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Every bridge in Hamilton County, Iowa

Name: Every bridge in Hamilton County, Iowa
Creator: Bridge Report Card
License: https://creativecommons.org/publicdomain/zero/1.0/

165 inventoried bridges, busiest first

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

Hamilton County, Iowa, has 165 bridges in the 2025 National Bridge Inventory: 61 rated good, 72 fair, and 32 poor (as of August 20, 2026).
This index lists every one of them, busiest first; each links to its own condition record.

Bridge	Built	Vehicles/day	Condition
I 35 over Drainage Ditch	1966	27,200	Fair
I 35 over Stream	1965	26,900	Good
I-35 over Tuttle Creek	1967	17,400	Fair
I-35 over Drainage Ditch 23 & 31	1972	16,600	Good
I 35 NB over Ia 175	1966	11,850	Fair
I 35 SB over Ia 175	1966	11,850	Fair
US 20 & Ia 17 over Waterway	1977	11,200	Fair
US 20 over Drainage Ditch #4	1968	9,600	Good
US 20 over Drainage Ditch #4	1968	9,600	Fair
US 20 over Drainage Ditch #4	1968	9,600	Good
US 20 over Tuttle D.D.#4	1968	9,400	Good
NB I-35 over Cc RR & 210TH St	1972	8,800	Good
SB I-35 over Cc RR & 210TH St	1972	8,500	Fair
I 35 NB over Stream	1972	8,300	Fair
NB I-35 over Co Rd D-25	1974	8,250	Fair
SB I-35 over Stream	1972	8,200	Fair
I 35 SB over SR D25	1974	7,950	Fair
Ia 17 over US 20	1974	6,170	Good
Superior St over Brewers Creek	1923	5,839	Fair
EB 20 & SB 17 over R-27	1978	5,500	Fair
WB 20 & NB 17 over R-27	1978	5,500	Good
EB US 20 over Boone River	1974	5,050	Fair
WB US 20 over Boone River/rec Trail	1974	5,050	Fair
EB US 20 over R-38	1975	4,950	Fair
WB US 20 over R-38	1975	4,950	Fair
EB US 20 over I-35	1968	4,700	Fair
2ND St over Boone River	1950	3,797	Fair
Ia 17 over Boone River	1972	3,460	Fair
Overpass Dr over Cc RR	1931	3,353	Fair
WB US 20 over I-35	1968	3,350	Fair
Des Moines St over Brewer Creek	1989	3,175	Fair
220TH St over Drainage Ditch	2010	2,892	Good
2ND St over Lyon Creek	1978	2,735	Fair
Ia 17 over Ioway Creek	1979	2,380	Fair
Ia 175 over Long Dick Creek	1937	2,180	Fair
Ia 175 over Drainage Ditch	1977	2,100	Fair
Ia 175 over UP RR	1979	2,100	Good
Ia 175 over S Skunk River	1979	1,920	Fair
Beach St over Brewers Creek	1995	1,745	Good
Dubuque St over Boone River	1954	1,695	Fair
US 69 over Drainage Ditch	2009	1,620	Fair
White Fox Rd over Boone River	1982	1,282	Good
US 69 over US 20	1968	1,230	Good
US 69 over Cc RR	1973	1,160	Fair
SR D-65 over I-35	1965	1,117	Fair
Ia 175 over Ioway Creek	1972	1,090	Fair
Des Moines St over Boone River	1954	1,065	Fair
SR D-20 over I-35	1972	828	Fair
380TH St over Long Dick Creek	2000	797	Good
FM over Skunk River	1974	698	Poor
Ia 17 over US 20	1978	650	Good
FM over Keigley Creek	1999	589	Good
Vail Ave over over Cc RR	1932	578	Poor
FM over Ioway Creek	1982	559	Fair
FM over Long Dick Creek	1997	559	Good
FM over Long Dick Creek	1997	559	Good
FM over Boone River	2009	509	Good
FM over Drainage Ditch	1976	509	Fair
FM over Boone River	1964	499	Fair
Park Ave over Lyons Creek	1947	490	Poor
FM over Boone River	1939	478	Fair
Fas 3556 over Creek	1947	478	Poor
FM over Skunk River	1992	459	Poor
FM over Boone River	1973	429	Fair
SR D-41 over I-35	1966	399	Good
E. Ohio St over Brewer Creek	1996	393	Good
Local over Drainage Ditch	2006	379	Good
Willson Ave over Brewer Creek	1920	377	Fair
FM over White Fox Creek	1960	330	Fair
FM over Drainage Ditch	1960	319	Poor
FM Rd R 77 over US 20	1990	290	Good
FM over Skunk River	1962	270	Fair
Kantor Ave over Lyons Creek	2003	270	Fair
FM over Drainage Ditch	2005	265	Good
FM over Drainage Ditch	2004	249	Good
