LA0427 over Bayou Manchac
PoorPosted for loadAscension Parish, Louisiana · 2.1 MI W of LA 42 · Structure no. 611708172300001
- Built
- 1972
- 53 years old
- Condition
- Poor
- inspected January 2024
- Type
- Slab
- Concrete
- Length
- 114 ft
- 6 main spans
- Daily traffic
- 11,384
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
LA0427 over Bayou Manchac is a concrete slab carrying LA0427 over Bayou Manchac in Ascension Parish, Louisiana. It was built in 1972, so it is 53 years old, older than the Louisiana average of 43 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.
It carries about 11,384 vehicles a day, roughly 3% of them trucks, projected to reach 12,522 by 2041. The structure is 114 ft (34.7 m) long and 35 ft wide. If it were closed, the detour would be 3.1 mi (5 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was LA0427 over Bayou Manchac built?
It was built in 1972, making it 53 years old in 2025.
What condition is LA0427 over Bayou Manchac in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in January 2024.
How much traffic does LA0427 over Bayou Manchac carry?
About 11,384 vehicles per day (2021 count), of which roughly 3% are trucks.
How long is LA0427 over Bayou Manchac?
The structure is 114 ft (34.7 m) long with a longest span of 19 ft (5.8 m) and a deck 35 ft wide.
Who owns LA0427 over Bayou Manchac?
It is owned by the State Highway Agency.