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Bridge conditions in Adams County, Iowa

185 inventoried bridges · 85 rated poor · 2025 National Bridge Inventory

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

About one in 2 bridges in Adams County is rated in poor condition: 85 of 185 on the federal inventory, one of the higher shares in Iowa.

85 of the 185 bridges in Adams County, Iowa, are rated in poor condition (45.9%) in the 2025 National Bridge Inventory, as of August 20, 2026.
23 bridges (12.4%) are rated good and 77 (41.6%) fair.
The median Adams County bridge was built in 1966.
The busiest poor-rated bridge is 2ND Street over Dreys Ditch (built 1920), carrying about 787 vehicles a day.

Good 12.4% · Fair 41.6% · Poor 45.9% of 185 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
2ND Street over Dreys Ditch	1920	787	Poor
6TH Street over Stream	1970	453	Poor
Fm-150th Street over East Nodaway River	1955	399	Poor
190TH Street over Brown Branch	1965	349	Poor
B Street over Middle Nodaway River	1968	255	Poor
Fm-175th Street over Show Creek	1961	199	Poor
Corning-carl Rd over Kemp Creek	1961	199	Poor
Fm-chestnut Ave over Williams Creek	1959	190	Poor
Fm-chestnut Ave over Petersons Creek	1959	190	Poor
Fm-210th Street over Kemp Creek	1988	180	Poor
150TH Street over Kemp Creek	1961	180	Poor
4TH Street over Stream	1925	120	Poor
250TH Street over West Fork 102 River	1969	110	Poor
Fm-110th Street over Shanghai Creek	1940	91	Poor
270TH Street over Rose Branch	1976	79	Poor
240TH Street over Stream	1979	79	Poor
N77 Union Ave over Cipra Branch	1900	71	Poor
Walnut Avenue over Stream	1967	71	Poor
Fm-uban Avenue over East Nodaway River	1954	60	Poor
Poplar Avenue over Lonzo Creek	1957	50	Poor
Notchwood Ave over Stream	1956	40	Poor
205TH Street over Stream	1966	40	Poor
Xavier Avenue over E. Fork E Nodaway River	1974	40	Poor
Mulberry Avenue over Stream	1968	40	Poor
240TH Street over Platte River	1958	34	Poor
240TH Street over West Fork 102 River	1974	34	Poor
Kentucky Avenue over West Fork 102 River	1967	34	Poor
190TH Street over East Nodaway River	1977	34	Poor
220TH Street over East Nodaway River	1930	33	Poor
110TH Street over Middle Nodaway River	1920	30	Poor
110TH Street over Stream	1955	30	Poor
Fm-110th Street over Williams Creek	1979	30	Poor
Fig Avenue over Kemp Creek	1927	29	Poor
Poplar Avenue over Stream	1983	29	Poor
Union Avenue over Saylings Creek	1965	26	Poor
240TH Street over Saylings Creek	1958	26	Poor
240TH Street over Saylings Creek	1978	26	Poor
Union Avenue over Stream	1966	26	Poor
Notchwood Ave over W Branch 102 River	1971	26	Poor
Orange Avenue over Lonzo Creek	1968	26	Poor
235TH Street over Kemp Creek	1940	26	Poor
Chestnut Avenue over East Nodaway River	1930	26	Poor
Tulip Avenue over East Nodaway River	1976	26	Poor
120TH Street over East Nodaway River	1955	26	Poor
Quince Ave over Stream	1978	20	Poor
220TH Street over Kemp Creek	1910	20	Poor
240 Th Street over Stream	1971	20	Poor
170TH Street over Mt. Zion Branch	1965	20	Poor
190TH Street over Stream	1968	20	Poor
Uban Avenue over Stream	1950	20	Poor
130TH Street over Kosar Branch	1960	20	Poor
Notchwood Ave over Kemp Creek	1960	20	Poor
Fm-110th Street over Williams Creek	1964	20	Poor
Nodaway Rvr Rd over East Nodaway River	1930	20	Poor
Union Avenue over Stream	1972	15	Poor
Ironwood Avenue over Stream	1979	15	Poor
Walnut Avenue over Cipra Branch	1955	15	Poor
Redwood Avenue over Stream	1968	15	Poor
200TH Street over Stream	1958	15	Poor
Poplar Avenue over Willow Creek	1981	11	Poor
Filbert Avenue over West Fork 102 River	1972	11	Poor
275TH Street over Long Branch	1958	11	Poor
210TH Street over Stream	1957	11	Poor
210TH Street over Metz Creek	1965	11	Poor
210TH Street over West Platte River	1966	11	Poor
210TH Street over Stream	1966	11	Poor
Adair-adams St over East Nodaway River	1960	11	Poor
140TH Street over East Nodaway River	1900	11	Poor
Holly Avenue over West Fork 102 River	1958	5	Poor
Filbert Avenue over West Fork 102 River	1984	5	Poor
Apple Avenue over Stream	1964	5	Poor
270TH Street over Long Branch	1960	5	Poor
Willow Avenue over Stream	1968	5	Poor
Mulberry Ave over Stream	1962	5	Poor
Mulberry Ave over East Nodaway River	1900	5	Poor
198TH Lane over Kemp Creek	1900	5	Poor
Chestnut Avenue over Middle Nodaway River	1930	5	Poor
190TH Street over Stream	1965	5	Poor
Adams-adair St over Stream	1960	5	Poor
Grove Avenue over Williams Creek	1970	5	Poor
Birch Avenue over Williams Creek	1963	5	Poor
Dogwood Avenue over Williams Creek	1964	5	Poor
Elm Avenue over Williams Creek	1968	5	Poor
Birch Avenue over Sin Creek	1964	5	Poor
Adams-montgom. over Sin Creek	1979	5	Poor

Busiest bridges in the county

Bridge	Built	Vehicles/day	Condition
Ia 148 over East Nodaway River	1976	3,580	Fair
Ia 148 over over BNSF RR	1976	3,580	Good
US 34 over E Nodaway River & BNSF R	1964	2,970	Fair
US 34 over Metz Creek	1921	2,390	Fair
US 34 over Platte River	2014	2,390	Good
US 34 over Kemp Creek	1964	2,240	Fair
Sycamore Avenue over Saylings Creek	1967	1,404	Fair
Sycamore Avenue over Stream	1967	1,404	Fair
Ia 148 over Stream	1961	1,200	Fair
H34 Hull St over Stream	2022	875	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 Adams County → - all 185, 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.