Bridge conditions in Cass County, Minnesota
85 inventoried bridges · 7 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 85 bridges in Cass County: 40 rated good, 38 fair, and 7 poor.
- 7 of the 85 bridges in Cass County, Minnesota, are rated in poor condition (8.2%) in the 2025 National Bridge Inventory, as of .
- 40 bridges (47.1%) are rated good and 38 (44.7%) fair.
- The median Cass County bridge was built in 1991.
- The busiest poor-rated bridge is Csah 1 over S Fk Pine River (built 1961), carrying about 920 vehicles a day.
Good 47.1% · Fair 44.7% · Poor 8.2% of 85 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 1 over S Fk Pine River | 1961 | 920 | Poor |
| Csah 65 over Stream | 1967 | 320 | Poor |
| Ut 133 over Willow River | 1957 | 90 | Poor |
| M 58 over Stony Brook | 1972 | 50 | Poor |
| CR 103 over Mosquito Creek | 1937 | 35 | Poor |
| T 74 over Mayo Creek | 1985 | 20 | Poor |
| T 82 over Mayo Creek | 1991 | 10 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Mn 210 over Gull River | 1952 | 9,175 | Fair |
| Mn 371 over Shingobee River | 1992 | 8,423 | Fair |
| Mn 210 over Mosquito Creek | 2002 | 6,510 | Fair |
| Mn 210 over Pillager Creek | 1953 | 6,510 | Fair |
| Mn 210 over Seven Mile Creek | 1953 | 6,510 | Fair |
| Mn 371 over S Fk Pine River | 1992 | 6,346 | Good |
| Mn 371 over Norway Brook | 1950 | 6,346 | Fair |
| Mn 371 over Kabekona Bay; Walker Ba | 1993 | 5,169 | Fair |
| Csah 1 over Pillager Creek | 1984 | 4,650 | Good |
| Mn 371 over Swamp Creek | 1993 | 3,655 | 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.