Bridge conditions in Koochiching County, Minnesota
98 inventoried bridges · 6 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Koochiching County tracks close to typical: 6 of its 98 inventoried bridges (6.1%) are rated poor, against a national rate of about 7%.
- 6 of the 98 bridges in Koochiching County, Minnesota, are rated in poor condition (6.1%) in the 2025 National Bridge Inventory, as of .
- 51 bridges (52.0%) are rated good and 41 (41.8%) fair.
- The median Koochiching County bridge was built in 1986.
- The busiest poor-rated bridge is US 71 over Little Fork River (built 1980), carrying about 1,458 vehicles a day.
Good 52.0% · Fair 41.8% · Poor 6.1% of 98 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 71 over Little Fork River | 1980 | 1,458 | Poor |
| US 53 over Rainy River | 1912 | 703 | Poor |
| Csah 98 over Rat Root River | 1967 | 110 | Poor |
| CR 101 over Black River | 1922 | 97 | Poor |
| CR 145 over Rat Root River | 1963 | 44 | Poor |
| CR 61 over Dinner Creek | 1993 | 10 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Mn 11 over Stream | 1949 | 5,227 | Fair |
| Mn 11 over Dwp RR | 2018 | 3,565 | Good |
| US 53 over Rat Root River | 1976 | 2,833 | Fair |
| Mn 11 over Jack Fish Bay | 2012 | 2,016 | Good |
| Mn 11 over Tilson Creek | 2012 | 2,016 | Good |
| US 53 over E Br Rat Root River | 1964 | 1,733 | Good |
| US 53 over Dwp Ry | 1985 | 1,603 | Fair |
| US 71 over Little Fork River | 1980 | 1,458 | Poor |
| US 71 over Big Fork River (N Chan) | 1979 | 1,292 | Fair |
| US 71 over Big Fork River (S Chan) | 1979 | 1,292 | 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.