US Bridges

L. Dubois RD over Coulee

FairPosted for load

Iberia Parish, Louisiana · 1.2 Mi. E. of LA 329 · Structure no. 032329581915121

Built
1993
32 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
40 ft
4 main spans
Daily traffic
89
2021 count
Owner
County
County Highway Agency

About this bridge

L. Dubois RD over Coulee is a wood or timber stringer/multi-beam or girder carrying L. Dubois RD over Coulee in Iberia Parish, Louisiana. It was built in 1993, so it is 32 years old, younger 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. Its operating status is: posted for load restriction.

It carries about 89 vehicles a day, projected to reach 97 by 2041. The structure is 40 ft (12.2 m) long and 20 ft wide.

Location

Open in Google Maps
CarriesL. Dubois RD
CrossesCoulee
Location1.2 Mi. E. of LA 329
RouteCounty Highway 0
CountyIberia Parish
StateLouisiana
Coordinates29.96832, -91.8535
Functional classUrban Local

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 protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating17 US tons
Inventory rating12 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans4
Design loadH 15
Structure length40 ft (12.2 m)
Longest span14 ft (4.3 m)
Deck width20 ft (6.2 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic89 (2021)
Projected traffic97 by 2041
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 L. Dubois RD over Coulee built?

It was built in 1993, making it 32 years old in 2025.

What condition is L. Dubois RD over Coulee 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 October 2024.

How much traffic does L. Dubois RD over Coulee carry?

About 89 vehicles per day (2021 count).

How long is L. Dubois RD over Coulee?

The structure is 40 ft (12.2 m) long with a longest span of 14 ft (4.3 m) and a deck 20 ft wide.

Who owns L. Dubois RD over Coulee?

It is owned by the County Highway Agency.