US Bridges

LA1120 over Andre Coulee

Fair

Acadia Parish, Louisiana · 2.9 Mi. N of LA 100 · Structure no. 030108011002871

Built
1974
51 years old
Condition
Fair
inspected February 2023
Type
Slab
Concrete
Length
57 ft
3 main spans
Daily traffic
801
2021 count
Owner
State
State Highway Agency

About this bridge

LA1120 over Andre Coulee is a concrete slab carrying LA1120 over Andre Coulee 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 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.

It carries about 801 vehicles a day, roughly 12% of them trucks, projected to reach 881 by 2041. The structure is 57 ft (17.4 m) long and 31 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesLA1120
CrossesAndre Coulee
Location2.9 Mi. N of LA 100
RouteState Highway 1120
CountyAcadia Parish
StateLouisiana
Coordinates30.27504, -92.4679
Functional classRural Minor Collector

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 protection7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating26.5 US tons
Inventory rating20.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length57 ft (17.4 m)
Longest span19 ft (5.8 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.6 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 Andre Coulee built?

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

What condition is LA1120 over Andre 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 February 2023.

How much traffic does LA1120 over Andre Coulee carry?

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

How long is LA1120 over Andre Coulee?

The structure is 57 ft (17.4 m) long with a longest span of 19 ft (5.8 m) and a deck 31 ft wide.

Who owns LA1120 over Andre Coulee?

It is owned by the State Highway Agency.