Nfa 810 (sa 8421) over Overflow
GoodTipton County, Tennessee · 1.8 MI W of Mason · Structure no. 84S80710013
- Built
- 1960
- 65 years old
- Condition
- Good
- inspected February 2024
- Type
- Culvert
- Concrete Continuous
- Length
- 23 ft
- 2 main spans
- Daily traffic
- 2,044
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
Nfa 810 (sa 8421) over Overflow is a concrete continuous culvert carrying Nfa 810 (sa 8421) over Overflow in Tipton County, Tennessee. It was built in 1960, so it is 65 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 2,044 vehicles a day, roughly 3% of them trucks, projected to reach 3,024 by 2042. The structure is 23 ft (7 m) long and 29 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 |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Nfa 810 (sa 8421) over Overflow built?
It was built in 1960, making it 65 years old in 2025.
What condition is Nfa 810 (sa 8421) over Overflow 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 February 2024.
How much traffic does Nfa 810 (sa 8421) over Overflow carry?
About 2,044 vehicles per day (2021 count), of which roughly 3% are trucks.
How long is Nfa 810 (sa 8421) over Overflow?
The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m) and a deck 29 ft wide.
Who owns Nfa 810 (sa 8421) over Overflow?
It is owned by the County Highway Agency.