Bridge conditions in Mille Lacs County, Minnesota
107 inventoried bridges · 8 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 107 bridges in Mille Lacs County: 53 rated good, 46 fair, and 8 poor.
- 8 of the 107 bridges in Mille Lacs County, Minnesota, are rated in poor condition (7.5%) in the 2025 National Bridge Inventory, as of .
- 53 bridges (49.5%) are rated good and 46 (43.0%) fair.
- The median Mille Lacs County bridge was built in 1984.
- The busiest poor-rated bridge is Csah 12 over W Br Rum River (built 1974), carrying about 1,700 vehicles a day.
Good 49.5% · Fair 43.0% · Poor 7.5% of 107 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 |
|---|---|---|---|
| Csah 12 over W Br Rum River | 1974 | 1,700 | Poor |
| Csah 25 over Rum River | 1973 | 1,050 | Poor |
| Csah 13 over W Br Rum River | 1971 | 640 | Poor |
| Csah 5 over Estes Brook | 1968 | 600 | Poor |
| Csah 20 over Rum River | 1966 | 520 | Poor |
| Csah 19 over Rum River | 1970 | 300 | Poor |
| Csah 13 over Estes Brook | 1960 | 120 | Poor |
| CR 121 over Estes Brook | 2013 | 40 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Csah 29 over W Br Rum River | 2010 | 10,400 | Good |
| Mn 95 over US 169 | 1979 | 10,100 | Fair |
| Mn 95 over Battle Brook | 1956 | 10,100 | Fair |
| US 169 over Bradbury Brook | 1990 | 9,915 | Fair |
| US 169 over W Br Rum River | 1978 | 9,650 | Fair |
| US 169 over W Br Rum River | 1978 | 9,650 | Fair |
| US 169 over Csah 29 | 1979 | 9,650 | Fair |
| Mn 23 over Rum River | 2009 | 9,400 | Good |
| US 169 over Csah 31 | 1979 | 9,150 | Fair |
| US 169 over Csah 29 | 1979 | 9,150 | 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.