Nfa 994 (sa 9422) over West Harpeth River
GoodWilliamson County, Tennessee · 3.6 MI S JCT SR46&SR96 · Structure no. 94F00080003
- Built
- 2009
- 16 years old
- Condition
- Good
- inspected May 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 112 ft
- 3 main spans
- Daily traffic
- 2,724
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
Nfa 994 (sa 9422) over West Harpeth River is a prestressed concrete continuous box beam or girders - multiple carrying Nfa 994 (sa 9422) over West Harpeth River in Williamson County, Tennessee. It was built in 2009, so it is 16 years old, younger 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 2,724 vehicles a day, roughly 3% of them trucks, projected to reach 3,450 by 2041. The structure is 112 ft (34.1 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Nfa 994 (sa 9422) over West Harpeth River built?
It was built in 2009, making it 16 years old in 2025.
What condition is Nfa 994 (sa 9422) over West Harpeth 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 May 2023.
How much traffic does Nfa 994 (sa 9422) over West Harpeth River carry?
About 2,724 vehicles per day (2021 count), of which roughly 3% are trucks.
How long is Nfa 994 (sa 9422) over West Harpeth River?
The structure is 112 ft (34.1 m) long with a longest span of 55 ft (16.8 m) and a deck 32 ft wide.
Who owns Nfa 994 (sa 9422) over West Harpeth River?
It is owned by the County Highway Agency.