Bridge conditions in Carroll County, Iowa
249 inventoried bridges · 17 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
17 of the 249 bridges the federal inventory lists in Carroll County are rated poor; the rest split 120 good and 112 fair.
- 17 of the 249 bridges in Carroll County, Iowa, are rated in poor condition (6.8%) in the 2025 National Bridge Inventory, as of .
- 120 bridges (48.2%) are rated good and 112 (45.0%) fair.
- The median Carroll County bridge was built in 1981.
- The busiest poor-rated bridge is FM over Brushy Fork Creek (built 1964), carrying about 650 vehicles a day.
Good 48.2% · Fair 45.0% · Poor 6.8% of 249 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 |
|---|---|---|---|
| FM over Brushy Fork Creek | 1964 | 650 | Poor |
| East St over Willow Creek | 1964 | 580 | Poor |
| FM over Creek | 1939 | 399 | Poor |
| Local over Stream | 1970 | 120 | Poor |
| Local over Brushy Fork Creek | 1925 | 60 | Poor |
| E35 (200TH St) over Field Stream | 1946 | 60 | Poor |
| Local over Willow Creek | 1900 | 40 | Poor |
| Local over Middle Racoon River | 1900 | 34 | Poor |
| Local over Field Stream | 1957 | 29 | Poor |
| Local over Field Stream | 1913 | 26 | Poor |
| Local over Brushy Fork Creek | 1974 | 20 | Poor |
| Local over Middle Raccoon River | 1914 | 15 | Poor |
| Local over Small | 1979 | 11 | Poor |
| Local over Middle Raccoon River | 1951 | 11 | Poor |
| Local over Field Stream | 1962 | 11 | Poor |
| Local (dead End over Field Stream | 1900 | 11 | Poor |
| Local over Buck Run | 1990 | 11 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 30 over Ditch #77 | 1919 | 13,000 | Fair |
| US 30 over Storm Creek | 1955 | 7,300 | Fair |
| US 30 over over UP RR | 1982 | 6,800 | Fair |
| US 30 over Middle Raccoon River | 1982 | 6,000 | Fair |
| US 71 over UP RR & Rd | 1988 | 5,600 | Fair |
| US 71 over Stream | 2000 | 5,600 | Good |
| US 71 over Middle Raccoon River | 1985 | 5,100 | Good |
| US 71 over Storm Creek | 1973 | 4,090 | Good |
| Grant Rd over Middle Raccoon River | 1986 | 3,914 | Good |
| US 30 over East Boyer River | 1997 | 3,670 | 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.