Nfa A507 over Nolichucky River
Hamblen County, Tennessee · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Nfa A507 over Nolichucky River in Hamblen County, Tennessee, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1989, making it 36 years old at the 2025 inventory.
- It carries about 290 vehicles a day (traffic count year 2020).
- Its listed owner is the county highway agency.
- It is one of 97 of the 119 inventoried bridges in Hamblen County rated fair (81.5%); 3 (2.5%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (fair), but component ratings moved: substructure 5 to 6.
- Its most recent inspection on record is dated September 2023, 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 → (36.1773, -83.1854)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 5 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 377 ft |
| Location | 2.5MI Southeast of I81 |
| NBI structure number | 320A5070003 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | September 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Tennessee department of transportation.
Busiest bridges in Hamblen County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I81 730393A over Southern Railway | 1967 | 49,004 | Fair |
| I81 730393A over Southern Railway | 1967 | 49,004 | Fair |
| I81 over Sinking Fork Creek | 1964 | 49,004 | Fair |
| Ramp SR32 to I81SB over SR-32 Ramp/norf So RR | 2013 | 49,004 | Good |
| I81 over Flat Creek | 1970 | 45,697 | Poor |
| I81 over East Fork Flat Creek | 1971 | 45,697 | Fair |
All bridges nearby: Hamblen County, TN bridge conditions · every bridge in Hamblen County · Tennessee bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.