I85 Nbl US421 Sbl over SR3505 Southern Railroa
GoodGuilford County, North Carolina · 0.25 Mi. N. Jct. SR3300 · Structure no. 000000000810806
- Built
- 2003
- 22 years old
- Condition
- Good
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 251 ft
- 2 main spans
- Daily traffic
- 29,250
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
I85 Nbl US421 Sbl over SR3505 Southern Railroa is a steel continuous stringer/multi-beam or girder carrying I85 Nbl US421 Sbl over SR3505 Southern Railroa in Guilford County, North Carolina. It was built in 2003, so it is 22 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 29,250 vehicles a day, roughly 16% of them trucks, projected to reach 58,500 by 2040. The structure is 251 ft (76.5 m) long and 74 ft wide. If it were closed, the detour would be 5 mi (8 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I85 Nbl US421 Sbl over SR3505 Southern Railroa built?
It was built in 2003, making it 22 years old in 2025.
What condition is I85 Nbl US421 Sbl over SR3505 Southern Railroa 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 October 2023.
How much traffic does I85 Nbl US421 Sbl over SR3505 Southern Railroa carry?
About 29,250 vehicles per day (2020 count), of which roughly 16% are trucks.
How long is I85 Nbl US421 Sbl over SR3505 Southern Railroa?
The structure is 251 ft (76.5 m) long with a longest span of 126 ft (38.4 m) and a deck 74 ft wide.
Who owns I85 Nbl US421 Sbl over SR3505 Southern Railroa?
It is owned by the State Highway Agency.