Bridge conditions in Seneca County, Ohio
278 inventoried bridges · 4 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Seneca County tracks close to typical: 4 of its 278 inventoried bridges (1.4%) are rated poor, against a national rate of about 7%.
- 4 of the 278 bridges in Seneca County, Ohio, are rated in poor condition (1.4%) in the 2025 National Bridge Inventory, as of .
- 205 bridges (73.7%) are rated good and 69 (24.8%) fair.
- The median Seneca County bridge was built in 1986.
- The busiest poor-rated bridge is River Rd. over Willow Creek (built 1914), carrying about 1,701 vehicles a day.
Good 73.7% · Fair 24.8% · Poor 1.4% of 278 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 |
|---|---|---|---|
| River Rd. over Willow Creek | 1914 | 1,701 | Poor |
| Ple CR 62 over Green Creek Pl | 1978 | 831 | Poor |
| Blo Tr 77 over Honey Creek | 1943 | 155 | Poor |
| Ple Tr 143 over Sandusky River "closed" | 1914 | – | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Usr 224 over Sandusky River | 1956 | 10,539 | Good |
| SR 18 over Sandusky River | 1994 | 8,029 | Good |
| SR-53|JFK Memorial over CSX & Now RR | 1965 | 7,742 | Fair |
| SR 18D Perry St over Sandusky River | 1997 | 7,708 | Good |
| SR100 Washingtonst over Sandusky River | 1997 | 7,278 | Good |
| Hop CR 26 over Branch of Wolf Creek Ho | 1968 | 6,639 | Good |
| Hop CR 26 over Wolf Creek Branch Ho | 1994 | 6,639 | Good |
| SR 18D over over Rock Creek | 1997 | 6,367 | Good |
| SR 18 over Rock Creek | 1929 | 6,253 | Fair |
| SR 101 over Morrison Creek | 1985 | 5,869 | 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.