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Bridge conditions in Tama County, Iowa

337 inventoried bridges · 107 rated poor · 2025 National Bridge Inventory

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

About one in 3 bridges in Tama County is rated in poor condition: 107 of 337 on the federal inventory, one of the higher shares in Iowa.

107 of the 337 bridges in Tama County, Iowa, are rated in poor condition (31.8%) in the 2025 National Bridge Inventory, as of August 20, 2026.
124 bridges (36.8%) are rated good and 106 (31.5%) fair.
The median Tama County bridge was built in 1985.
The busiest poor-rated bridge is 5TH St E over Drainage (built 1915), carrying about 1,054 vehicles a day.

Good 36.8% · Fair 31.5% · Poor 31.8% of 337 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
5TH St E over Drainage	1915	1,054	Poor
Center St over Deer Creek	1982	1,019	Poor
North Main St over Small Stream	1962	869	Poor
FM over Iowa River Overflow	1967	786	Poor
FM over Iowa River Overflow	1968	786	Poor
FM over Iowa River	1968	786	Poor
East St over Wolf Creek	1950	779	Poor
FM over Br Iowa River	1995	717	Poor
FM over Branch Iowa River	1965	678	Poor
E66 over Plague Mine Creek	1976	650	Poor
E66 over Salt Creek	1976	650	Poor
Irr-fm over Iowa River	1988	619	Poor
FM over Branch Iowa River	1969	579	Poor
FM over Wolf Creek	1970	530	Poor
FM over Branch of Iowa River	1936	491	Poor
FM over Plaque Mine Creek	1970	481	Poor
FM over Branch Salt Creek	1970	432	Poor
Station St over Drainage	1925	383	Poor
FM over Salt Creek	1969	363	Poor
FM over So Branch Salt Creek	1969	363	Poor
FM over Branch Salt Creek	1996	344	Poor
FM over Salt Creek	1965	344	Poor
FM over So Branch Salt Creek	1996	344	Poor
E 5TH Street over Overflow Iowa River	1900	320	Poor
E36 over Salt Creek	1959	314	Poor
E36 over Stein Creek	1959	314	Poor
Irr FM over Branch of Richland Creek	1967	304	Poor
FM over Deer Creek	1954	275	Poor
Jacob St over Drainage	1900	232	Poor
FM over Troublesome Creek	1964	226	Poor
Irr Local over Iowa River Overflow	1947	216	Poor
Irr-local over Iowa River Overflow	1953	216	Poor
Irr-local over Iowa River	1938	216	Poor
FM over Small Stream	1981	216	Poor
FM over Wolf Creek Branch	1914	196	Poor
FM over Branch Wolf Creek	1970	196	Poor
FM over Branch Twelve Mile Creek	1967	196	Poor
Local over Sugar Creek	1900	88	Poor
FM over Branch Otter Creek	1927	79	Poor
FM over Salt Creek	1951	79	Poor
Local over Devils Run	1940	70	Poor
Local over Wolf Creek	1957	70	Poor
FM over Branch Salt Creek	1968	59	Poor
Local over Salt Creek	1927	59	Poor
Irr-fm over Bennett Creek	1944	59	Poor
Local over Indian Creek	1940	49	Poor
Local over Kibbe Creek	1991	49	Poor
Local over Crystal Creek	1951	49	Poor
Local over Small	1983	49	Poor
Local over Stream	1975	49	Poor
Local over Richland Creek	1960	44	Poor
Local over Salt Creek	1955	44	Poor
Local over Salt Creek	1897	44	Poor
Elm St over Drainage	1920	40	Poor
FM over Iowa River	1914	39	Poor
FM over Richland Creek	1935	39	Poor
Local over East Branch Salt Creek	1936	39	Poor
Local over Branch Salt Creek	1940	39	Poor
Local over Jordan Creek	1940	39	Poor
Local over East Branch Salt Creek	1969	39	Poor
Local over Small Stream	1986	39	Poor
FM over Deer Creek	1960	39	Poor
Local over Twelve Mile Creek	1925	39	Poor
Local over East Branch Salt Creek	1940	35	Poor
FM over Branch Wolf Creek	1916	34	Poor
Irr Local over Richland Creek	1956	33	Poor
Local over Branch Iowa River	1913	33	Poor
Local over East Branch Salt Creek	1937	33	Poor
Local over Branch of Salt Creek	1983	33	Poor
Irr Local over Branch of Richland Creek	1941	29	Poor
Local over Raven Creek	1940	29	Poor
Local over Small Stream	1987	29	Poor
Local over Otter Creek	1930	29	Poor
Local over South Branch Salt Creek	1940	29	Poor
Local over Br Sugar Creek	1920	29	Poor
Local over Branch Sugar Creek	1920	29	Poor
Local over Wolf Creek	1953	29	Poor
Local over Twelve Mile Creek	1985	29	Poor
Local over Small Stream	1986	29	Poor
Local over Richland Creek	1925	26	Poor
Local over Branch of Salt Creek	1987	26	Poor
Local over East Branch Salt Creek	1987	26	Poor
Local over South Branch Salt Creek	1907	26	Poor
Local over Branch Iowa River	1985	26	Poor
Local over Twelve Mile Creek	1970	26	Poor
FM over Richland Creek	1946	25	Poor
FM over Branch Otter Creek	1940	25	Poor
FM over North Walnut Creek	1970	20	Poor
Local over Wolf Creek	1940	20	Poor
FM over Small	1963	20	Poor
Local over F0UR Mile Creek	1979	20	Poor
Local over Salt Creek	1940	20	Poor
Local over Wolf Creek	1910	20	Poor
Co.rd. over Stream	1965	20	Poor
FM over North Walnut Creek	1930	15	Poor
Local over Wolf Creek	1975	15	Poor
Local over Salt Creek	1910	15	Poor
Local over Salt Creek	1982	11	Poor
Local over Branch Iowa River	1983	11	Poor
Local over Richland Creek	1991	11	Poor
Irr Local over Branch of Richland Creek	1988	11	Poor
Local over Wolf Creek	1895	11	Poor
Local over Four Mile Creek	1988	11	Poor
Local over Branch of Iowa River	1950	5	Poor
Local over Richland Creek	1900	5	Poor
Local over Otter Creek	1920	5	Poor
Local over Salt Creek	2001	5	Poor

Busiest bridges in the county

Bridge	Built	Vehicles/day	Condition
US 30 over Stream	1996	11,500	Good
US 30 WB over Slip Bridge Ramp	2010	7,600	Good
US 30 WB over Salt Creek	2019	6,600	Good
US 30 over Trib to Iowa River	2008	6,500	Good
US 30 WB over Iowa River	2002	5,950	Good
US 30 WB over Iowa River East Overflow	2021	5,950	Good
US 30 EB over Iowa River	2005	5,850	Good
US 30 EB over Iowa River East Overflow	2020	5,850	Good
Irr Bia Rte 1101 over Drainage Ditch	1994	5,358	Good
US 30 over Salt Creek	1989	4,510	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 Tama County → - all 337, 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.