FM over Buck Creek	1975	240	Fair
FM over Creek	1957	240	Poor
D41 280TH St over Creek	2015	234	Good
FM over Buck Creek	1975	199	Fair
Co Rd R 61 over U.S. 20	1990	159	Good
Columbia St over Lyons Creek	1982	141	Good
FM over Brewers Creek	1978	131	Fair
Local over Creek	1918	131	Poor
Local over Skunk River	1952	100	Fair
SR D-47 over I-35	1966	100	Fair
Local over Skunk River	1952	90	Fair
280TH St over Boone River	2019	80	Good
360TH St over Skunk River	2013	80	Good
Local Rd over I-35	1965	71	Good
Local over Buck Creek	1994	71	Fair
Local over Creek	2006	71	Good
Local over Ioway Creek	1991	71	Good
SR 350TH Street over I-35	1966	71	Fair
280TH St over Boone River	1902	62	Poor
FM over Boone River	1955	60	Poor
Local over Boone River	1954	60	Poor
Tollman Ave over US 20	1967	60	Good
Ziegler Ave over Bear CR	2012	60	Good
240TH St over Drainage Ditch	2011	50	Good
FM over Drainage Ditch	1924	50	Fair
Local over Keigley Creek	1994	50	Good
Local over Ioway Creek	1917	45	Poor
Lockwood Ave over US 20	1975	45	Good
SR D-36 over I-35	1967	45	Good
Tollman Ave over Drainage Ditch	2012	45	Good
203RD St over Lyon Creek	2019	40	Good
Inkpaduta Ave over Boone River	1907	40	Poor
Local over White Fox CR	1955	40	Fair
260TH St over Drainage Ditch	2017	34	Good
280TH St over Skunk River	2020	34	Good
FM over Drainage Ditch	1920	34	Poor
Local over Brewers Creek	1971	34	Fair
Local over White Fox Creek	1994	34	Good
Mcmurray Ave over Keigley Branch	2017	34	Good
160TH St over Drainage Ditch	2010	30	Good
175TH St over Buck Creek	2000	30	Good
FM over Long Dick Creek	1924	30	Poor
Local over Drainage Ditch	1923	30	Poor
Local over Drainage Ditch	1919	30	Poor
Local over Skunk River	1993	30	Good
Local over White Fox CR	1978	30	Fair
Xircus Ave over Long Dick Creek	2022	30	Good
FM over Drainage Ditch	1923	26	Poor
FM over Keigley Creek	1949	26	Poor
FM over Skunk River	1955	26	Fair
Local over Boone River	1924	26	Poor
Local over Buck CR	2008	26	Good
Local over Drainage Ditch	1924	26	Fair
Local over Drainage Ditch	1970	26	Fair
Local over Drainage Ditch	1970	26	Fair
Local over Long Dick CR	1955	26	Fair
Local over Prairie CR	2006	26	Good
Local over White Fox Creek	1989	26	Good
Poplar Grove Ave over US 20	1975	26	Good
370TH St over Drainage Ditch	2017	20	Good
390TH St over Drainage Ditch	2004	20	Good
FM over Ioway Creek	1924	20	Fair
Local over Creek	1926	20	Poor
Local over Drainage Ditch	1971	20	Fair
Local over Keigley Creek	1955	20	Fair
Local over Long Dick CR	1924	20	Poor
Local over Long Dick CR	1916	20	Poor
Local over Prairie CR	2008	20	Good
Local over Skunk River	1955	20	Fair
Ziegler Ave over US 20	1990	20	Good
FM over Drainage Ditch	1949	15	Poor
Local over Bear CR	1918	15	Poor
Local over Brewers CR	1926	15	Poor
Local over Crooked Creek	1970	15	Fair
Local over Drainage Ditch	1922	15	Poor
Local over Drainage Ditch	1975	15	Poor
Local over Ioway Creek	1952	15	Poor
Local over Keigley CR	1977	15	Fair
Local over Keigley CR	1954	15	Fair
Local over Long Dick CR	1955	15	Fair
Local over Skunk River	1949	15	Fair
170TH St over Drainage Ditch	2012	11	Good
FM over Drainage Ditch	1923	11	Poor
Local over Creek	1918	11	Fair
Local over Drainage Ditch	2011	11	Good
Local over Drainage Ditch	2005	11	Good
Local over Drainage Ditch	1929	11	Fair
Local over Ioway Creek	1988	11	Good
Local over Drainage Ditch	1925	5	Poor
Local Legno over Stream	1920	–	Poor

Source: FHWA National Bridge Inventory, 2025.

Hamilton County bridge conditions · Iowa bridges by county.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.