US Bridges

LA 126 over Black Bayou

Good

Caldwell Parish, Louisiana · 2.3 MI South of LA 849 · Structure no. 581100000582100

Built
2021
4 years old
Condition
Good
inspected May 2023
Type
Slab
Concrete
Length
100 ft
5 main spans
Daily traffic
1,092
2017 count
Owner
State
State Highway Agency

About this bridge

LA 126 over Black Bayou is a concrete slab carrying LA 126 over Black Bayou in Caldwell Parish, Louisiana. It was built in 2021, so it is 4 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,092 vehicles a day, projected to reach 1,201 by 2037. The structure is 100 ft (30.5 m) long and 35 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesLA 126
CrossesBlack Bayou
Location2.3 MI South of LA 849
RouteState Highway 126
Coordinates31.97038, -92.05874
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating80.4 US tons
Inventory rating62.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans5
Design loadGreater than HL 93
Structure length100 ft (30.5 m)
Longest span20 ft (6.1 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,092 (2017)
Projected traffic1,201 by 2037
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 LA 126 over Black Bayou built?

It was built in 2021, making it 4 years old in 2025.

What condition is LA 126 over Black 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 May 2023.

How much traffic does LA 126 over Black Bayou carry?

About 1,092 vehicles per day (2017 count).

How long is LA 126 over Black Bayou?

The structure is 100 ft (30.5 m) long with a longest span of 20 ft (6.1 m) and a deck 35 ft wide.

Who owns LA 126 over Black Bayou?

It is owned by the State Highway Agency.