US0171 over Harpoon Bayou Relief
FairSabine Parish, Louisiana · 0.28 Mi. South of LA 175 · Structure no. 084300250300701
- Built
- 1985
- 40 years old
- Condition
- Fair
- inspected October 2024
- Type
- Slab
- Concrete
- Length
- 199 ft
- 10 main spans
- Daily traffic
- 10,204
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
US0171 over Harpoon Bayou Relief is a concrete slab carrying US0171 over Harpoon Bayou Relief in Sabine Parish, Louisiana. It was built in 1985, so it is 40 years old, younger 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 10,204 vehicles a day, roughly 15% of them trucks, projected to reach 11,224 by 2041. The structure is 199 ft (60.7 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
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| 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 US0171 over Harpoon Bayou Relief built?
It was built in 1985, making it 40 years old in 2025.
What condition is US0171 over Harpoon Bayou Relief 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 October 2024.
How much traffic does US0171 over Harpoon Bayou Relief carry?
About 10,204 vehicles per day (2021 count), of which roughly 15% are trucks.
How long is US0171 over Harpoon Bayou Relief?
The structure is 199 ft (60.7 m) long with a longest span of 20 ft (6.1 m) and a deck 43 ft wide.
Who owns US0171 over Harpoon Bayou Relief?
It is owned by the State Highway Agency.