Ky 664 over Sulphur Creek
Simpson County, Kentucky · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Ky 664 over Sulphur Creek in Simpson County, Kentucky, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2021, making it 4 years old at the 2025 inventory.
- It carries about 545 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 20 of the 51 inventoried bridges in Simpson County rated good (39.2%); 3 (5.9%) 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 July 2023, 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 → (36.71306, -86.68083)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Prestressed concrete multiple box beam |
| Length | about 57 ft |
| Location | 0.1 MI W of JCT KY 1885 |
| NBI structure number | 107B00056N |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | July 2023 |
| Inspection interval (item 91) | 48 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 Simpson County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-65 over Ky 100 | 2008 | 56,578 | Fair |
| I-65 over West Fork Drakes Creek | 2007 | 56,578 | Fair |
| I-65 over U.S. 31W | 2007 | 52,337 | Fair |
| I-65 over CSX Railroad | 2007 | 52,337 | Fair |
| I-65 over West Fork Drakes Creek | 2007 | 52,337 | Fair |
| US 31W over Sharps Branch | 2017 | 12,198 | Good |
All bridges nearby: Simpson County, KY bridge conditions · every bridge in Simpson County · Kentucky bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.