US421 over Silas Creek
FairForsyth County, North Carolina · 1.3 Mi. N. Jct. I40 · Structure no. 000000000670234
- Built
- 1960
- 65 years old
- Condition
- Fair
- inspected September 2024
- Type
- Culvert
- Concrete Continuous
- Length
- 53 ft
- 3 main spans
- Daily traffic
- 61,500
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US421 over Silas Creek is a concrete continuous culvert carrying US421 over Silas Creek in Forsyth County, North Carolina. It was built in 1960, so it is 65 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 61,500 vehicles a day, roughly 12% of them trucks, projected to reach 123,000 by 2040. The structure is 53 ft (16.1 m) long. 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 |
|---|---|---|
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US421 over Silas Creek built?
It was built in 1960, making it 65 years old in 2025.
What condition is US421 over Silas 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 September 2024.
How much traffic does US421 over Silas Creek carry?
About 61,500 vehicles per day (2022 count), of which roughly 12% are trucks.
How long is US421 over Silas Creek?
The structure is 53 ft (16.1 m) long with a longest span of 12 ft (3.6 m).
Who owns US421 over Silas Creek?
It is owned by the State Highway Agency.