Nfa A531 (sa 5414) over Oostanaula Creek
McMinn County, Tennessee · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Nfa A531 (sa 5414) over Oostanaula Creek in McMinn County, Tennessee, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1970, making it 55 years old at the 2025 inventory.
- It carries about 3,152 vehicles a day (traffic count year 2021).
- Its listed owner is a city or municipal highway agency.
- It is one of 133 of the 219 inventoried bridges in McMinn County rated fair (60.7%); 6 (2.7%) 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 July 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 → (35.44087, -84.59177)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Prestressed concrete single box beam |
| Length | about 71 ft |
| Location | In Athens Tenn. |
| NBI structure number | 540A6260001 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | July 2023 |
| 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 McMinn County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I75 Nbl over Mouse Creek | 1971 | 47,306 | Good |
| I75 Sbl over Mouse Creek | 1971 | 47,306 | Fair |
| I75 Nbl over Nfa A486 | 1971 | 47,306 | Fair |
| I75 Sbl over Nfa A486 | 1971 | 47,306 | Fair |
| I75 Nbl over Nfa 2334 | 1971 | 47,306 | Fair |
| I75 over Nfa 2334 | 1971 | 47,306 | Fair |
All bridges nearby: McMinn County, TN bridge conditions · every bridge in McMinn County · Tennessee bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.