US421S over Big Alamance Creek
GoodGuilford County, North Carolina · 0.5 Mi. S. Jct. SR3389 · Structure no. 000000000810277
- Built
- 1969
- 56 years old
- Condition
- Good
- inspected April 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 205 ft
- 4 main spans
- Daily traffic
- 14,000
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
US421S over Big Alamance Creek is a steel stringer/multi-beam or girder carrying US421S 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 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 14,000 vehicles a day, roughly 12% of them trucks, projected to reach 28,000 by 2040. The structure is 205 ft (62.4 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
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 US421S over Big Alamance Creek built?
It was built in 1969, making it 56 years old in 2025.
What condition is US421S over Big Alamance Creek 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 April 2024.
How much traffic does US421S over Big Alamance Creek carry?
About 14,000 vehicles per day (2021 count), of which roughly 12% are trucks.
How long is US421S over Big Alamance Creek?
The structure is 205 ft (62.4 m) long with a longest span of 61 ft (18.5 m) and a deck 42 ft wide.
Who owns US421S over Big Alamance Creek?
It is owned by the State Highway Agency.