Bridge conditions in Mills County, Iowa
184 inventoried bridges · 35 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Of the 184 Mills County bridges in the federal inventory, 35 carry a poor rating. That 19.0% share is roughly 3x the national average.
- 35 of the 184 bridges in Mills County, Iowa, are rated in poor condition (19.0%) in the 2025 National Bridge Inventory, as of .
- 54 bridges (29.3%) are rated good and 95 (51.6%) fair.
- The median Mills County bridge was built in 1971.
- The busiest poor-rated bridge is Fa-barrus Rd over Pony Creek (built 1969), carrying about 1,524 vehicles a day.
Good 29.3% · Fair 51.6% · Poor 19.0% of 184 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 |
|---|---|---|---|
| Fa-barrus Rd over Pony Creek | 1969 | 1,524 | Poor |
| Fa-gaston Ave over Keg Creek | 1967 | 1,065 | Poor |
| Fa-barrus Rd over Keg Creek | 1951 | 698 | Poor |
| 310TH St over Stream | 1960 | 325 | Poor |
| Fa-gaston Ave over Drainage | 1951 | 139 | Poor |
| Lcl-jesup Ave over Major Drainage | 1970 | 133 | Poor |
| Fm-215th St over Creek | 1969 | 91 | Poor |
| Lcl-allis Rd over Stream | 1978 | 89 | Poor |
| Fm-paddock Rd over Local Creek | 1970 | 71 | Poor |
| Lcl-elderberry over Mud Creek | 1960 | 60 | Poor |
| Fa-paddock Ave over Hunters Branch | 1962 | 51 | Poor |
| Lcl-410th St over Indian Creek | 1950 | 51 | Poor |
| Lcl-410th St over Local Creek | 1972 | 51 | Poor |
| Lcl-merrill Rd over Drainage | 1964 | 50 | Poor |
| Lcl-380th St over Indian Creek | 1964 | 50 | Poor |
| Lcl-400th St over Indian Creek | 1957 | 50 | Poor |
| Lcl-ellington over Keg Creek | 1964 | 41 | Poor |
| Lcl-marh Ave over Nishna River | 1940 | 40 | Poor |
| Lcl-painter Rd over Drainage | 1930 | 35 | Poor |
| Fm-397th St over Farm Creek | 1959 | 34 | Poor |
| Lcl-400th St over Hunters Branch | 1965 | 26 | Poor |
| Lcl-400th St over Indian Creek | 1940 | 26 | Poor |
| Lcl-fry Ave over Mud Creek | 1940 | 26 | Poor |
| Lcl-pathfield over Waubonsie CR | 1940 | 20 | Poor |
| Lcl-rains Ave over Spring Valley Creek | 1970 | 20 | Poor |
| Lcl-queen Ave over Deer Creek | 1940 | 15 | Poor |
| Lcl-rains Av over Hunter Branch | 1950 | 15 | Poor |
| Lcl-rist Ave over Drainage | 1961 | 15 | Poor |
| Lcl-jarred Ave over Creek | 1940 | 15 | Poor |
| Lcl-quigg Ave over Spring Valley CR | 1940 | 11 | Poor |
| Lcl-305th St over Creek | 1990 | 11 | Poor |
| Lcl-380th St over Deer Creek | 1977 | 5 | Poor |
| Lcl-ingraham Av over Stream | 1954 | 5 | Poor |
| Lcl-jahnke Ave over Silver Creek | 1938 | 5 | Poor |
| Lcl-compass Ave over Farm Creek | 1963 | 5 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-29 over Fulsom Lake Outlet | 2010 | 19,700 | Good |
| NB I-29 over St Marys Creek | 2009 | 9,850 | Good |
| SB I-29 over St Marys Creek | 2009 | 9,850 | Good |
| Locust Street over Tinkle Branch | 1976 | 8,957 | Fair |
| US 34 over Missouri River | 2014 | 7,100 | Good |
| NB I-29 over Drainage Ditch | 2009 | 6,850 | Good |
| SB I-29 over Drainage Ditch | 2009 | 6,850 | Good |
| NB I-29 over Haynie Slough | 1971 | 6,850 | Fair |
| SB I-29 over Haynie Slough | 1971 | 6,850 | Fair |
| NB I-29 over Keg Creek | 1971 | 6,850 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
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.