In February 2010 I drove up the hill behind my house once again and recorded more ice breaking. Keep in mind this “back hill” peak is actually 4000 feet above Sandpoint, Idaho. This time I found a very large water containment pond that had frozen solid when it was extremely cold back in January. The standing water under the ice had drained away and the top 10 inches or so of ice had collapsed in on itself. It was hollow ...