Ky-40 over Rockhouse Fork
Martin County, Kentucky · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Ky-40 over Rockhouse Fork in Martin County, Kentucky, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1927, making it 98 years old at the 2025 inventory.
- It carries about 1,045 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 38 of the 70 inventoried bridges in Martin County rated fair (54.3%); 10 (14.3%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated August 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 → (37.885, -82.58194)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete tee beam |
| Length | about 84 ft |
| Location | 0.05 MI E of JCT KY 1884 |
| NBI structure number | 080B00004N |
| Condition class | Fair |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | August 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 Martin County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ky-40 over Rockcastle Creek | 1953 | 4,804 | Poor |
| Ky-645 over Middle Fork | 2004 | 4,537 | Good |
| Ky-645 over Becca Liz Ln | 2005 | 4,537 | Good |
| Ky-645 over KY-40 & Coldwater Fork | 2010 | 4,537 | Good |
| Ky-645 Ramp Ky-40 over Coldwater Fork | 2006 | 4,537 | Good |
| Ky 40 over Buck Creek | 1929 | 4,308 | Good |
All bridges nearby: Martin County, KY bridge conditions · every bridge in Martin County · Kentucky bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.