Bridge conditions in Jackson County, Iowa
252 inventoried bridges · 36 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Jackson County has 36 bridges rated poor out of 252 inventoried, a 14.3% share that puts it well above the national rate of about 7%.
- 36 of the 252 bridges in Jackson County, Iowa, are rated in poor condition (14.3%) in the 2025 National Bridge Inventory, as of .
- 78 bridges (31.0%) are rated good and 138 (54.8%) fair.
- The median Jackson County bridge was built in 1986.
- The busiest poor-rated bridge is FM over S Copper Creek (built 1974), carrying about 1,070 vehicles a day.
Good 31.0% · Fair 54.8% · Poor 14.3% of 252 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 61 over Drainage Ditch | 1967 | 8,100 | Good |
| Y53 200TH Ave over Prairie Creek | 2022 | 7,205 | Good |
| US 61 NB over S Fork Maquoketa River | 1967 | 5,100 | Fair |
| US 61 SB over S Fork Maquoket River | 1998 | 5,100 | Fair |
| NB US 61 over Prairie Creek | 1967 | 4,600 | Fair |
| SB US 61 over Prairie Creek | 1996 | 4,600 | Good |
| US 61 NB over N Fork Maquoketa River | 1967 | 4,050 | Fair |
| US 61 NB over Farmers Creek | 1966 | 4,050 | Fair |
| US 61 NB over Farmers Creek | 1966 | 4,050 | Good |
| US 61 NB over Tarecod Creek | 1967 | 4,050 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
Every bridge in Jackson County → - all 252, 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.