Nfa A170 over I81
GoodGreene County, Tennessee · Just East of SR 70 Exit · Structure no. 30I00810033
- Built
- 1968
- 57 years old
- Condition
- Good
- inspected July 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 476 ft
- 6 main spans
- Daily traffic
- 70
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
Nfa A170 over I81 is a concrete continuous box beam or girders - multiple carrying Nfa A170 over I81 in Greene County, Tennessee. It was built in 1968, so it is 57 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 70 vehicles a day, roughly 2% of them trucks, projected to reach 112 by 2042. The structure is 476 ft (145 m) long and 32 ft wide. If it were closed, the detour would be 6.8 mi (11 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 Nfa A170 over I81 built?
It was built in 1968, making it 57 years old in 2025.
What condition is Nfa A170 over I81 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 Nfa A170 over I81 carry?
About 70 vehicles per day (2020 count), of which roughly 2% are trucks.
How long is Nfa A170 over I81?
The structure is 476 ft (145 m) long with a longest span of 106 ft (32.4 m) and a deck 32 ft wide.
Who owns Nfa A170 over I81?
It is owned by the State Highway Agency.