US Bridges

LA0909 over Six Mile Bayou

Good

Concordia Parish, Louisiana · 3.1 MI South of LA 126 · Structure no. 581501780105751

Built
2003
22 years old
Condition
Good
inspected March 2024
Type
Slab
Concrete
Length
57 ft
3 main spans
Daily traffic
68
2021 count
Owner
State
State Highway Agency

About this bridge

LA0909 over Six Mile Bayou is a concrete slab carrying LA0909 over Six Mile Bayou in Concordia Parish, Louisiana. It was built in 2003, so it is 22 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 68 vehicles a day, roughly 11% of them trucks, projected to reach 74 by 2041. The structure is 57 ft (17.4 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesLA0909
CrossesSix Mile Bayou
Location3.1 MI South of LA 126
RouteState Highway 909
Coordinates31.3336, -91.8517
Functional classRural Local

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 protection8 Very GoodNo problems noted.
Last inspectionMarch 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 adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating43.5 US tons
Inventory rating33.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length57 ft (17.4 m)
Longest span19 ft (5.8 m)
Deck width35 ft (10.6 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic68 (2021)
Projected traffic74 by 2041
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0909 over Six Mile Bayou built?

It was built in 2003, making it 22 years old in 2025.

What condition is LA0909 over Six Mile 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 March 2024.

How much traffic does LA0909 over Six Mile Bayou carry?

About 68 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is LA0909 over Six Mile Bayou?

The structure is 57 ft (17.4 m) long with a longest span of 19 ft (5.8 m) and a deck 35 ft wide.

Who owns LA0909 over Six Mile Bayou?

It is owned by the State Highway Agency.