Nfa 810 (sa 8421) over Overflow
Tipton County, Tennessee · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Nfa 810 (sa 8421) over Overflow in Tipton County, Tennessee, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 1960, making it 65 years old at the 2025 inventory.
- It carries about 2,044 vehicles a day (traffic count year 2021).
- Its listed owner is the county highway agency.
- It is one of 84 of the 202 inventoried bridges in Tipton County rated good (41.6%); 13 (6.4%) are rated poor.
- 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 → (35.41314, -89.57322)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 7 | Good condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 22 ft |
| Location | 1.9 Mi W of Mason |
| NBI structure number | 84S80710017 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Tennessee department of transportation.
Busiest bridges in Tipton County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Fap 3 over Big Creek | 1966 | 24,851 | Fair |
| Fap 3 over Big Creek | 1927 | 24,851 | Fair |
| Fap 3 over Branch | 1933 | 16,419 | Fair |
| Fap 3 over Branch | 1965 | 16,419 | Fair |
| Fap 3 over Median Ditch | 1975 | 16,419 | Fair |
| Fap 3 over Frog Branch | 1965 | 16,405 | Fair |
All bridges nearby: Tipton County, TN bridge conditions · every bridge in Tipton County · Tennessee bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.