Nfa 990 (sa 9425) over Harpeth River
Williamson County, Tennessee · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Nfa 990 (sa 9425) over Harpeth River in Williamson County, Tennessee, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- It was built in 1962, making it 63 years old at the 2025 inventory.
- It carries about 11,007 vehicles a day (traffic count year 2021).
- Its listed owner is the county highway agency.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (36.02873, -86.92395)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 5 | Fair condition |
| Substructure | 4 | Poor condition |
Bridge details
| Structure | Concrete tee beam |
| Length | about 414 ft |
| Location | 2.5 Mi NW Jct SR 46&sr106 |
| NBI structure number | 94S63230005 |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Tennessee department of transportation.
All bridges nearby: Williamson County, TN bridge conditions · Tennessee bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.