I-24 Nc over Knob Creek
Lyon County, Kentucky · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I-24 Nc over Knob Creek in Lyon County, Kentucky, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1977, making it 48 years old at the 2025 inventory.
- It carries about 14,006 vehicles a day (traffic count year 2019).
- Its listed owner is the state highway agency.
- It is one of 65 of the 79 inventoried bridges in Lyon County rated fair (82.3%); 3 (3.8%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (fair), but component ratings moved: superstructure 7 to 6.
- Its most recent inspection on record is dated March 2024, 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 → (37.07194, -88.09861)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 7 | 6 | Satisfactory condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous prestressed concrete stringer or multi-beam girder |
| Length | about 184 ft |
| Location | Wbl .05 East of Ky 295 Op |
| NBI structure number | 072B00039L |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | March 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Kentucky department of transportation.
Busiest bridges in Lyon County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-24 over P&l Railway | 1977 | 16,469 | Fair |
| I-24 over P&l Railway | 1977 | 16,469 | Fair |
| I-24 Nc over Ky 93 | 1977 | 16,469 | Fair |
| I-24 over Ky 93 | 1977 | 16,469 | Fair |
| I-24 Nc over US 62 | 1977 | 14,006 | Fair |
| I-24 over US 62 | 1977 | 14,006 | Fair |
All bridges nearby: Lyon County, KY bridge conditions · every bridge in Lyon County · Kentucky bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.