US0171 over Castor Bayou
GoodVernon Parish, Louisiana · 5.4 MI North of LA 10 · Structure no. 085800240615802
- Built
- 1975
- 50 years old
- Condition
- Good
- inspected February 2024
- Type
- Slab
- Concrete
- Length
- 242 ft
- 12 main spans
- Daily traffic
- 11,450
- 2016 count
- Owner
- State
- State Highway Agency
About this bridge
US0171 over Castor Bayou is a concrete slab carrying US0171 over Castor Bayou in Vernon 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 11,450 vehicles a day, roughly 15% of them trucks, projected to reach 12,595 by 2036. The structure is 242 ft (73.8 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
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. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US0171 over Castor Bayou built?
It was built in 1975, making it 50 years old in 2025.
What condition is US0171 over Castor Bayou 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 February 2024.
How much traffic does US0171 over Castor Bayou carry?
About 11,450 vehicles per day (2016 count), of which roughly 15% are trucks.
How long is US0171 over Castor Bayou?
The structure is 242 ft (73.8 m) long with a longest span of 20 ft (6.1 m) and a deck 43 ft wide.
Who owns US0171 over Castor Bayou?
It is owned by the State Highway Agency.