Bridge conditions in Polk County, Minnesota
269 inventoried bridges · 8 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 269 bridges in Polk County: 167 rated good, 94 fair, and 8 poor.
- 8 of the 269 bridges in Polk County, Minnesota, are rated in poor condition (3.0%) in the 2025 National Bridge Inventory, as of .
- 167 bridges (62.1%) are rated good and 94 (34.9%) fair.
- The median Polk County bridge was built in 1994.
- The busiest poor-rated bridge is US 75 over Sand Hill River (built 1995), carrying about 1,100 vehicles a day.
Good 62.1% · Fair 34.9% · Poor 3.0% of 269 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 |
|---|---|---|---|
| US 75 over Sand Hill River | 1995 | 1,100 | Poor |
| Csah 7 over Red River of the North | 1957 | 532 | Poor |
| Csah 1 over Red River of the North | 1939 | 205 | Poor |
| Csah 6 over Lost River | 1967 | 140 | Poor |
| T 530 over BNSF RR | 1925 | 36 | Poor |
| T 209 over Sand Hill River | 1925 | 8 | Poor |
| T 756 over Lost River | 1964 | 6 | Poor |
| T 189 over Br Co Ditch 66 | 1925 | 4 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 2 over Red River | 1963 | 15,475 | Fair |
| US 2 over 4th ST NW | 1964 | 13,700 | Fair |
| US 2B over Red River | 1929 | 13,400 | Fair |
| Msas 119 over Red Lake River | 1980 | 7,400 | Fair |
| Msas 113 over Red River of the North | 1967 | 6,630 | Fair |
| US 2 over Red Lake River | 1990 | 4,760 | Fair |
| US 2 over Stream | 2018 | 3,918 | Good |
| Msas 144 over Red Lake River | 1955 | 3,700 | Fair |
| Mn 220 over Grand Marais River | 1983 | 3,412 | Fair |
| Csah 11 over Red Lake River | 1977 | 3,100 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Minnesota: Minnesota 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.