Plastic Floats
A manufacturer of these floats claims that they won't really freeze into the ice but instead will be pushed up on top of it as it freezes. If that is true pressure of expanding ice wouldn't matter. If there is a lot of ice movement, from wind and current as the ice breaks up, that could still cause problems, possibly pulling the dock away. I don't know anyone who has used them in this climate so I don't know if the claims are true. I like the idea but I don't like the looks of them.
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