US 421 over Slickway Branch
Franklin County, Kentucky · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 421 over Slickway Branch in Franklin County, Kentucky, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1949 and reconstructed in 2010, making it 76 years old at the 2025 inventory.
- It carries about 13,277 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 89 of the 117 inventoried bridges in Franklin County rated fair (76.1%); 13 (11.1%) are rated poor.
- 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 → (38.18694, -84.80278)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 5 | Fair condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 24 ft |
| Location | 2 Mi N of Woodford Cl |
| NBI structure number | 037B00009N |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Kentucky department of transportation.
Busiest bridges in Franklin County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-64 & Ky 2817 over Trib to S Benson Creek | 1960 | 43,091 | Fair |
| I-64 over Ky 1665 | 2024 | 43,091 | Good |
| I-64 over Ky 2817 | 2024 | 43,091 | Fair |
| I-64 over Hickman Branch | 1972 | 38,908 | Fair |
| US 60 over Rj Corman Railroad | 1960 | 27,413 | Fair |
| US 60 over Ky 676 (e-w Conn) | 1978 | 27,413 | Fair |
All bridges nearby: Franklin County, KY bridge conditions · every bridge in Franklin County · Kentucky bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.