Bridge conditions in Union County, Ohio
221 inventoried bridges · 8 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
8 of the 221 bridges the federal inventory lists in Union County are rated poor; the rest split 149 good and 64 fair.
- 8 of the 221 bridges in Union County, Ohio, are rated in poor condition (3.6%) in the 2025 National Bridge Inventory, as of .
- 149 bridges (67.4%) are rated good and 64 (29.0%) fair.
- The median Union County bridge was built in 1987.
- The busiest poor-rated bridge is US 36 over Mill Creek (built 1950), carrying about 18,155 vehicles a day.
Good 67.4% · Fair 29.0% · Poor 3.6% of 221 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 |
|---|---|---|---|
| US 36 over Mill Creek | 1950 | 18,155 | Poor |
| Usr 42 over Robinson Run | 1982 | 8,156 | Poor |
| Usr 36 over Treacle Creek | 1966 | 4,977 | Poor |
| SR 161 over Little Darby Creek | 1963 | 1,461 | Poor |
| SR 37 over Bokes Creek | 1982 | 836 | Poor |
| CR 36 (BG Rd) over US 33 | 1968 | 562 | Poor |
| CR67D Streng Rd over Big Darby | 1914 | 474 | Poor |
| CR322A Sanders Rd over Rush Creek | 1970 | 407 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 33 over Ramp over C-133 | 1988 | 39,548 | Good |
| Usr 33 over Ramp over SR245 | 1988 | 27,926 | Good |
| US 33 over over SR-161 | 1967 | 23,398 | Fair |
| US 33 over over SR-161 | 1967 | 23,398 | Good |
| US 33 over over CR 114 | 1966 | 23,286 | Fair |
| US 33 over over CR 114 | 1966 | 23,286 | Fair |
| US 33 over Mill Creek | 1966 | 23,286 | Good |
| US 33 over Mill Creek | 1966 | 23,286 | Good |
| U.S.. 36 over US36 and SR 4 Ramp | 1988 | 23,040 | Good |
| Usr 33 over US36 and SR 4 Ramp | 1988 | 23,040 | 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.