Nfa A170 over I81
Greene County, Tennessee · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Nfa A170 over I81 in Greene 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 1968, making it 57 years old at the 2025 inventory.
- It carries about 70 vehicles a day (traffic count year 2020).
- Its listed owner is the state highway agency.
- It is one of 87 of the 305 inventoried bridges in Greene County rated good (28.5%); 9 (3.0%) 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 → (36.2779, -82.91321)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 7 | Good condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Continuous concrete multiple box beam |
| Length | about 475 ft |
| Location | Just East of SR 70 Exit |
| NBI structure number | 30I00810033 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Tennessee department of transportation.
Busiest bridges in Greene County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I81 over Pine Grove Rd (A443) | 1968 | 44,318 | Fair |
| I81 over Pine Grove Rd (A443) | 1968 | 44,318 | Good |
| I81 over Potter Creek | 1970 | 44,318 | Fair |
| I81 over Potter Creek | 1970 | 44,318 | Fair |
| I81 over Branch | 1970 | 44,318 | Fair |
| I81 over Branch | 1970 | 44,318 | Fair |
All bridges nearby: Greene County, TN bridge conditions · every bridge in Greene County · Tennessee bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.