NC171 over Copper Swamp
FairMartin County, North Carolina · 0.8 MI S JCT US64 · Structure no. 000000001170038
- Built
- 1980
- 45 years old
- Condition
- Fair
- inspected April 2024
- Type
- Slab
- Prestressed Concrete
- Length
- 45 ft
- 1 main span
- Daily traffic
- 3,400
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
NC171 over Copper Swamp is a prestressed concrete slab carrying NC171 over Copper Swamp in Martin County, North Carolina. It was built in 1980, so it is 45 years old, older than the North Carolina average of 38.7 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 3,400 vehicles a day, roughly 7% of them trucks, projected to reach 6,800 by 2040. The structure is 45 ft (13.7 m) long and 44 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was NC171 over Copper Swamp built?
It was built in 1980, making it 45 years old in 2025.
What condition is NC171 over Copper Swamp 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 April 2024.
How much traffic does NC171 over Copper Swamp carry?
About 3,400 vehicles per day (2022 count), of which roughly 7% are trucks.
How long is NC171 over Copper Swamp?
The structure is 45 ft (13.7 m) long with a longest span of 44 ft (13.4 m) and a deck 44 ft wide.
Who owns NC171 over Copper Swamp?
It is owned by the State Highway Agency.