Bridge conditions in Franklin County, Iowa
227 inventoried bridges · 28 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Franklin County has 28 bridges rated poor out of 227 inventoried, a 12.3% share that puts it well above the national rate of about 7%.
- 28 of the 227 bridges in Franklin County, Iowa, are rated in poor condition (12.3%) in the 2025 National Bridge Inventory, as of .
- 103 bridges (45.4%) are rated good and 96 (42.3%) fair.
- The median Franklin County bridge was built in 1975.
- The busiest poor-rated bridge is FM 255TH St over Beaverdam Creek (built 1969), carrying about 687 vehicles a day.
Good 45.4% · Fair 42.3% · Poor 12.3% of 227 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 |
|---|---|---|---|
| I-35 over Drainage Ditch | 1972 | 17,300 | Good |
| I-35 over Drainage Ditch | 1973 | 17,000 | Good |
| I-35 over Drainage Ditch | 1972 | 16,900 | Fair |
| I-35 over Stream | 1974 | 15,300 | Fair |
| I-35 over Drainage Ditch NO.48 | 1974 | 15,100 | Good |
| NB I-35 over Buffalo Creek | 1973 | 8,600 | Good |
| SB I-35 over Buffalo Creek | 1973 | 8,450 | Good |
| NB I-35 over over Aband RR | 1974 | 8,400 | Good |
| NB I-35 over SR C-13 | 1972 | 8,350 | Fair |
| SB I-35 over SR C-13 | 1972 | 8,350 | 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 Franklin County → - all 227, 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.