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Bridge conditions in Hardin County, Iowa

241 inventoried bridges · 69 rated poor · 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

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 August 20, 2026.
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.

Every bridge in Hardin County → - all 241, 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.