US Bridges

I0012 over Tangipahoa River

Fair

Tangipahoa Parish, Louisiana · I0012 · Structure no. 625304540313051

Built
1975
50 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
689 ft
10 main spans
Daily traffic
53,386
2021 count
Owner
State
State Highway Agency

About this bridge

I0012 over Tangipahoa River is a prestressed concrete stringer/multi-beam or girder carrying I0012 over Tangipahoa River in Tangipahoa Parish, Louisiana. It was built in 1975, so it is 50 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 53,386 vehicles a day, roughly 25% of them trucks, projected to reach 58,724 by 2041. The structure is 689 ft (210 m) long and 43 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesI0012
CrossesTangipahoa River
LocationI0012
RouteInterstate 12
CountyTangipahoa Parish
StateLouisiana
Coordinates30.4801, -90.3403
Functional classRural 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20
Structure length689 ft (210 m)
Longest span80 ft (24.4 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic53,386 (2021)
Projected traffic58,724 by 2041
Trucks25%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Tangipahoa River built?

It was built in 1975, making it 50 years old in 2025.

What condition is I0012 over Tangipahoa River 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 I0012 over Tangipahoa River carry?

About 53,386 vehicles per day (2021 count), of which roughly 25% are trucks.

How long is I0012 over Tangipahoa River?

The structure is 689 ft (210 m) long with a longest span of 80 ft (24.4 m) and a deck 43 ft wide.

Who owns I0012 over Tangipahoa River?

It is owned by the State Highway Agency.