Bridge conditions in Allamakee County, Iowa
197 inventoried bridges · 21 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Allamakee County has 21 bridges rated poor out of 197 inventoried, a 10.7% share that puts it well above the national rate of about 7%.
- 21 of the 197 bridges in Allamakee County, Iowa, are rated in poor condition (10.7%) in the 2025 National Bridge Inventory, as of .
- 62 bridges (31.5%) are rated good and 114 (57.9%) fair.
- The median Allamakee County bridge was built in 1975.
- The busiest poor-rated bridge is Ia 9 over Mississippi River (built 1931), carrying about 2,200 vehicles a day.
Good 31.5% · Fair 57.9% · Poor 10.7% of 197 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 |
|---|---|---|---|
| Ia 9 over Mississippi River | 1931 | 2,200 | Poor |
| FM over Branch Yellow River | 1999 | 933 | Poor |
| FM over Wexford Creek | 1970 | 530 | Poor |
| FM over Branch Yellow River | 1922 | 373 | Poor |
| Local Rd over Br Miss River | 1978 | 294 | Poor |
| FM over Clear Creek | 1962 | 200 | Poor |
| Local over Village Creek | 1966 | 157 | Poor |
| FM over Paint Creek | 1957 | 137 | Poor |
| Local over Yellow River | 1954 | 128 | Poor |
| Local over Paint Creek | 1900 | 120 | Poor |
| FM over Branch Yellow River | 1959 | 70 | Poor |
| Local Rd over Br Suttle Creek | 1900 | 70 | Poor |
| FM over Patterson Creek | 1938 | 69 | Poor |
| Local over Paint Creek | 1915 | 60 | Poor |
| Local Rd over Teeple Creek | 1900 | 60 | Poor |
| Local over Silver Creek | 1958 | 59 | Poor |
| Local over Weyford Creek | 1960 | 29 | Poor |
| Local over Yellow River | 1900 | 26 | Poor |
| Local Rd over Br Yellow River | 1941 | 11 | Poor |
| Local over Village Creek | 1900 | 10 | Poor |
| Local over Clear Creek | 1915 | 5 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ia 9 over Stream | 1967 | 3,670 | Fair |
| Ia 51 over Hecher Creek | 1967 | 2,690 | Good |
| Ia 51 over Yellow River | 1967 | 2,690 | Good |
| Front St over Clear Creek | 1985 | 2,418 | Good |
| Ia 76 over Yellow River | 1980 | 2,370 | Fair |
| Ia 76 over Drainage Ditch | 1996 | 2,370 | Good |
| Ia 9 over Mississippi River | 1931 | 2,200 | Poor |
| Ia 26 over Enterprise Creek | 1995 | 1,540 | Good |
| Ia 26 over Upper Iowa River | 1997 | 1,540 | Good |
| Ia 26 over Hayes Lake | 1998 | 1,540 | Good |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
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.