a deck 35 ft wide.

Who owns LA0004 over Saline Bayou?

It is owned by the State Highway Agency.