Nfa A166 over Red River
Robertson County, Tennessee · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Nfa A166 over Red River in Robertson County, Tennessee, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1979, making it 46 years old at the 2025 inventory.
- It carries about 230 vehicles a day (traffic count year 2020).
- Its listed owner is the county highway agency.
- It is one of 59 of the 204 inventoried bridges in Robertson County rated fair (28.9%); 2 (1.0%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated April 2024, on a 24-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (36.59683, -86.6325)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous prestressed concrete stringer or multi-beam girder |
| Length | about 100 ft |
| Location | 2.3 Mi W Jct SR41&SR52 |
| NBI structure number | 740A1660001 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | April 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | U: unknown foundation, not evaluated for scour |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Tennessee department of transportation.
Busiest bridges in Robertson County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I24 over Hollis Creek | 1973 | 75,818 | Good |
| I24 over Mcmahon Hollow Rd | 1972 | 75,818 | Good |
| I24 over Mcmahon Hollow Rd | 1972 | 75,818 | Good |
| I24 over Sycamore Creek | 1972 | 75,818 | Good |
| I24 over Sycamore Creek | 1972 | 75,818 | Good |
| I24 over Passenger Creek | 1973 | 66,659 | Good |
All bridges nearby: Robertson County, TN bridge conditions · every bridge in Robertson County · Tennessee bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.