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Bridge conditions in Woodbury County, Iowa

455 inventoried bridges · 95 rated poor · 2025 National Bridge Inventory

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

About one in 5 bridges in Woodbury County is rated in poor condition: 95 of 455 on the federal inventory, one of the higher shares in Iowa.

95 of the 455 bridges in Woodbury County, Iowa, are rated in poor condition (20.9%) in the 2025 National Bridge Inventory, as of August 20, 2026.
178 bridges (39.1%) are rated good and 182 (40.0%) fair.
The median Woodbury County bridge was built in 1988.
The busiest poor-rated bridge is Ia 12 over BNSF Rvr Sts & Ia 376 (built 1936), carrying about 20,600 vehicles a day.

Good 39.1% · Fair 40.0% · Poor 20.9% of 455 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
Ia 12 over BNSF Rvr Sts & Ia 376	1936	20,600	Poor
6TH St over Floyd River	1962	8,957	Poor
4TH St. over over RR	1984	6,031	Poor
Dace Ave over Floyd River	1962	4,432	Poor
11TH St over Floyd River	1962	3,523	Poor
Ia 141 over I-29	1959	2,980	Poor
Larsen Park Rd over Perry Creek	1963	2,330	Poor
Correctionville over Bacon Creek	1900	1,664	Poor
D-25 over Small Natural Stream	1959	1,207	Poor
D-25 over Elliot Creek	1957	977	Poor
D 25 over Small Stream	1978	977	Poor
D-25 over Camp Creek	1978	977	Poor
FM over Elliott Creek	1958	797	Poor
FM over Mud Creek	1969	709	Poor
FM over Muddy Creek	1967	628	Poor
FM over Whiskey Creek	1967	628	Poor
FM over West Fork Little Sioux	1955	549	Poor
FM over Creek	1955	549	Poor
FM over West Fork Little Sioux	1955	549	Poor
FM over West Fork Little Sioux	1960	509	Poor
FM over West Fork Little Sioux	1963	469	Poor
FM over West Fork Little Sioux	1955	429	Poor
FM over Bacon Creek	1968	390	Poor
Main St L43 over Bacon Creek	1958	383	Poor
FM over Creek	1962	379	Poor
FM over Drainage Ditch	1960	369	Poor
FM over Big Creek	1962	369	Poor
FM over Bacon Creek	1967	359	Poor
FM over Creek	1961	350	Poor
FM over Wolf Creek	1958	330	Poor
D54 Danbury over Creek	1959	319	Poor
FM over West Fork Little Sioux	1969	309	Poor
FM over Big Creek	1964	270	Poor
FM over Stream	1981	270	Poor
FM over Drainage Ditch	1960	230	Poor
FM over Creek	1962	219	Poor
FM over Rock Creek	1900	199	Poor
FM over Creek	1963	190	Poor
Rustin St over Bacon Creek	1900	188	Poor
FM over Wolf Creek	1968	80	Poor
Local over Stream	1950	80	Poor
Local over Stream	1915	80	Poor
FM over Garretson Ditch	1955	71	Poor
Local over Stream	1920	60	Poor
Local over Creek	1950	60	Poor
Local over Muddy Creek	1970	60	Poor
Local over Stream	1980	60	Poor
Millers Path over Stream	1947	50	Poor
FM over Creek	1978	50	Poor
Local over Stream	1950	50	Poor
West St over Drainage	1930	48	Poor
Local over Stream	1952	45	Poor
Emmett Ave over Deer Creek	1977	45	Poor
FM over Wolf Creek	1956	40	Poor
Local over Br Elliott Creek	1980	40	Poor
Local over Mcelhaney Creek	1960	40	Poor
Local over W Fk Little Sioux River	1952	30	Poor
Local over Farmers Ditch	1900	30	Poor
Local over Wolf Creek	1940	30	Poor
Local over Big Whiskey Creek	1953	30	Poor
Local over Creek	1947	26	Poor
Local over Wolf Creek	1949	26	Poor
Local over Stream	1981	26	Poor
Local over Parnell Creek	1935	20	Poor
Local over Wolf Creek	1950	20	Poor
Local over Garretson Drainage Ditch	1970	20	Poor
Local over Wolf Creek	1981	20	Poor
Local over Stream	1970	20	Poor
Local over Wright Creek	1900	20	Poor
Local over Mcelhaney Creek	1981	20	Poor
Local over Stream	1950	15	Poor
Local over Stream	1940	15	Poor
Local over Stream	1938	15	Poor
Local over Stream	1979	15	Poor
Local over Stream	1950	15	Poor
Local over Stream	1979	15	Poor
Local over Creek	1955	15	Poor
Local over Stream	1940	15	Poor
Local over Wolf Creek	1960	15	Poor
Local over Farmers Ditch	1980	11	Poor
Local over Small Stream	1985	11	Poor
Local over Wolf Creek	1938	11	Poor
Local over W Fk Little Sioux River	1935	11	Poor
Local over Wright Creek	1950	11	Poor
Local over Wright Creek	1950	11	Poor
Local over Stream	1965	11	Poor
Local over Stream	1997	11	Poor
Local over Stream	1955	11	Poor
Local over Stream	1942	5	Poor
Pocahontas Ave over Stream	1935	5	Poor
252ND St over Stream	1985	5	Poor
Local over Miller Creek	1951	5	Poor
Local over Stream	1950	5	Poor
Local over Stream	1950	5	Poor
Mason Ave over Stream	1970	5	Poor

Busiest bridges in the county

Bridge	Built	Vehicles/day	Condition
I29 NB Off Ramp over Perry Creek Conduit	2017	91,000	Good
US 77 over Missouri River & Rd	1981	34,600	Fair
I 29 Ia 12 over Drainage-all of Roadway	1957	32,900	Fair
US 77 over I 29 & Ia 12 NB	2012	26,900	Good
I 29 SB over Pierce St Frontage Rd	2018	21,100	Fair
Ia 12 over BNSF Rvr Sts & Ia 376	1936	20,600	Poor
I 29 SB over Bacon Creek	2014	18,900	Fair
I 29 NB over Bacon Creek	2016	18,900	Fair
Hamilton Blvd over Perry Creek	1971	18,291	Fair
US 75 over Stream	1999	18,200	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 Woodbury County → - all 455, 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.