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Every bridge in Harrison County, Iowa

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

222 inventoried bridges, busiest first

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

Harrison County, Iowa, has 222 bridges in the 2025 National Bridge Inventory: 61 rated good, 120 fair, and 41 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
US 30 over UPRR	1998	10,300	Good
US 30 over Willow Creek	1972	10,300	Fair
NB I-29 over Boyer River	1958	10,050	Fair
SB I-29 over Boyer River	1958	10,050	Fair
NB I-29 over Allen Creek	1967	7,750	Fair
SB I-29 over Allen Creek	1967	7,750	Fair
SB I-29 over over UP RR	1967	7,750	Fair
NB I-29 over Burcham Creek	1967	7,600	Fair
NB I-29 over Burcham Creek	1967	7,600	Fair
NB I-29 over Old Soldier River Ditch	1967	7,600	Fair
NB I-29 over UP RR & K-45	1967	7,600	Fair
SB I-29 over Burcham Creek	1967	7,600	Fair
SB I-29 over Burcham Creek	1967	7,600	Fair
SB I-29 over Old Soldier River Ditch	1967	7,600	Fair
SB I-29 over UP RR & K-45	1967	7,600	Fair
I 29 NB over US 30	1967	7,500	Fair
NB I-29 over Drainage Ditch	1967	7,300	Fair
NB I-29 over Soldier River	1967	7,300	Fair
SB I-29 over Drainage Ditch	1967	7,300	Fair
SB I-29 over Soldier River	1967	7,300	Fair
NB I-29 over Drainage Ditch	1966	7,250	Fair
NB I-29 over Little Sioux River	1967	7,250	Fair
SB I-29 over Drainage Ditch	1966	7,250	Fair
SB I-29 over Little Sioux River	1967	7,250	Fair
NB I-29 over over UP RR	1967	7,000	Good
US 30 over Hog Creek	1983	6,800	Fair
US 30 over Stream	1919	6,800	Fair
US 30 over Allen Creek	1929	6,500	Fair
SB I-29 over US 30	1967	6,450	Fair
US 30 over Boyer Rvr & Cc RR & Road	1973	5,900	Fair
US 30 over Natural Creek	1929	4,790	Good
US 30 over Old Channel Boyer River	1983	4,490	Good
US 30 over Six Mile Creek	1988	4,490	Fair
US 30 over Stream	1919	4,490	Fair
US 30 over Boyer River	2016	4,430	Good
US 30 over Missouri River	1991	4,410	Fair
US 30 over Wilson Ditch	2023	4,410	Good
US 30 over Youngs Ditch	1953	4,410	Fair
US 30 over Boyer River	1968	3,090	Fair
US 30 over Drainage Ditch	1983	3,090	Fair
US 30 over Mill Creek	2019	3,090	Good
US 30 over Powley Drain Ditch	1983	3,090	Fair
US 30 over Stream	2023	3,090	Good
US 30 over Stream	2012	3,090	Fair
US 30 over Stream	1924	3,090	Good
Ia 191 over Spring Creek	2014	1,650	Good
L20 Loess Hills over Small Natural Stream	1926	1,534	Fair
L20 Loess Hills over Small Natural Stream	1927	1,451	Fair
L20 Loess Hills over Willow Creek	1993	1,414	Good
Ia 37 over Boyer River	1958	1,340	Fair
Ia 127 over Willow Creek	1991	1,230	Fair
Bus Brown Dr over Drainage	2017	1,225	Good
Bus Brown Dr over Unnamed Creek	2015	1,225	Fair
Ia 127 over Spooner Ditch	1990	1,180	Good
L20 Loess Hills over Boyer River	1991	1,065	Fair
L20 Loess Hills over Drainage Ditch	1976	1,065	Fair
L20 Loess Hills over Drainage Ditch	1991	1,065	Good
Ia 127 & 183 over Steer Creek	1968	920	Fair
Ia 183 over Ditch	2002	870	Good
Ia 183 over Natural Creek	1996	870	Good
Huron St over Willow River	1996	810	Fair
Ia 44 over Branch Six Mile Creek	1978	800	Fair
Ia 44 over Branch Six Mile Creek	1978	800	Fair
Ia 44 over Branch Six Mile Creek	1978	800	Good
Ia 44 over Pigeon Creek	1978	800	Good
Ia 44 over Six Mile Creek	1978	800	Fair
Ia 44 over Spring Creek	1978	800	Fair
FM 335TH St over Boyer River	1959	788	Fair
FM Overton Ave over Harris Grove Creek	1963	788	Fair
