KY-3 RMP to KY-645 over Ky-645
Martin County, Kentucky · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- KY-3 RMP to KY-645 over Ky-645 in Martin County, Kentucky, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 2009, making it 16 years old at the 2025 inventory.
- It carries about 3,054 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 22 of the 70 inventoried bridges in Martin County rated good (31.4%); 10 (14.3%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (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 48-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 → (37.84889, -82.54167)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 734 ft |
| Location | @ Jct Ky 3/645 |
| NBI structure number | 080B00043N |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2024 |
| Inspection interval (item 91) | 48 months |
| Scour (item 113) | N: not over a waterway |
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.