| Load/Activity | Minimum Safe Ice Depth (in inches) |
|---|---|
| Cross-country skiing (one person) | 3 |
| Ice fishing or skating (one person) | 4 |
| One snowmobile | 5 |
| Ice boating | 6 |
| Group activities | 7 |
| One car | 8 |
| Several snowmobiles | 9 |
| Light truck (2.5 tons) | 10.5 | Medium truck (3.5 tons) | 12 |
| 10-ton load | 15 |
| 25-ton load | 20 |