US Bridges

LA0447 over I-12

Fair

Livingston Parish, Louisiana · LA0447 · Structure no. 623202680108361

Built
1970
55 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
242 ft
4 main spans
Daily traffic
34,245
2021 count
Owner
State
State Highway Agency

About this bridge

LA0447 over I-12 is a prestressed concrete stringer/multi-beam or girder carrying LA0447 over I-12 in Livingston 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 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 34,245 vehicles a day, roughly 6% of them trucks, projected to reach 37,669 by 2041. The structure is 242 ft (73.8 m) long and 33 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesLA0447
CrossesI-12
LocationLA0447
RouteState Highway 447
Coordinates30.46974, -90.8629
Functional classUrban Other Principal Arterial

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.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86 US tons
Inventory rating40 US tons

Structure

MaterialPrestressed Concrete
DeckWood or timber
Main spans4
Design loadHS 20
Structure length242 ft (73.8 m)
Longest span70 ft (21.3 m)
Deck width33 ft (10.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34,245 (2021)
Projected traffic37,669 by 2041
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was LA0447 over I-12 built?

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

What condition is LA0447 over I-12 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 March 2024.

How much traffic does LA0447 over I-12 carry?

About 34,245 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is LA0447 over I-12?

The structure is 242 ft (73.8 m) long with a longest span of 70 ft (21.3 m) and a deck 33 ft wide.

Who owns LA0447 over I-12?

It is owned by the State Highway Agency.