US Bridges

LA1120 over Canal

Good

Acadia Parish, Louisiana · 1.81 MI North of LA 91 · Structure no. 030108011001811

Built
1974
51 years old
Condition
Good
inspected December 2023
Type
Culvert
Concrete
Length
36 ft
3 main spans
Daily traffic
801
2021 count
Owner
State
State Highway Agency

About this bridge

LA1120 over Canal is a concrete culvert carrying LA1120 over Canal in Acadia Parish, Louisiana. It was built in 1974, so it is 51 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 801 vehicles a day, roughly 12% of them trucks, projected to reach 881 by 2041. The structure is 36 ft (11 m) long and 41 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesLA1120
CrossesCanal
Location1.81 MI North of LA 91
RouteState Highway 1120
Coordinates30.26273, -92.4643
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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum 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 loadHS 20
Structure length36 ft (11 m)
Longest span8 ft (2.4 m)
Deck width41 ft (12.5 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic801 (2021)
Projected traffic881 by 2041
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 LA1120 over Canal built?

It was built in 1974, making it 51 years old in 2025.

What condition is LA1120 over 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 December 2023.

How much traffic does LA1120 over Canal carry?

About 801 vehicles per day (2021 count), of which roughly 12% are trucks.

How long is LA1120 over Canal?

The structure is 36 ft (11 m) long with a longest span of 8 ft (2.4 m) and a deck 41 ft wide.

Who owns LA1120 over Canal?

It is owned by the State Highway Agency.