Bridge conditions in Union County, Iowa
172 inventoried bridges · 55 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Union County has 55 bridges rated poor out of 172 inventoried, a 32.0% share that puts it well above the national rate of about 7%.
- 55 of the 172 bridges in Union County, Iowa, are rated in poor condition (32.0%) in the 2025 National Bridge Inventory, as of .
- 53 bridges (30.8%) are rated good and 64 (37.2%) fair.
- The median Union County bridge was built in 1981.
- The busiest poor-rated bridge is Lincoln St over Hurley Creek (built 1973), carrying about 875 vehicles a day.
Good 30.8% · Fair 37.2% · Poor 32.0% of 172 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 |
|---|---|---|---|
| Lincoln St over Hurley Creek | 1973 | 875 | Poor |
| FM over Br W Platte River | 1957 | 788 | Poor |
| FM over Creek | 1964 | 409 | Poor |
| Local So.cherry over Small Stream | 1968 | 278 | Poor |
| FM over East Platte River | 1963 | 199 | Poor |
| Local over Stream | 1985 | 180 | Poor |
| FM over Outlet Green Valley Lk | 1951 | 159 | Poor |
| Local over Stream | 1981 | 123 | Poor |
| Loc 170TH St over Small Stream | 1988 | 113 | Poor |
| FM over Small Stream | 1985 | 71 | Poor |
| Local over Twelve Mile Creek | 1979 | 62 | Poor |
| FM over Wolf Creek | 1976 | 60 | Poor |
| Local over Stream | 1900 | 51 | Poor |
| FM over Sand Creek | 1963 | 50 | Poor |
| 170TH Street over Grand River | 1957 | 46 | Poor |
| Local over Stream | 1988 | 46 | Poor |
| Local over Sand Creek | 1967 | 41 | Poor |
| Local over Stream | 1977 | 41 | Poor |
| FM over Stream | 1951 | 40 | Poor |
| FM over Middle Platte River | 1952 | 40 | Poor |
| Local over Stream | 1991 | 35 | Poor |
| Local over Twelve Mile Creek | 1930 | 35 | Poor |
| Loc Dogwood Ave over Small Stream | 1989 | 35 | Poor |
| Local over Three Mile Creek | 1978 | 35 | Poor |
| Local over East Platte River | 1981 | 30 | Poor |
| Local over Small Stream | 1900 | 30 | Poor |
| Local over Small Stream | 1900 | 30 | Poor |
| Local over Small Stream | 1943 | 30 | Poor |
| Local Road over Stream | 1900 | 26 | Poor |
| Local over Small Stream | 1940 | 26 | Poor |
| Local over Stream | 1900 | 21 | Poor |
| Local over Wolf Creek | 1983 | 21 | Poor |
| Local over Small Stream | 1992 | 21 | Poor |
| Loc B Level Rd over Stream | 1940 | 21 | Poor |
| Local over Small Stream | 1973 | 15 | Poor |
| Local over East Platte River | 1969 | 15 | Poor |
| Local over Stream | 2000 | 15 | Poor |
| Local over West Platte River | 1900 | 15 | Poor |
| Local over Stream | 1900 | 15 | Poor |
| Local over Small Stream | 1979 | 15 | Poor |
| Local over Stream | 1900 | 11 | Poor |
| Local over Stream | 1992 | 11 | Poor |
| Local over Small Stream | 1990 | 11 | Poor |
| Local over Branch East Platte | 1978 | 11 | Poor |
| Local over Middle Platte River | 1970 | 11 | Poor |
| Local over Platte River | 1989 | 11 | Poor |
| Local over Small Stream | 1964 | 11 | Poor |
| Local over Small Stream | 1980 | 11 | Poor |
| Local over Small Stream | 1990 | 5 | Poor |
| Local over Small Stream | 1900 | 5 | Poor |
| Local Rd over Stream | 1973 | 5 | Poor |
| Local over Four Mile Creek | 1967 | 5 | Poor |
| Local over Small Stream | 1900 | 5 | Poor |
| Local B Level over Small Stream | 1973 | 5 | Poor |
| Local over Small Stream | 1900 | 5 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 34 over Br. East Platte River | 1971 | 4,890 | Fair |
| US 34 over over BNSF RR | 1971 | 4,890 | Fair |
| US 34 over Twelve Mile Creek | 1971 | 4,890 | Fair |
| US 34 over Twelve Mile Creek | 1971 | 4,890 | Fair |
| Ia 25 over Stream | 1976 | 4,870 | Fair |
| US 169 over BNSF RR | 1980 | 3,870 | Good |
| US 34 & Ia 25 over Branch Platte River | 1973 | 3,730 | Fair |
| US 34 & 169 over over UP Rr(aband) | 1971 | 3,450 | Fair |
| US 34 & 169 over Grand River | 1971 | 3,450 | Fair |
| US 34 over Four Mile Creek | 1971 | 3,040 | 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.