US421 Sbl over Muddy Creek
GoodForsyth County, North Carolina · 0.4 Mi. N. Jct. SR1140 · Structure no. 000000000670221
- Built
- 2011
- 14 years old
- Condition
- Good
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 213 ft
- 3 main spans
- Daily traffic
- 23,000
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
US421 Sbl over Muddy Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying US421 Sbl over Muddy Creek in Forsyth County, North Carolina. It was built in 2011, so it is 14 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 23,000 vehicles a day, roughly 12% of them trucks, projected to reach 46,000 by 2040. The structure is 213 ft (64.9 m) long and 80 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 | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US421 Sbl over Muddy Creek built?
It was built in 2011, making it 14 years old in 2025.
What condition is US421 Sbl over Muddy 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 July 2024.
How much traffic does US421 Sbl over Muddy Creek carry?
About 23,000 vehicles per day (2021 count), of which roughly 12% are trucks.
How long is US421 Sbl over Muddy Creek?
The structure is 213 ft (64.9 m) long with a longest span of 88 ft (26.8 m) and a deck 80 ft wide.
Who owns US421 Sbl over Muddy Creek?
It is owned by the State Highway Agency.