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Bridge conditions in Butler County, Iowa

287 inventoried bridges · 35 rated poor · 2025 National Bridge Inventory

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

Of the 287 Butler County bridges in the federal inventory, 35 carry a poor rating. That 12.2% share is roughly 2x the national average.

35 of the 287 bridges in Butler County, Iowa, are rated in poor condition (12.2%) in the 2025 National Bridge Inventory, as of August 20, 2026.
175 bridges (61.0%) are rated good and 77 (26.8%) fair.
The median Butler County bridge was built in 1997.
The busiest poor-rated bridge is Traer St over Ovrflw Shell Rock River (built 1900), carrying about 1,902 vehicles a day.

Good 61.0% · Fair 26.8% · Poor 12.2% of 287 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
Traer St over Ovrflw Shell Rock River	1900	1,902	Poor
Cherry St over Drainage	1900	1,429	Poor
C33 over Small Stream	1966	1,002	Poor
FM over Landphere Creek	1972	890	Poor
FM over West Fork Cedar River	1964	874	Poor
T64 over Small Stream	1968	776	Poor
FM over Mc Clure Creek	1970	470	Poor
FM over West Fork Cedar River	1970	373	Poor
FM over Small Stream	1970	373	Poor
FM over Small Stream	1969	373	Poor
T47 over Shell Rock River	1963	285	Poor
Local over Small Stream	1949	91	Poor
FM over West Fork Cedar River	1920	79	Poor
300 St over Small	1979	73	Poor
FM over Landphere Creek	1964	70	Poor
Local over Small Stream	1966	70	Poor
Local over Hartgrave Ck	1952	59	Poor
Local over Small Stream	1969	51	Poor
FM over Small Stream	1964	49	Poor
120TH St over Stream	1981	48	Poor
Camp Comfort over Small Stream	1936	42	Poor
Local over Small Stream	1965	41	Poor
160TH St over Stream	1990	41	Poor
Local over Small Stream	1953	35	Poor
185TH St. over Stream	1900	35	Poor
FM over Small Stream	1953	35	Poor
Kipling Ave. over Cold Water Creek	1915	30	Poor
FM over Boylan Creek	1967	29	Poor
Local over Maynes Creek	1900	26	Poor
Quail Ave over Flood Creek	1910	26	Poor
Local over Beaver Creek	1910	21	Poor
Local over Crab Apple Creek	1987	21	Poor
Local over Small Stream	1970	11	Poor
Local over Small Stream	1961	10	Poor
Blue Bird Dr. over Cold Water Creek	1905	5	Poor

Busiest bridges in the county

Bridge	Built	Vehicles/day	Condition
Ia 3 over over Ianr RR	1967	3,540	Fair
Ia 3 over Shell Rock River	1967	3,540	Fair
Cherry St over Shell Rock River	1915	3,435	Fair
Ia 57 over Drainage Ditch	1924	2,480	Fair
Ia 57 over Beaver Creek	2003	2,480	Good
Ia 57 over Phelps Creek	2017	2,400	Good
Ia 57 over Drainage Ditch	2023	2,400	Good
Ia 3 over Stream	1967	2,390	Good
Ia 14 over Phelps Creek	2011	2,300	Good
Ia 57 over Drainage Ditch	1971	2,260	Fair

Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.

Every bridge in Butler County → - all 287, 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.