US Bridges

I0012 over Vincent Bayou

Fair

St. Tammany Parish, Louisiana · I0012 · Structure no. 625204540430332

Built
1970
55 years old, rebuilt 2013
Condition
Fair
inspected August 2023
Type
Slab
Concrete
Length
100 ft
5 main spans
Daily traffic
29,236
2021 count
Owner
State
State Highway Agency

About this bridge

I0012 over Vincent Bayou is a concrete slab carrying I0012 over Vincent Bayou in St. Tammany Parish, Louisiana. It was built in 1970 and reconstructed in 2013, so it is 55 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 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 29,236 vehicles a day, roughly 26% of them trucks, projected to reach 32,159 by 2041. The structure is 100 ft (30.5 m) long and 64 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI0012
CrossesVincent Bayou
LocationI0012
RouteInterstate 12
CountySt. Tammany Parish
StateLouisiana
Coordinates30.31038, -89.7798
Functional classUrban Principal Arterial - Interstate

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.9 US tons
Inventory rating46 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length100 ft (30.5 m)
Longest span20 ft (6.1 m)
Deck width64 ft (19.4 m)
Roadway width61 ft (18.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,236 (2021)
Projected traffic32,159 by 2041
Trucks26%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I0012 over Vincent Bayou built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 2013.

What condition is I0012 over Vincent Bayou 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 August 2023.

How much traffic does I0012 over Vincent Bayou carry?

About 29,236 vehicles per day (2021 count), of which roughly 26% are trucks.

How long is I0012 over Vincent Bayou?

The structure is 100 ft (30.5 m) long with a longest span of 20 ft (6.1 m) and a deck 64 ft wide.

Who owns I0012 over Vincent Bayou?

It is owned by the State Highway Agency.