Bridge conditions in Buchanan County, Iowa
320 inventoried bridges · 20 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Buchanan County tracks close to typical: 20 of its 320 inventoried bridges (6.2%) are rated poor, against a national rate of about 7%.
- 20 of the 320 bridges in Buchanan County, Iowa, are rated in poor condition (6.2%) in the 2025 National Bridge Inventory, as of .
- 139 bridges (43.4%) are rated good and 161 (50.3%) fair.
- The median Buchanan County bridge was built in 1986.
- The busiest poor-rated bridge is Racine Ave over Drainage Ditch (built 1953), carrying about 2,671 vehicles a day.
Good 43.4% · Fair 50.3% · Poor 6.2% of 320 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 |
|---|---|---|---|
| Racine Ave over Drainage Ditch | 1953 | 2,671 | Poor |
| Racine Ave over Small Natural Stream | 1954 | 2,671 | Poor |
| FM over Wapsipinicon River | 1962 | 1,390 | Poor |
| FM over Small Stream | 1952 | 790 | Poor |
| FM over Br Buffalo Creek | 1962 | 776 | Poor |
| 220TH St over Drainage Ditch | 1927 | 760 | Poor |
| 330TH St over Bear Creek | 1951 | 648 | Poor |
| Concord St over Drainage | 1900 | 220 | Poor |
| Loc 150TH St over Otter CR | 1953 | 130 | Poor |
| Parrish Ave over Pine CR | 1960 | 80 | Poor |
| FM over Small Stream | 1957 | 79 | Poor |
| Local 260TH St over Lime CR | 1986 | 41 | Poor |
| Loc Taylor Ave over Buffalo CR | 1951 | 35 | Poor |
| Local 325TH St over Mud CR | 1953 | 30 | Poor |
| Pine Creek Ave over Small Stream | 2012 | 30 | Poor |
| Local over Small Stream | 1951 | 30 | Poor |
| Freeman Ave over Small Stream | 1950 | 21 | Poor |
| Local 305TH St. over Lime CR | 1910 | 16 | Poor |
| Local over Small Stream | 1951 | 15 | Poor |
| Loc Finley Ave over Lime CR | 1925 | 11 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-380 over Mud Creek | 1983 | 17,700 | Good |
| US 20 over Drainage Ditch | 1980 | 10,700 | Good |
| 1ST St W over Wapsipinicon River | 1917 | 10,258 | Fair |
| US 20 over Drainage Ditch | 1980 | 10,100 | Good |
| US 20 over Drainage Ditch | 1980 | 10,100 | Fair |
| Ia 150 over Wapsipinicon River | 1927 | 9,000 | Fair |
| NB I-380 over Bear Creek | 1984 | 8,950 | Good |
| SB I-380 over Bear Creek | 1984 | 8,950 | Good |
| NB I-380 over Lime Creek | 1984 | 8,850 | Fair |
| SB I-380 over Lime Creek | 1984 | 8,850 | 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.