I0012 over LA 21
GoodSt. Tammany Parish, Louisiana · 2.2 M E of LA 1077 · Structure no. 625204540406602
- Built
- 1975
- 50 years old
- Condition
- Good
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 258 ft
- 4 main spans
- Daily traffic
- 29,236
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
I0012 over LA 21 is a prestressed concrete stringer/multi-beam or girder carrying I0012 over LA 21 in St. Tammany 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 29,236 vehicles a day, roughly 26% of them trucks, projected to reach 32,159 by 2041. The structure is 258 ft (78.6 m) long and 43 ft wide.
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I0012 over LA 21 built?
It was built in 1975, making it 50 years old in 2025.
What condition is I0012 over LA 21 in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.
How much traffic does I0012 over LA 21 carry?
About 29,236 vehicles per day (2021 count), of which roughly 26% are trucks.
How long is I0012 over LA 21?
The structure is 258 ft (78.6 m) long with a longest span of 77 ft (23.5 m) and a deck 43 ft wide.
Who owns I0012 over LA 21?
It is owned by the State Highway Agency.