US Bridges

Sidney Leblanc RD over Duboin Canal

PoorPosted for load

Iberia Parish, Louisiana · 0.5 Mi. E. of LA 83 · Structure no. 032329571914891

Built
1968
57 years old
Condition
Poor
inspected October 2024
Type
Slab
Concrete
Length
38 ft
2 main spans
Daily traffic
62
2020 count
Owner
County
County Highway Agency

About this bridge

Sidney Leblanc RD over Duboin Canal is a concrete slab carrying Sidney Leblanc RD over Duboin Canal in Iberia Parish, Louisiana. It was built in 1968, so it is 57 years old, older than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 62 vehicles a day, projected to reach 68 by 2040. The structure is 38 ft (11.6 m) long and 26 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSidney Leblanc RD
CrossesDuboin Canal
Location0.5 Mi. E. of LA 83
RouteCounty Highway 0
CountyIberia Parish
StateLouisiana
Coordinates29.95254, -91.81463
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating20.4 US tons
Inventory rating15.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length38 ft (11.6 m)
Longest span19 ft (5.8 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic62 (2020)
Projected traffic68 by 2040
Trucks—
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

OwnerCounty Highway Agency
Maintained byCounty 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 Sidney Leblanc RD over Duboin Canal built?

It was built in 1968, making it 57 years old in 2025.

What condition is Sidney Leblanc RD over Duboin Canal in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2024.

How much traffic does Sidney Leblanc RD over Duboin Canal carry?

About 62 vehicles per day (2020 count).

How long is Sidney Leblanc RD over Duboin Canal?

The structure is 38 ft (11.6 m) long with a longest span of 19 ft (5.8 m) and a deck 26 ft wide.

Who owns Sidney Leblanc RD over Duboin Canal?

It is owned by the County Highway Agency.