Nfa A423 over Tva Loop Ramp / SR-1
Humphreys County, Tennessee · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Nfa A423 over Tva Loop Ramp / SR-1 in Humphreys County, Tennessee, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 2001, making it 24 years old at the 2025 inventory.
- It carries about 500 vehicles a day (traffic count year 2020).
- Its listed owner is the state highway agency.
- It is one of 169 of the 252 inventoried bridges in Humphreys County rated fair (67.1%); 9 (3.6%) 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 → (36.01853, -87.98309)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Continuous prestressed concrete stringer or multi-beam girder |
| Length | about 280 ft |
| Location | at SR1 New Johnsonville |
| NBI structure number | 43SR0010031 |
| 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) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Tennessee department of transportation.
Busiest bridges in Humphreys County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I40 over Branch | 1965 | 35,730 | Fair |
| I40 over Branch | 1965 | 35,730 | Fair |
| I40 over South Fork Blue Creek | 1965 | 35,649 | Fair |
| I40 over South Fork Blue Creek | 1965 | 35,649 | Fair |
| I40 over Branch | 1964 | 35,368 | Fair |
| I40 over Branch | 1964 | 35,368 | Fair |
All bridges nearby: Humphreys County, TN bridge conditions · every bridge in Humphreys County · Tennessee bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.