US Bridges

LA0009 over Bayou Darbonne

Fair

Claiborne Parish, Louisiana · 1.35 MI East of US 79 · Structure no. 041400700101351

Built
1978
47 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete
Length
240 ft
12 main spans
Daily traffic
2,567
2021 count
Owner
State
State Highway Agency

About this bridge

LA0009 over Bayou Darbonne is a concrete slab carrying LA0009 over Bayou Darbonne in Claiborne Parish, Louisiana. It was built in 1978, so it is 47 years old, older than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 2,567 vehicles a day, roughly 26% of them trucks, projected to reach 2,823 by 2041. The structure is 240 ft (73.2 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesLA0009
CrossesBayou Darbonne
Location1.35 MI East of US 79
RouteState Highway 9
CountyClaiborne Parish
StateLouisiana
Coordinates32.79746, -93.0343
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74 US tons
Inventory rating44 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans12
Design loadHS 20
Structure length240 ft (73.2 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 traffic2,567 (2021)
Projected traffic2,823 by 2041
Trucks26%
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 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 LA0009 over Bayou Darbonne built?

It was built in 1978, making it 47 years old in 2025.

What condition is LA0009 over Bayou Darbonne in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2024.

How much traffic does LA0009 over Bayou Darbonne carry?

About 2,567 vehicles per day (2021 count), of which roughly 26% are trucks.

How long is LA0009 over Bayou Darbonne?

The structure is 240 ft (73.2 m) long with a longest span of 20 ft (6.1 m) and a deck 43 ft wide.

Who owns LA0009 over Bayou Darbonne?

It is owned by the State Highway Agency.