L20 Loess Hills over Allen Creek	1990	767	Good
L20 Loess Hills over Bellville Ditch	1926	767	Fair
L20 Loess Hills over Natural Creek	1926	767	Fair
Ia 183 over Cobb Creek	2017	730	Good
Ia 127 over I-29	1967	700	Fair
F 50 over I-29	1967	608	Fair
Ia 183 over Drainage Ditch	2008	580	Good
Ia 183 over Soldier River	2014	580	Good
296TH St over Boyer River	1974	577	Fair
Austin Ave over Old Soldier Ditch	1984	568	Fair
FM & 194TH St over S Picayune Creek	1979	518	Fair
Fm/austin Ave over Soldier River	1957	497	Fair
Ia 127 over Allen Creek	1968	460	Good
Ia 127 over Little Bloomer Creek	1940	460	Fair
F20L Easton Trail over Willow Creek	2020	437	Fair
260TH St over Hog Creek	1950	417	Fair
260TH St over Willow Creek	1966	417	Fair
FM & Austin Ave over Little Sioux River	1987	396	Good
FM & Austin Ave over Monona-harrison Ditch	2004	396	Good
F50 270TH St over Allen Creek	2021	379	Good
FM & 296TH St over Harris Grove Creek	1900	379	Fair
FM 270TH St over Willow Creek	1990	379	Fair
Easton Trail over Elk Creek	2008	335	Good
FM Easton Trail over Allen Creek	1969	335	Poor
SR F20 over I-29	1966	319	Fair
Jackson St over Soldier River	2004	313	Good
296TH St over Potato Creek	2007	270	Good
FM 296TH St over Pigeon Creek	1962	270	Fair
Loc Munice Ave over Small Creek	1956	240	Fair
FM 110 St over Boyer River	1984	199	Fair
305TH St over Allen Creek	1974	139	Fair
FM Laredo Ave over Allen Creek	1942	139	Poor
FM Toledo Ave over Mill Creek	1977	139	Fair
L23 Laredo Ave over Steer Creek	1942	139	Poor
Local Rd over I-29	1966	139	Good
Racine Trail over Small Stream	2009	139	Good
8TH Street over Boyer River	1900	123	Poor
F58 296TH St over Mosquito Creek	2016	121	Good
FM - 335TH St over Mosquito Creek	1920	120	Poor
FM Tabor Ave over Small Stream	1956	110	Poor
FM & 194TH St over Willow River	1968	100	Fair
FM & Panora Ave over Willow River	1972	100	Fair
Fm-335th St over Potato Creek	1993	100	Good
Loc Canal St over Willow River	1916	100	Poor
Loc 128 Trail over Boyer River	1940	89	Poor
Medford Ave over Willow River	1900	89	Poor
180TH St over Picayune Creek	1981	79	Good
180TH Street over Boyer River	2002	79	Good
198TH St over Small Creek	1950	79	Poor
235TH St over I-29	1967	79	Good
FM & 155TH St over Mud Creek	1940	79	Poor
Fm-335th St over Pigeon Creek	1991	79	Good
242 Trail over Hog Creek	1900	71	Fair
FM & Racine Trl over Small Creek	1947	71	Fair
FM - 335TH St over Small Creek	1952	71	Poor
Laredo Ave over Stowe Creek	2022	71	Good
Loc Sawyer Tr over Picayune Creek	1977	71	Fair
242 Trail over Willow Creek	1986	60	Good
280TH St over Willow River	2021	60	Good
E Kelly Ave over Soldier River	2013	60	Good
FM & Toledo Ave over Picayune Creek	1977	60	Fair
FM Gordon Ave over Soldier River	1974	60	Fair
Fm-toledo Ave over East Picayune Creek	1977	60	Good
Seward Ave over Pigeon Creek	1979	60	Fair
Vienna Ave over Pigeon Creek	1967	60	Poor
Waldorf Avenue over Creek	1950	60	Fair
FM & 340TH St over Willow River	2005	50	Good
FM - 335TH St over Keg Creek	1955	50	Fair
FM Geneva Place over Soldier River	1980	50	Good
Jasper Trail over Small Creek	1900	50	Poor
106TH Trail over I-29	1966	45	Good
280TH Street over Allen Creek	2020	45	Good
Local Taylor Av over Small Creek	1955	45	Poor
Neely Trail over Willow Creek	1940	45	Poor
Redwood Ave over Six Mile Creek	1992	45	Fair
Spencer Ave over Pigeon Creek	2008	45	Good
Spokane Ave over Mill Creek	2003	45	Good
155TH St over Boyer River	2018	40	Good
