Gum Sulpher Rd over Trib. to Dix River
Rockcastle County, Kentucky · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Gum Sulpher Rd over Trib. to Dix River in Rockcastle County, Kentucky, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1976, making it 49 years old at the 2025 inventory.
- It carries about 76 vehicles a day (traffic count year 2019).
- Its listed owner is the county highway agency.
- It is one of 62 of the 87 inventoried bridges in Rockcastle County rated fair (71.3%); 8 (9.2%) 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.
- Status change: newly posted for load since 2024.
- Its most recent inspection on record is dated January 2023, 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 → (37.42361, -84.45667)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Prestressed concrete multiple box beam |
| Length | about 29 ft |
| Location | .05 Mi NE of Jct US 150 |
| NBI structure number | 102C00025N |
| Condition class | Fair |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | January 2023 |
| 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 Rockcastle County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-75 over Lambert Road | 1967 | 47,638 | Fair |
| I-75 over Clay Lick Branch | 1967 | 47,638 | Fair |
| I-75 over Green Hill Road | 2018 | 47,638 | Good |
| I-75 over US-25 | 2018 | 47,638 | Good |
| I-75 over US-25 | 2020 | 40,386 | Good |
| I-75 over Flat Gap Road | 1967 | 23,819 | Fair |
All bridges nearby: Rockcastle County, KY bridge conditions · every bridge in Rockcastle County · Kentucky bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.