US Bridges

LA0103 over Drainage Canal

Good

St. Landry Parish, Louisiana · 3.81 MI North of LA 104 · Structure no. 034908493103811

Built
1960
65 years old
Condition
Good
inspected February 2023
Type
Culvert
Concrete
Length
27 ft
3 main spans
Daily traffic
616
2021 count
Owner
State
State Highway Agency

About this bridge

LA0103 over Drainage Canal is a concrete culvert carrying LA0103 over Drainage Canal in St. Landry Parish, Louisiana. It was built in 1960, so it is 65 years old, older than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 616 vehicles a day, roughly 12% of them trucks, projected to reach 677 by 2041. The structure is 27 ft (8.2 m) long and 43 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

CarriesLA0103
CrossesDrainage Canal
Location3.81 MI North of LA 104
RouteState Highway 103
Coordinates30.62568, -92.1795
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadH 15
Structure length27 ft (8.2 m)
Longest span8 ft (2.4 m)
Deck width43 ft (13 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic616 (2021)
Projected traffic677 by 2041
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 LA0103 over Drainage Canal built?

It was built in 1960, making it 65 years old in 2025.

What condition is LA0103 over Drainage Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2023.

How much traffic does LA0103 over Drainage Canal carry?

About 616 vehicles per day (2021 count), of which roughly 12% are trucks.

How long is LA0103 over Drainage Canal?

The structure is 27 ft (8.2 m) long with a longest span of 8 ft (2.4 m) and a deck 43 ft wide.

Who owns LA0103 over Drainage Canal?

It is owned by the State Highway Agency.