US Bridges

I0012 over Drainage

Fair

Tangipahoa Parish, Louisiana · 1.4 M E of I-55 · Structure no. 625304540305681

Built
1970
55 years old
Condition
Fair
inspected February 2023
Type
Culvert
Concrete
Length
44 ft
4 main spans
Daily traffic
58,377
2021 count
Owner
State
State Highway Agency

About this bridge

I0012 over Drainage is a concrete culvert carrying I0012 over Drainage in Tangipahoa Parish, Louisiana. It was built in 1970, 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 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 58,377 vehicles a day, roughly 26% of them trucks, projected to reach 64,214 by 2041. The structure is 44 ft (13.4 m) long and 324 ft wide.

Location

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CarriesI0012
CrossesDrainage
Location1.4 M E of I-55
RouteInterstate 12
CountyTangipahoa Parish
StateLouisiana
Coordinates30.47887, -90.4639
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length44 ft (13.4 m)
Longest span10 ft (3 m)
Deck width324 ft (98.8 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic58,377 (2021)
Projected traffic64,214 by 2041
Trucks26%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$256,000
NavigationNo navigation control on waterway

Frequently asked questions

When was I0012 over Drainage built?

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

What condition is I0012 over Drainage 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 Drainage carry?

About 58,377 vehicles per day (2021 count), of which roughly 26% are trucks.

How long is I0012 over Drainage?

The structure is 44 ft (13.4 m) long with a longest span of 10 ft (3 m) and a deck 324 ft wide.

Who owns I0012 over Drainage?

It is owned by the State Highway Agency.