Today on my walk, I discovered a useful sign by the lake that explained how to know if the ice is safe to go out on. The strongest ice is blue. White ice is half the strength of blue ice. Gray ice is unsafe. It should be at least 15cm thick for people to skate on. It should be 20cm thick for a group of people to play hockey on. It should be at least 25cm thick to snowmobile on. Good to know! Though who would want to shatter the peace and quiet with a snowmobile, I don't know.
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