I-81 Sbl over Duncan Run
GoodFrederick County, Virginia · 2.23 to 672 - 0.31 to 669 · Structure no. 000000000008144
- Built
- 1965
- 60 years old
- Condition
- Good
- inspected March 2025
- Type
- Culvert
- Concrete
- Length
- 38 ft
- 4 main spans
- Daily traffic
- 26,778
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
I-81 Sbl over Duncan Run is a concrete culvert carrying I-81 Sbl over Duncan Run in Frederick County, Virginia. It was built in 1965, so it is 60 years old, older than the Virginia average of 50.7 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 26,778 vehicles a day, roughly 1% of them trucks, projected to reach 34,707 by 2045. The structure is 38 ft (11.6 m) long. If it were closed, the detour would be 1.2 mi (2 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 |
|---|---|---|
| Channel and channel protection | 8 Very Good | No problems noted. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-81 Sbl over Duncan Run built?
It was built in 1965, making it 60 years old in 2025.
What condition is I-81 Sbl over Duncan Run 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 March 2025.
How much traffic does I-81 Sbl over Duncan Run carry?
About 26,778 vehicles per day (2022 count), of which roughly 1% are trucks.
How long is I-81 Sbl over Duncan Run?
The structure is 38 ft (11.6 m) long with a longest span of 9 ft (2.7 m).
Who owns I-81 Sbl over Duncan Run?
It is owned by the State Highway Agency.