I81 over South Fork Holston River
GoodSullivan County, Tennessee · 1 M NE JCT I81&SR36 · Structure no. 82I00810018
- Built
- 1973
- 52 years old
- Condition
- Good
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 1,024 ft
- 4 main spans
- Daily traffic
- 32,258
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
I81 over South Fork Holston River is a steel continuous stringer/multi-beam or girder carrying I81 over South Fork Holston River in Sullivan 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 32,258 vehicles a day, roughly 6% of them trucks, projected to reach 51,613 by 2042. The structure is 1,024 ft (312.1 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. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I81 over South Fork Holston River built?
It was built in 1973, making it 52 years old in 2025.
What condition is I81 over South Fork Holston River 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 August 2024.
How much traffic does I81 over South Fork Holston River carry?
About 32,258 vehicles per day (2021 count), of which roughly 6% are trucks.
How long is I81 over South Fork Holston River?
The structure is 1,024 ft (312.1 m) long with a longest span of 315 ft (96 m) and a deck 44 ft wide.
Who owns I81 over South Fork Holston River?
It is owned by the State Highway Agency.