SR 603 over Black Fork
Richland County, Ohio · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SR 603 over Black Fork in Richland County, Ohio, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1958, making it 67 years old at the 2025 inventory.
- It carries about 1,195 vehicles a day (traffic count year 2015).
- Its listed owner is the state highway agency.
- It is one of 105 of the 358 inventoried bridges in Richland County rated fair (29.3%); 18 (5.0%) are rated poor.
- 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 → (40.72077, -82.37353)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 6 | Satisfactory condition |
| Superstructure | 6 | Satisfactory condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 138 ft |
| Location | .66 Miles North of SR 39 |
| NBI structure number | 7007116 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Ohio department of transportation.
Busiest bridges in Richland County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Usr 30 over over Ric-039-1385 | 2021 | 40,950 | Good |
| Usr 30 over over Ric-215-0133 Ch | 2021 | 40,230 | Good |
| Usr 30 over over Ric-545-0198 | 2021 | 35,400 | Good |
| Usr 30 over over Ashland Railway | 2021 | 28,500 | Good |
| Ir 71 over Ric-546-0384 | 2006 | 24,252 | Good |
| Ir 71 over Ric-546-0382 | 2006 | 24,252 | Good |
All bridges nearby: Richland County, OH bridge conditions · every bridge in Richland County · Ohio bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.