Nfa A324 over West Harpeth River
GoodWilliamson County, Tennessee · 1.2 MI NW JCT SR6&SR248 · Structure no. 940A3240001
- Built
- 1982
- 43 years old
- Condition
- Good
- inspected May 2023
- Type
- Box Beam or Girders - Single or Spread
- Prestressed Concrete Continuous
- Length
- 80 ft
- 2 main spans
- Daily traffic
- 480
- 2020 count
- Owner
- County
- County Highway Agency
About this bridge
Nfa A324 over West Harpeth River is a prestressed concrete continuous box beam or girders - single or spread carrying Nfa A324 over West Harpeth River in Williamson County, Tennessee. It was built in 1982, so it is 43 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 480 vehicles a day, roughly 2% of them trucks, projected to reach 768 by 2041. The structure is 80 ft (24.4 m) long and 28 ft wide. If it were closed, the detour would be 9.9 mi (16 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Nfa A324 over West Harpeth River built?
It was built in 1982, making it 43 years old in 2025.
What condition is Nfa A324 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 A324 over West Harpeth River carry?
About 480 vehicles per day (2020 count), of which roughly 2% are trucks.
How long is Nfa A324 over West Harpeth River?
The structure is 80 ft (24.4 m) long with a longest span of 39 ft (11.9 m) and a deck 28 ft wide.
Who owns Nfa A324 over West Harpeth River?
It is owned by the County Highway Agency.