US421 Nbl over Yadkin River
FairForsyth County, North Carolina · 0.6 Mi. S. Jct. SR1570 · Structure no. 000000000670055
- Built
- 1958
- 67 years old
- Condition
- Fair
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 621 ft
- 5 main spans
- Daily traffic
- 28,000
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US421 Nbl over Yadkin River is a steel continuous stringer/multi-beam or girder carrying US421 Nbl over Yadkin River in Forsyth County, North Carolina. It was built in 1958, so it is 67 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 5 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 28,000 vehicles a day, roughly 14% of them trucks, projected to reach 56,000 by 2040. The structure is 621 ft (189.2 m) long and 33 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US421 Nbl over Yadkin River built?
It was built in 1958, making it 67 years old in 2025.
What condition is US421 Nbl over Yadkin River 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 July 2024.
How much traffic does US421 Nbl over Yadkin River carry?
About 28,000 vehicles per day (2022 count), of which roughly 14% are trucks.
How long is US421 Nbl over Yadkin River?
The structure is 621 ft (189.2 m) long with a longest span of 80 ft (24.3 m) and a deck 33 ft wide.
Who owns US421 Nbl over Yadkin River?
It is owned by the State Highway Agency.