US Bridges

LA0004 over Sandy Bayou

Good

Franklin Parish, Louisiana · 1.75 M E of LA 572 · Structure no. 582100360414561

Built
1993
32 years old
Condition
Good
inspected February 2024
Type
Slab
Concrete
Length
100 ft
5 main spans
Daily traffic
1,082
2021 count
Owner
State
State Highway Agency

About this bridge

LA0004 over Sandy Bayou is a concrete slab carrying LA0004 over Sandy Bayou in Franklin Parish, Louisiana. It was built in 1993, so it is 32 years old, younger than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,082 vehicles a day, roughly 21% of them trucks, projected to reach 1,190 by 2041. The structure is 100 ft (30.5 m) long and 43 ft wide. If it were closed, the detour would be 69 mi (111 km).

CarriesLA0004
CrossesSandy Bayou
Location1.75 M E of LA 572
RouteState Highway 4
Coordinates32.09276, -91.5232
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72 US tons
Inventory rating43 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length100 ft (30.5 m)
Longest span20 ft (6.1 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,082 (2021)
Projected traffic1,190 by 2041
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed69 mi (111 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 Sandy Bayou built?

It was built in 1993, making it 32 years old in 2025.

What condition is LA0004 over Sandy Bayou in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2024.

How much traffic does LA0004 over Sandy Bayou carry?

About 1,082 vehicles per day (2021 count), of which roughly 21% are trucks.

How long is LA0004 over Sandy Bayou?

The structure is 100 ft (30.5 m) long with a longest span of 20 ft (6.1 m) and a deck 43 ft wide.

Who owns LA0004 over Sandy Bayou?

It is owned by the State Highway Agency.