Bridge conditions in Jefferson County, Iowa
156 inventoried bridges · 31 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
About one in 5 bridges in Jefferson County is rated in poor condition: 31 of 156 on the federal inventory, one of the higher shares in Iowa.
- 31 of the 156 bridges in Jefferson County, Iowa, are rated in poor condition (19.9%) in the 2025 National Bridge Inventory, as of .
- 70 bridges (44.9%) are rated good and 55 (35.3%) fair.
- The median Jefferson County bridge was built in 1986.
- The busiest poor-rated bridge is E Burlington Ave over West Crow Creek (built 1954), carrying about 2,100 vehicles a day.
Good 44.9% · Fair 35.3% · Poor 19.9% of 156 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.
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 34 EB over BNSF RR | 2008 | 7,800 | Good |
| US 34 WB over BNSF RR | 2008 | 7,800 | Good |
| US 34 over Mitchell Creek | 2009 | 4,360 | Good |
| Ia 1 over Crow Creek | 1928 | 4,100 | Fair |
| US 34 EB over Big Cedar Creek | 2016 | 3,900 | Fair |
| US 34 WB over Big Cedar Creek | 2006 | 3,900 | Good |
| US 34 WB over Church Creek | 2007 | 3,900 | Fair |
| US 34 EB over Church Creek | 2007 | 3,900 | Good |
| US 34 EB over Ash Ave | 2006 | 3,650 | Good |
| US 34 WB over Ash Ave | 2006 | 3,650 | 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 Jefferson County → - all 156, 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.