Ice Thickness Chart
Compare a measurement with published guidance
This compares thickness only; it cannot decide whether ice is safe. Check repeatedly along your route and ask local authorities. The Minnesota DNR guidelines distinguish moving and stationary loads. White ice uses double the clear-ice reference.
| Activity | Inches |
|---|---|
| On foot | 4 |
| Snowmobile / small ATV | 5–7 |
| Side-by-side ATV | 7–8 |
| Small car / SUV | 9–10 |
| Medium SUV / small truck | 11–12 |
These are thickness references, not a safety clearance. Never use this chart to approve a crossing or a parked load.