US Bridges

LA 400 over Cancienne Canal

Fair

Assumption Parish, Louisiana · 4.2 Miles Northwest of LA · Structure no. 610400000800915

Built
2013
12 years old
Condition
Fair
inspected November 2024
Type
Slab
Concrete
Length
120 ft
6 main spans
Daily traffic
384
2020 count
Owner
County
County Highway Agency

About this bridge

LA 400 over Cancienne Canal is a concrete slab carrying LA 400 over Cancienne Canal in Assumption Parish, Louisiana. It was built in 2013, so it is 12 years old, younger 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 384 vehicles a day, projected to reach 422 by 2040. The structure is 120 ft (36.6 m) long and 27 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesLA 400
CrossesCancienne Canal
Location4.2 Miles Northwest of LA
RouteCounty Highway 0
CountyAssumption Parish
StateLouisiana
Coordinates29.86758, -91.07621
Functional classRural Local

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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating53.6 US tons
Inventory rating41.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span20 ft (6.1 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic384 (2020)
Projected traffic422 by 2040
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was LA 400 over Cancienne Canal built?

It was built in 2013, making it 12 years old in 2025.

What condition is LA 400 over Cancienne 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 November 2024.

How much traffic does LA 400 over Cancienne Canal carry?

About 384 vehicles per day (2020 count).

How long is LA 400 over Cancienne Canal?

The structure is 120 ft (36.6 m) long with a longest span of 20 ft (6.1 m) and a deck 27 ft wide.

Who owns LA 400 over Cancienne Canal?

It is owned by the County Highway Agency.