Ky-550 over Left Fk Troublesome Crk
Knott County, Kentucky · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Ky-550 over Left Fk Troublesome Crk in Knott County, Kentucky, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 7 (good condition) on the 0-9 scale.
- It was built in 2003, making it 22 years old at the 2025 inventory.
- It carries about 1,277 vehicles a day (traffic count year 2020).
- Its listed owner is the state highway agency.
- It is one of 58 of the 141 inventoried bridges in Knott County rated good (41.1%); 14 (9.9%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (good), but component ratings moved: deck 7 to 8, superstructure 7 to 8.
- Its most recent inspection on record is dated June 2024, on a 24-month routine inspection cycle.
- 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 → (37.33556, -82.98111)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 8 | Very good condition |
| Superstructure | 7 | 8 | Very good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete multiple box beam |
| Length | about 47 ft |
| Location | .10 Mi West Jct Ky 160 |
| NBI structure number | 060B00077N |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | June 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 Knott County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ky-160 over R Frk Troublesome Crk | 1941 | 7,613 | Fair |
| Ky-160 over Lt Fk Troublesome Creek | 1978 | 6,705 | Fair |
| Ky-899 over Rt Fk Troublesome Crk | 1998 | 4,811 | Good |
| Ky-15 over Carr Fork Lake | 1972 | 4,778 | Fair |
| Ky-15 over Red Oak Branch | 1972 | 4,778 | Good |
| Ky-15 over Carr Fork Reservoir | 1972 | 4,604 | Fair |
All bridges nearby: Knott County, KY bridge conditions · every bridge in Knott County · Kentucky bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.