Bridge conditions in Winneshiek County, Iowa
342 inventoried bridges · 57 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Winneshiek County has 57 bridges rated poor out of 342 inventoried, a 16.7% share that puts it well above the national rate of about 7%.
- 57 of the 342 bridges in Winneshiek County, Iowa, are rated in poor condition (16.7%) in the 2025 National Bridge Inventory, as of .
- 130 bridges (38.0%) are rated good and 155 (45.3%) fair.
- The median Winneshiek County bridge was built in 1975.
- The busiest poor-rated bridge is FM over Trout River (built 1956), carrying about 953 vehicles a day.
Good 38.0% · Fair 45.3% · Poor 16.7% of 342 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.
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ia 9 over Trout Creek | 1969 | 14,900 | Fair |
| Ia 9 over Division St | 1969 | 8,900 | Fair |
| College Dr over Upper Iowa River | 1987 | 8,868 | Fair |
| Ia 9 over Trout Creek | 1969 | 5,400 | Fair |
| US 52 over Dry Run | 1963 | 4,230 | Fair |
| US 52 over Stream & Twin Springs Rd | 1963 | 4,230 | Fair |
| Ia 9 over Dry Run Creek | 1945 | 3,880 | Fair |
| US 52 over Upper Iowa River | 1963 | 3,340 | Fair |
| Ia 24 over Turkey River Overflow | 2006 | 2,970 | Good |
| Ia 24 over Stream | 2008 | 2,970 | Good |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
Every bridge in Winneshiek County → - all 342, busiest first, each with its own condition record.
All of Iowa: Iowa 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.