FM & Quay Ave over Small Stream	1948	40	Fair
FM - 335TH St over Small Stream	1952	40	Fair
Hillside Ave over Steer Creek	1963	40	Fair
Local 120TH St over Little Sioux River	1971	40	Poor
Malden Trail over Allen Creek	1940	40	Fair
Parker Trail over Boyer River	2023	40	Good
Taylor Ave over Pigeon Creek	1920	40	Poor
160TH St over I-29	1967	34	Good
192 St over I-29	1967	34	Fair
242ND Trail over Drainage Ditch	2013	34	Poor
288TH St over Mosquito Creek	1940	34	Poor
F32 194TH St over Allen Creek	2023	34	Good
FM - 305TH St over Mosquito Creek	1978	34	Fair
Harvard Trail over Allen Creek	2008	34	Good
Toledo Ave over Pigeon Creek	1951	34	Poor
210TH Trail over Spooner Ditch	1959	29	Fair
235TH Trail over Willow Creek	2006	29	Good
330TH St over Potato Creek	1980	29	Fair
FM & 110TH St over Willow River	1918	29	Fair
Fm/canton Ave over Soldier River	1974	29	Good
Kendrick Ave over Allen Creek	2010	29	Fair
Loc 180TH St over S Picayune Creek	2009	29	Fair
Loc Tracey Ave over N Picayune Creek	2003	29	Fair
Local Vienna Av over Spring Creek	1960	29	Fair
Mobile Ave over Hoffman Creek	1940	29	Poor
Niles Trail over Harris Grove Creek	1975	29	Fair
Parker Trail over Small Creek	1916	29	Poor
Yale Ave over Keg Creek	1940	29	Fair
280TH Street over I-29	1967	26	Fair
FM & 220TH St over Pigeon Creek	1952	26	Fair
FM 110TH St over Straw Creek	1900	26	Fair
Loc 215TH St over Pigeon Creek	1955	26	Poor
Loc Vienna Ave over Picayune Creek	2006	26	Good
Ruby Trail over Six Mile Creek	1945	26	Fair
235TH St over Allen Creek	2015	25	Fair
270TH St over Spring Creek	1951	20	Fair
280TH St over Mosquito Creek	1940	20	Poor
305TH St over Keg Creek	1957	20	Poor
315TH St over Keg Creek	1999	20	Good
315TH St over Mosquito Creek	1930	20	Poor
FM & 270TH St over Pigeon Creek	1951	20	Fair
FM & Nash Trail over Allen Creek	1976	20	Poor
Loc 335TH St over Allen Creek	1959	20	Poor
Yates Ave over Small Stream	1960	20	Fair
140TH St over Allen Creek	1973	15	Fair
180TH St over Willow Creek	1975	15	Poor
235TH St over Spooner Ditch	1962	15	Fair
240TH Street over Pigeon Creek	1967	15	Poor
288TH Street over Patato Creek	1995	15	Fair
FM & 170TH St over E.picayune Creek	1978	15	Fair
FM 130TH St over Allen Creek	1950	15	Fair
Madrid Ave over Stowe Creek	2023	15	Good
Quincy Trail over Boyer River	1994	15	Good
155TH St over Willow River	1930	11	Poor
170TH Lane over Allen Creek	1969	11	Fair
220TH St over Allen Creek	1940	11	Fair
220TH St over Spooner Ditch	1970	11	Fair
250TH St over Allen Creek	1965	11	Poor
325TH St over Keg Creek	1900	11	Poor
325TH St over Pigeon Creek	1960	11	Poor
Loc 210TH St over Little Pigeon	1930	11	Poor
Loc-spokane Ave over Picayune Creek	1979	11	Fair
Mobile Ave over Allen Creek	1957	11	Poor
Quebec Place over Willow River	1975	11	Fair
Reno Ave over Six Mile Creek	1930	11	Poor
184TH Lane over Steer Creek	1969	10	Fair
193RD Lane over Steer Creek	1971	10	Fair
125TH St over Small Stream	1960	5	Poor
185TH Lane over Allen Creek	1986	5	Poor
FM Newark Ave over Allen Creek	1960	5	Fair
Kendall Trail over Steer Creek	1969	5	Poor
Loc Tama Trail over S Picayune Creek	1998	5	Good
Norwood Ave over Honey Creek	1900	5	Fair
Osage Trail over Willow River	1977	5	Fair
Tama Trail over S Picayune Creek	2023	5	Good

Source: FHWA National Bridge Inventory, 2025.

Harrison County bridge conditions · Iowa bridges by county.

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