Nfa A501 over Big Fiery Gizzard Creek
Marion County, Tennessee · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Nfa A501 over Big Fiery Gizzard Creek in Marion County, Tennessee, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 1964, making it 61 years old at the 2025 inventory.
- It carries about 40 vehicles a day (traffic count year 2020).
- Its listed owner is the county highway agency.
- It is one of 83 of the 177 inventoried bridges in Marion County rated good (46.9%); 6 (3.4%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- It was rated fair in the 2024 inventory and is now good (substructure 6 to 7).
- Its most recent inspection on record is dated October 2024, on a 24-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (35.10865, -85.74488)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 6 | 7 | Good condition |
Bridge details
| Structure | Continuous prestressed concrete stringer or multi-beam girder |
| Length | about 198 ft |
| Location | 0.3 Mi SE Jct I24&SR2 |
| NBI structure number | 580A5010001 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2024 |
| 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 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.