US421N over Big Alamance Creek
FairGuilford County, North Carolina · 0.5 MI S JCT SR3389 · Structure no. 000000000810278
- Built
- 1969
- 56 years old
- Condition
- Fair
- inspected April 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 156 ft
- 3 main spans
- Daily traffic
- 14,000
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
US421N over Big Alamance Creek is a steel stringer/multi-beam or girder carrying US421N over Big Alamance Creek in Guilford County, North Carolina. It was built in 1969, so it is 56 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 14,000 vehicles a day, roughly 12% of them trucks, projected to reach 28,000 by 2040. The structure is 156 ft (47.5 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 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 US421N over Big Alamance Creek built?
It was built in 1969, making it 56 years old in 2025.
What condition is US421N over Big Alamance Creek 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 US421N over Big Alamance Creek carry?
About 14,000 vehicles per day (2021 count), of which roughly 12% are trucks.
How long is US421N over Big Alamance Creek?
The structure is 156 ft (47.5 m) long with a longest span of 68 ft (20.7 m) and a deck 42 ft wide.
Who owns US421N over Big Alamance Creek?
It is owned by the State Highway Agency.