Bridge conditions in Defiance County, Ohio
159 inventoried bridges · 1 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
1 of the 159 bridges the federal inventory lists in Defiance County are rated poor; the rest split 126 good and 32 fair.
- 1 of the 159 bridges in Defiance County, Ohio, are rated in poor condition (0.6%) in the 2025 National Bridge Inventory, as of .
- 126 bridges (79.2%) are rated good and 32 (20.1%) fair.
- The median Defiance County bridge was built in 1994.
- The busiest poor-rated bridge is Scott Rd over Prairie Creek (built 1980), carrying about 306 vehicles a day.
Good 79.2% · Fair 20.1% · Poor 0.6% of 159 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 |
|---|---|---|---|
| Scott Rd over Prairie Creek | 1980 | 306 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SR15 over Maumee River | 2019 | 27,320 | Good |
| SR 15 over Norfolk & Western RR # | 1977 | 24,257 | Good |
| SR 66 over Usr 24 # | 2010 | 16,125 | Good |
| SR 15 over Auglaize River | 1991 | 13,870 | Fair |
| SR 15 over Usr 24 | 2007 | 10,150 | Good |
| SR 66 S Jefferson over Auglaize River | 1966 | 9,940 | Fair |
| SR 281 over Usr 24 | 2007 | 9,890 | Good |
| SR 15 over Tiffin River | 1965 | 9,291 | Good |
| Usr 24 over Maumee River | 2007 | 8,248 | Good |
| Usr 24 over Maumee River | 2007 | 8,248 | 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.