US Bridges

LA0115 over Bayou Dulac

Fair

Avoyelles Parish, Louisiana · 7.91 Miles North of LA 29 · Structure no. 080500330107911

Built
1950
75 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
340 ft
8 main spans
Daily traffic
3,936
2021 count
Owner
State
State Highway Agency

About this bridge

LA0115 over Bayou Dulac is a steel stringer/multi-beam or girder carrying LA0115 over Bayou Dulac in Avoyelles Parish, Louisiana. It was built in 1950, so it is 75 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 5 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 3,936 vehicles a day, roughly 15% of them trucks, projected to reach 4,329 by 2041. The structure is 340 ft (103.6 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesLA0115
CrossesBayou Dulac
Location7.91 Miles North of LA 29
RouteState Highway 115
CountyAvoyelles Parish
StateLouisiana
Coordinates31.02005, -92.1481
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating35.4 US tons
Inventory rating27.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans8
Design loadH 15
Structure length340 ft (103.6 m)
Longest span60 ft (18.3 m)
Deck width29 ft (8.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,936 (2021)
Projected traffic4,329 by 2041
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.4 million
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0115 over Bayou Dulac built?

It was built in 1950, making it 75 years old in 2025.

What condition is LA0115 over Bayou Dulac 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 May 2024.

How much traffic does LA0115 over Bayou Dulac carry?

About 3,936 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is LA0115 over Bayou Dulac?

The structure is 340 ft (103.6 m) long with a longest span of 60 ft (18.3 m) and a deck 29 ft wide.

Who owns LA0115 over Bayou Dulac?

It is owned by the State Highway Agency.