US Bridges

US0090 over Duboin Canal

Fair

Iberia Parish, Louisiana · 0.40 MI E of LA 83 · Structure no. 032304240411331

Built
1969
56 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete
Length
44 ft
5 main spans
Daily traffic
22,993
2017 count
Owner
State
State Highway Agency

About this bridge

US0090 over Duboin Canal is a concrete culvert carrying US0090 over Duboin Canal in Iberia Parish, Louisiana. It was built in 1969, so it is 56 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 22,993 vehicles a day, roughly 10% of them trucks, projected to reach 25,292 by 2037. The structure is 44 ft (13.4 m) long and 240 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesUS0090
CrossesDuboin Canal
Location0.40 MI E of LA 83
RouteU.S. Route 90
CountyIberia Parish
StateLouisiana
Coordinates29.95773, -91.8153
Functional classUrban Other Principal 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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.8 US tons
Inventory rating60 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans5
Design loadHS 20
Structure length44 ft (13.4 m)
Longest span7 ft (2.1 m)
Deck width240 ft (73 m)
Roadway width114 ft (34.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,993 (2017)
Projected traffic25,292 by 2037
Trucks10%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

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 US0090 over Duboin Canal built?

It was built in 1969, making it 56 years old in 2025.

What condition is US0090 over Duboin Canal 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 September 2024.

How much traffic does US0090 over Duboin Canal carry?

About 22,993 vehicles per day (2017 count), of which roughly 10% are trucks.

How long is US0090 over Duboin Canal?

The structure is 44 ft (13.4 m) long with a longest span of 7 ft (2.1 m) and a deck 240 ft wide.

Who owns US0090 over Duboin Canal?

It is owned by the State Highway Agency.