Nfa A505 over Big Fiery Gizzard Creek
Marion County, Tennessee · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Nfa A505 over Big Fiery Gizzard Creek in Marion County, Tennessee, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1992, making it 33 years old at the 2025 inventory.
- It carries about 50 vehicles a day (traffic count year 2020).
- Its listed owner is the county highway agency.
- It is one of 88 of the 177 inventoried bridges in Marion County rated fair (49.7%); 6 (3.4%) 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 October 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 → (35.14962, -85.70592)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete tee beam |
| Length | about 89 ft |
| Location | 3.5 Mi NE Jct I24&SR2 |
| NBI structure number | 580A5050005 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Tennessee department of transportation.
Busiest bridges in Marion County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I24 EB over Running Water Creek | 1965 | 54,610 | Good |
| I24 WB over Running Water Creek | 1965 | 54,610 | Good |
| I24 over Moroney Gulf Branch | 1965 | 54,610 | Fair |
| I24 over Running Water Creek | 1965 | 54,610 | Fair |
| I24 over Running Water Creek | 1965 | 54,610 | Good |
| I24 over Murphy Hollow Creek | 1965 | 54,610 | Fair |
All bridges nearby: Marion County, TN bridge conditions · every bridge in Marion County · Tennessee bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.