A buddy of mine has a camp up there, last weekend (March 12/13) we drilled 15 inches of hard ice. This Saturday, my augur dipped through like butter. The ice wasn't nearly as hard. I am not an ice strength expert, but I can tell you that I was shocked at the difference a week made (even with relatively cold temps besides one 50 degree day). I am sure with the temps this week, you would go drill 10 inches average next weekend too and be just fine. The best thing I can say is that the edges were solid, and that shouldn't change.
