US Bridges

Courtableau RD over Little Darbonne Bayou

Good

St. Landry Parish, Louisiana · 0.50 MI Wof US 190 · Structure no. 034900000800306

Built
2011
14 years old
Condition
Good
inspected April 2023
Type
Slab
Concrete
Length
80 ft
4 main spans
Daily traffic
180
2020 count
Owner
County
County Highway Agency

About this bridge

Courtableau RD over Little Darbonne Bayou is a concrete slab carrying Courtableau RD over Little Darbonne Bayou in St. Landry Parish, Louisiana. It was built in 2011, so it is 14 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 180 vehicles a day, projected to reach 198 by 2040. The structure is 80 ft (24.4 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCourtableau RD
CrossesLittle Darbonne Bayou
Location0.50 MI Wof US 190
RouteCounty Highway 0
Coordinates30.55195, -91.87583
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 inspectionApril 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 rating56.8 US tons
Inventory rating44 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans4
Design loadHS 20
Structure length80 ft (24.4 m)
Longest span20 ft (6.1 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic180 (2020)
Projected traffic198 by 2040
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Courtableau RD over Little Darbonne Bayou built?

It was built in 2011, making it 14 years old in 2025.

What condition is Courtableau RD over Little Darbonne 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 April 2023.

How much traffic does Courtableau RD over Little Darbonne Bayou carry?

About 180 vehicles per day (2020 count).

How long is Courtableau RD over Little Darbonne Bayou?

The structure is 80 ft (24.4 m) long with a longest span of 20 ft (6.1 m) and a deck 27 ft wide.

Who owns Courtableau RD over Little Darbonne Bayou?

It is owned by the County Highway Agency.