CR 21B over Miami River
Logan County, Ohio · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- CR 21B over Miami River in Logan County, Ohio, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- It was built in 1882 and reconstructed in 1997, making it 143 years old at the 2025 inventory.
- It carries about 816 vehicles a day (traffic count year 2015).
- Its listed owner is the county highway agency.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (40.35117, -83.93833)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 4 | Poor condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Steel through truss |
| Length | about 143 ft |
| Location | .05 M W of CR 21 |
| NBI structure number | 4631838 |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Ohio department of transportation.
All bridges nearby: Logan County, OH bridge conditions · Ohio bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.