I81 over Dark Hollow RD (A166)
GoodWashington County, Tennessee · .3 M SW of Sullivan CO LN · Structure no. 90I00810008
- Built
- 1973
- 52 years old
- Condition
- Good
- inspected September 2023
- Type
- Tee Beam
- Concrete Continuous
- Length
- 159 ft
- 3 main spans
- Daily traffic
- 53,763
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
I81 over Dark Hollow RD (A166) is a concrete continuous tee beam carrying I81 over Dark Hollow RD (A166) in Washington County, Tennessee. It was built in 1973, so it is 52 years old, older than the Tennessee average of 47.4 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 53,763 vehicles a day, roughly 6% of them trucks, projected to reach 86,021 by 2042. The structure is 159 ft (48.5 m) long and 44 ft wide. 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 |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I81 over Dark Hollow RD (A166) built?
It was built in 1973, making it 52 years old in 2025.
What condition is I81 over Dark Hollow RD (A166) 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 September 2023.
How much traffic does I81 over Dark Hollow RD (A166) carry?
About 53,763 vehicles per day (2021 count), of which roughly 6% are trucks.
How long is I81 over Dark Hollow RD (A166)?
The structure is 159 ft (48.5 m) long with a longest span of 65 ft (19.8 m) and a deck 44 ft wide.
Who owns I81 over Dark Hollow RD (A166)?
It is owned by the State Highway Agency.