Bridge conditions in Iowa County, Iowa
239 inventoried bridges · 45 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
About one in 5 bridges in Iowa County is rated in poor condition: 45 of 239 on the federal inventory, one of the higher shares in Iowa.
- 45 of the 239 bridges in Iowa County, Iowa, are rated in poor condition (18.8%) in the 2025 National Bridge Inventory, as of .
- 90 bridges (37.7%) are rated good and 104 (43.5%) fair.
- The median Iowa County bridge was built in 1979.
- The busiest poor-rated bridge is M Ave over Iowa River (built 1950), carrying about 2,340 vehicles a day.
Good 37.7% · Fair 43.5% · Poor 18.8% of 239 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 |
|---|---|---|---|
| M Ave over Iowa River | 1950 | 2,340 | Poor |
| FM over English River | 1958 | 690 | Poor |
| FM over Middle Fk English River | 1970 | 450 | Poor |
| FM over Small | 1950 | 160 | Poor |
| Local over Miller Creek | 1900 | 110 | Poor |
| Local over Convey Creek | 1920 | 100 | Poor |
| Local over Price Creek | 1940 | 100 | Poor |
| FM over Iowa River | 1952 | 92 | Poor |
| FM over Small | 1979 | 90 | Poor |
| FM over North Fork Clear Creek | 1963 | 80 | Poor |
| FM over Little Bear Creek | 1970 | 80 | Poor |
| Local over Deer Creek | 1976 | 71 | Poor |
| Local over Small Stream | 1984 | 71 | Poor |
| Local over Branch Old Mans Creek | 1925 | 71 | Poor |
| Local over Branch of Clear Creek | 1978 | 71 | Poor |
| FM over Small Stream | 1930 | 60 | Poor |
| FM over Small Stream | 1959 | 60 | Poor |
| FM over English River | 1957 | 50 | Poor |
| Local over Branch Old Mans Creek | 1930 | 50 | Poor |
| FM over Small | 1952 | 45 | Poor |
| Local over Little Bear Creek | 1978 | 40 | Poor |
| FM over English River | 1950 | 35 | Poor |
| Local over Old Mans Creek | 1975 | 34 | Poor |
| Local over Miller Creek | 1930 | 30 | Poor |
| FM over Old Mans Creek | 1949 | 30 | Poor |
| Local over Small Stream | 1955 | 30 | Poor |
| Local over Stream | 1981 | 30 | Poor |
| Local over Small Stream | 1920 | 30 | Poor |
| Local over Small Stream | 1977 | 30 | Poor |
| Local over Branch Bradley Creek | 1965 | 26 | Poor |
| Local over Branch Devils Run | 1963 | 26 | Poor |
| Ff Ave over Drainage Ditch | 1971 | 26 | Poor |
| FM over Little Bear Creek | 1975 | 25 | Poor |
| FM over Stream | 1980 | 25 | Poor |
| Local over Stream | 1976 | 20 | Poor |
| Local over Drainage Ditch | 1955 | 20 | Poor |
| Local over North English River | 1929 | 20 | Poor |
| Local over Stream | 1976 | 20 | Poor |
| Poweshiek Iowa Rd over Honey Creek | 1969 | 20 | Poor |
| FM over Gritter Creek | 1970 | 15 | Poor |
| Local over Clear Creek | 1905 | 15 | Poor |
| Local over Br Middle Fork English R | 1925 | 11 | Poor |
| FM over Drainage Way | 1945 | 10 | Poor |
| Local over Small Stream | 1969 | 5 | Poor |
| FM Legno over Devils Run | 1900 | – | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-80 over Clear Creek | 1963 | 33,800 | Good |
| I 80 over Stream | 1963 | 33,000 | Fair |
| I-80 over No Name Creek | 1963 | 31,400 | Fair |
| I-80 over Stream | 1962 | 30,300 | Fair |
| I-80 over Old Mans Creek | 1962 | 30,100 | Fair |
| I-80 over Stream | 1961 | 29,700 | Good |
| EB I-80 over V 52 (h Ave) | 1963 | 14,750 | Fair |
| EB I-80 over Iowa 149 | 1963 | 14,650 | Fair |
| WB I-80 over V 52 (h Ave) | 1963 | 14,500 | Fair |
| I 80 EB over V38 | 1964 | 14,450 | Fair |
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.