US-421 over Cowbell Creek
Madison County, Kentucky · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US-421 over Cowbell Creek in Madison County, Kentucky, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2019, making it 6 years old at the 2025 inventory.
- It carries about 3,347 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 39 of the 157 inventoried bridges in Madison County rated good (24.8%); 13 (8.3%) 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 → (37.555, -84.20861)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 8 | Very good condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 23 ft |
| Location | 50 Ft N of Jct Ky 21 |
| NBI structure number | 076B00121N |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Kentucky department of transportation.
Busiest bridges in Madison County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-75 over Ky 52 | 2002 | 66,135 | Fair |
| I-75 over Ky 595 | 2003 | 64,079 | Fair |
| I-75 over Walnut Meadow Branch | 1966 | 59,929 | Fair |
| I-75 Nc over Ky 169 | 1999 | 34,709 | Good |
| I-75 over Ky 169 | 1999 | 34,709 | Good |
| I-75 Nc over Silver Creek&menelaus Rd | 2003 | 32,040 | Fair |
All bridges nearby: Madison County, KY bridge conditions · every bridge in Madison County · Kentucky bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.