Otter Tail County Bridge Report Card
Otter Tail County scores 81 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Otter Tail County, Minnesota
Otter Tail County has 148 bridges in the National Bridge Inventory, with 11 rated poor and 0 rated scour-critical. Its poor-condition share of 7.4% is above the 4.5% statewide average. Poor-condition bridges carry about 18,575 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Otter Tail County a Bridge Condition Exposure Score of 81/100 (B). The county has 148 bridges in the National Bridge Inventory, including 11 in poor condition and 0 rated scour-critical. Poor-condition bridges carry about 18,575 daily vehicle crossings. Poor condition does not mean unsafe; bridges judged unsafe are closed or restricted by transportation agencies.
How the Score Breaks Down
| Factor | Weight | County Value | Penalty |
|---|---|---|---|
| Poor-condition bridge share | 40 | 7.4% | 14.9 |
| Poor-condition traffic exposure | 25 | 6.2% of measured traffic | 4.6 |
| Scour-critical bridge share | 20 | 0.0% | 0.0 |
| Average age vs national baseline | 10 | 45 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 300,609 measured daily crossings | 0.0 |
Score = 100 minus weighted penalties. The score is a comparative research signal, not an official safety rating. Read the full methodology.
County Comparisons
| County Poor-Condition Share | 7.4% |
| State Poor-Condition Share | 4.5% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 0.0% |
| Average Bridge Age | 45 years |
| Poor-Condition Traffic Exposure | 18,575 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Otter Tail County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Mn 78 over US 10 | Poor condition + traffic exposure | Poor | 6,500 | 1974 |
| Mn 210 over I 94 | Poor condition + traffic exposure | Poor | 5,200 | 1961 |
| Csah 34 over US 10 | Poor condition + traffic exposure | Poor | 2,500 | 1973 |
| Msas 116 over Otter Tail River | Poor condition + traffic exposure | Poor | 1,350 | 1908 |
| Csah 1 over Dead River | Poor condition + traffic exposure | Poor | 1,300 | 1977 |
| Csah 24 over I 94 | Poor condition + traffic exposure | Poor | 385 | 1968 |
| Csah 19 over Blue Creek | Poor condition + traffic exposure | Poor | 350 | 1952 |
| Csah 67 over Leaf River | Poor condition + traffic exposure | Poor | 290 | 1953 |
| Csah 76 over Bluff Creek | Poor condition + traffic exposure | Poor | 260 | 1956 |
| Csah 42 over Wing River | Poor condition + traffic exposure | Poor | 245 | 1966 |
Important safety note
Poor condition does not mean a bridge is unsafe. It means at least one major component has significant deterioration and the bridge is a priority for maintenance, repair, or replacement. Bridges judged unsafe are closed or restricted by transportation agencies.