US421 over Mingo Swamp
GoodHarnett County, North Carolina · 0.7MI.S. of JCT.SR1794 · Structure no. 000000000850064
- Built
- 1993
- 32 years old
- Condition
- Good
- inspected July 2024
- Type
- Slab
- Prestressed Concrete
- Length
- 122 ft
- 3 main spans
- Daily traffic
- 8,400
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
US421 over Mingo Swamp is a prestressed concrete slab carrying US421 over Mingo Swamp in Harnett County, North Carolina. It was built in 1993, so it is 32 years old, younger than the North Carolina average of 38.7 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 8,400 vehicles a day, roughly 8% of them trucks, projected to reach 16,800 by 2040. The structure is 122 ft (37.1 m) long and 48 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US421 over Mingo Swamp built?
It was built in 1993, making it 32 years old in 2025.
What condition is US421 over Mingo Swamp 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 July 2024.
How much traffic does US421 over Mingo Swamp carry?
About 8,400 vehicles per day (2021 count), of which roughly 8% are trucks.
How long is US421 over Mingo Swamp?
The structure is 122 ft (37.1 m) long with a longest span of 39 ft (11.8 m) and a deck 48 ft wide.
Who owns US421 over Mingo Swamp?
It is owned by the State Highway Agency.