Bridge conditions in Hardin County, Iowa
241 inventoried bridges · 69 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Of the 241 Hardin County bridges in the federal inventory, 69 carry a poor rating. That 28.6% share is roughly 4x the national average.
- 69 of the 241 bridges in Hardin County, Iowa, are rated in poor condition (28.6%) in the 2025 National Bridge Inventory, as of .
- 87 bridges (36.1%) are rated good and 85 (35.3%) fair.
- The median Hardin County bridge was built in 1987.
- The busiest poor-rated bridge is South Ave over Iowa River (built 1957), carrying about 1,041 vehicles a day.
Good 36.1% · Fair 35.3% · Poor 28.6% of 241 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 |
|---|---|---|---|
| South Ave over Iowa River | 1957 | 1,041 | Poor |
| Hwy 215 over Small Natural Stream | 1947 | 854 | Poor |
| Hwy 215 over Small Natural Stream | 1948 | 854 | Poor |
| FM over Dd | 1971 | 776 | Poor |
| FM over Tipton CR | 1974 | 687 | Poor |
| FM over Minerva Creek | 1972 | 550 | Poor |
| FM over Elk Creek | 1964 | 491 | Poor |
| FM over Creek | 1960 | 462 | Poor |
| FM over Honey Creek | 1967 | 373 | Poor |
| FM over Creek | 1900 | 373 | Poor |
| FM over South Fork Iowa River | 1964 | 373 | Poor |
| FM over Beaver Creek | 1967 | 334 | Poor |
| FM over Tipton Creek | 1900 | 334 | Poor |
| Local over Creek | 1972 | 275 | Poor |
| FM over Creek | 1942 | 255 | Poor |
| Co. Rd. D-35 over Beaver Creek | 1960 | 250 | Poor |
| FM over Creek | 1970 | 177 | Poor |
| FM over Creek | 1973 | 108 | Poor |
| Local over Creek | 1978 | 91 | Poor |
| Local over Honey Creek | 1984 | 73 | Poor |
| FM over Creek | 1977 | 73 | Poor |
| Local over Drainage Ditch | 1978 | 73 | Poor |
| Local over Creek | 1960 | 69 | Poor |
| Local over Iowa River (south Fork) | 1997 | 62 | Poor |
| Local over Creek | 1990 | 62 | Poor |
| FM over Honey Creek | 1985 | 59 | Poor |
| Local over Tipton Creek | 1983 | 51 | Poor |
| Local over Beaver Creek | 1987 | 51 | Poor |
| Local over South Fork Iowa River | 1982 | 51 | Poor |
| FM over Bear Creek | 1996 | 44 | Poor |
| FM over South Fork Iowa River | 1954 | 44 | Poor |
| FM over South Fork Iowa River | 1900 | 44 | Poor |
| Local over Creek | 1983 | 41 | Poor |
| Local over Dd | 1925 | 41 | Poor |
| Local over Dd | 1900 | 41 | Poor |
| FM over Creek | 1988 | 39 | Poor |
| Local over Beaver Creek | 1984 | 39 | Poor |
| Local over South Fork Iowa River | 1939 | 39 | Poor |
| Local over Tipton Creek | 1989 | 35 | Poor |
| FM over Creek | 1960 | 34 | Poor |
| Local over Minerva Creek | 1984 | 30 | Poor |
| Local over Tipton Creek | 1984 | 30 | Poor |
| Local over Honey Creek | 1988 | 30 | Poor |
| Local over Honey Creek | 1982 | 29 | Poor |
| Local over Beaver Creek | 1985 | 29 | Poor |
| Local over Iowa River (south Fork) | 1956 | 29 | Poor |
| Local over South Fork | 1919 | 29 | Poor |
| Local over Creek | 1986 | 26 | Poor |
| Local over Honey Creek | 1986 | 26 | Poor |
| Local over Tilton Creek | 1981 | 26 | Poor |
| Local over Drainage | 1976 | 26 | Poor |
| FM over Dd | 1963 | 25 | Poor |
| Local over Honey Creek | 1953 | 21 | Poor |
| Local over Honey Creek | 1980 | 21 | Poor |
| Local over Creek | 1991 | 21 | Poor |
| Local over Small Stream | 1987 | 20 | Poor |
| Local over Tipton Creek | 1900 | 20 | Poor |
| Local over Tipton Creek | 1985 | 20 | Poor |
| Local over Stream | 1981 | 16 | Poor |
| Local over Honey Creek | 1919 | 16 | Poor |
| Local over Creek | 1977 | 16 | Poor |
| Local over Creek | 1989 | 16 | Poor |
| Local over Honey Creek | 1963 | 16 | Poor |
| Local over Tipton Creek | 1987 | 16 | Poor |
| Local over Beaver Creek | 1958 | 15 | Poor |
| FM over Beaver Creek | 1982 | 15 | Poor |
| Local over Creek | 1978 | 15 | Poor |
| Local over Ia River | 1965 | 11 | Poor |
| FM over Creek | 1985 | 5 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 20 over Drainage | 2003 | 9,800 | Good |
| US 20 over Drainage | 2003 | 9,200 | Good |
| US 20 over Iowa River | 2003 | 9,200 | Good |
| US 65 over Iowa River | 2011 | 7,800 | Good |
| Washington St over Iowa River | 1934 | 6,251 | Fair |
| US 65 over Beaver Creek | 1976 | 5,300 | Good |
| US 20 EB over D 35 (elm St) | 2003 | 4,900 | Fair |
| US 20 WB over D 35 (elm St) | 2003 | 4,900 | Good |
| US 20 EB over Beaver Creek | 2003 | 4,850 | Good |
| US 20 WB over Beaver Creek | 2003 | 4,850 | 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.