US Bridges

LA0402 over Bayou St;vincent.

Fair

Assumption Parish, Louisiana · 2.8 M SE of LA 1&LA 70 · Structure no. 610408041100021

Built
1980
45 years old
Condition
Fair
inspected July 2024
Type
Slab
Concrete
Length
57 ft
3 main spans
Daily traffic
174
2021 count
Owner
State
State Highway Agency

About this bridge

LA0402 over Bayou St;vincent. is a concrete slab carrying LA0402 over Bayou St;vincent. in Assumption Parish, Louisiana. It was built in 1980, so it is 45 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 174 vehicles a day, roughly 10% of them trucks, projected to reach 191 by 2041. The structure is 57 ft (17.4 m) long and 31 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesLA0402
CrossesBayou St;vincent.
Location2.8 M SE of LA 1&LA 70
RouteState Highway 402
CountyAssumption Parish
StateLouisiana
Coordinates29.96181, -91.06771
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69 US tons
Inventory rating41 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 (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic174 (2021)
Projected traffic191 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 LA0402 over Bayou St;vincent. built?

It was built in 1980, making it 45 years old in 2025.

What condition is LA0402 over Bayou St;vincent. 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 July 2024.

How much traffic does LA0402 over Bayou St;vincent. carry?

About 174 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is LA0402 over Bayou St;vincent.?

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 LA0402 over Bayou St;vincent.?

It is owned by the State Highway Agency.