Bridge conditions in Miami County, Ohio
312 inventoried bridges · 18 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 312 bridges in Miami County: 218 rated good, 76 fair, and 18 poor.
- 18 of the 312 bridges in Miami County, Ohio, are rated in poor condition (5.8%) in the 2025 National Bridge Inventory, as of .
- 218 bridges (69.9%) are rated good and 76 (24.4%) fair.
- The median Miami County bridge was built in 1984.
- The busiest poor-rated bridge is Kessler-frederick over Stoner Ditch (built 1954), carrying about 3,227 vehicles a day.
Good 69.9% · Fair 24.4% · Poor 5.8% of 312 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Kessler-frederick over Stoner Ditch | 1954 | 3,227 | Poor |
| Swailes over Boone Creek | 1961 | 2,062 | Poor |
| Swailes over Boone Creek | 1963 | 2,062 | Poor |
| Piqua-lockington over Miami River | 1972 | 1,373 | Poor |
| Range Line over Brush Creek | 1962 | 1,244 | Poor |
| Fenner over Possum Run | 1941 | 1,077 | Poor |
| Casstown-sidney over Little Lost Creek | 1963 | 797 | Poor |
| Casstown-sidney over Middle Branch Lost Creek | 1961 | 797 | Poor |
| Sodom-ballou North over A J Allen Ditch | 1955 | 797 | Poor |
| Snyder over West Branch Lost Creek | 1979 | 797 | Poor |
| Snodgrass over Spring Creek | 1961 | 485 | Poor |
| Deweese over Spring Creek | 1982 | 404 | Poor |
| Peterson over East Branch Lost Creek | 1960 | 383 | Poor |
| Klinger over Stillwater River | 1966 | 328 | Poor |
| Duncan North over Hetzler Ditch | 1956 | 324 | Poor |
| Alcony-conover over Leatherwood Ditch | 1965 | 222 | Poor |
| Wright over Ludlow Creek | 1956 | 208 | Poor |
| Lostcreek-shelby over East Branch Lost Creek | 1904 | 164 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ir 75 over Ext of Boone Creek | 2001 | 66,840 | Good |
| Ir-75 over Clayton Ext. of Peters C | 1957 | 66,840 | Good |
| Ir-75 over W. Branch of Peters Cree | 1957 | 66,840 | Good |
| Ir-75 over Branch Great Miami River | 1957 | 54,110 | Fair |
| Ir-75 over County Ditch | 1957 | 54,110 | Fair |
| Ir-75 over Howell Extension Ditch | 1957 | 54,110 | Good |
| Ir-75 over Branch Great Miami River | 2019 | 49,910 | Good |
| Ir-75 over Branch Great Miami River | 2020 | 49,910 | Good |
| Ir-75 over Rush Creek | 2022 | 49,000 | Good |
| Ir-75 over Rush Creek | 2022 | 49,000 | Good |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Ohio: Ohio bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.