LA0431 over Black Bayou
PoorAscension Parish, Louisiana · 2.16 MI N JCT US 61 · Structure no. 610302670202161
- Built
- 1983
- 42 years old
- Condition
- Poor
- inspected June 2024
- Type
- Slab
- Concrete
- Length
- 76 ft
- 4 main spans
- Daily traffic
- 9,608
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
LA0431 over Black Bayou is a concrete slab carrying LA0431 over Black Bayou in Ascension Parish, Louisiana. It was built in 1983, so it is 42 years old, younger 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.
It carries about 9,608 vehicles a day, roughly 7% of them trucks, projected to reach 10,568 by 2041. The structure is 76 ft (23.2 m) long and 42 ft wide. If it were closed, the detour would be 98.8 mi (159 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 LA0431 over Black Bayou built?
It was built in 1983, making it 42 years old in 2025.
What condition is LA0431 over Black Bayou 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 June 2024.
How much traffic does LA0431 over Black Bayou carry?
About 9,608 vehicles per day (2021 count), of which roughly 7% are trucks.
How long is LA0431 over Black Bayou?
The structure is 76 ft (23.2 m) long with a longest span of 19 ft (5.8 m) and a deck 42 ft wide.
Who owns LA0431 over Black Bayou?
It is owned by the State Highway Agency.