Bridge conditions in Otter Tail County, Minnesota
148 inventoried bridges · 11 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
11 of the 148 bridges the federal inventory lists in Otter Tail County are rated poor; the rest split 59 good and 78 fair.
- 11 of the 148 bridges in Otter Tail County, Minnesota, are rated in poor condition (7.4%) in the 2025 National Bridge Inventory, as of .
- 59 bridges (39.9%) are rated good and 78 (52.7%) fair.
- The median Otter Tail County bridge was built in 1979.
- The busiest poor-rated bridge is Mn 78 over US 10 (built 1974), carrying about 6,500 vehicles a day.
Good 39.9% · Fair 52.7% · Poor 7.4% of 148 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 |
|---|---|---|---|
| Mn 78 over US 10 | 1974 | 6,500 | Poor |
| Mn 210 over I 94 | 1961 | 5,200 | Poor |
| Csah 34 over US 10 | 1973 | 2,500 | Poor |
| Msas 116 over Otter Tail River | 1908 | 1,350 | Poor |
| Csah 1 over Dead River | 1977 | 1,300 | Poor |
| Csah 24 over I 94 | 1968 | 385 | Poor |
| Csah 19 over Blue Creek | 1952 | 350 | Poor |
| Csah 67 over Leaf River | 1953 | 290 | Poor |
| Csah 76 over Bluff Creek | 1956 | 260 | Poor |
| Csah 42 over Wing River | 1966 | 245 | Poor |
| Csah 56 over Blue Creek | 1970 | 195 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 94 over Otter Tail River | 1960 | 17,300 | Fair |
| Msas 104 over Ottertail River | 2002 | 11,700 | Good |
| I 94 over Csah 88 | 1964 | 9,100 | Fair |
| Msas 104 over Otv Railroad | 1939 | 8,700 | Fair |
| US 10 over Otter Tail River | 1972 | 8,640 | Good |
| I 94 over Csah 88 | 1964 | 8,156 | Fair |
| I 94 over Pelican River | 1960 | 8,156 | Fair |
| I 94 over Otvr | 1961 | 8,156 | Fair |
| I 94 over Otvr | 1961 | 8,156 | Fair |
| US 59 over Pelican River | 1922 | 7,856 | 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.