Mother Nature sure Is something!! The big rivers In northern Minnesota really do some damage In the spring when snow really starts to melt. The rivers will go up 15 to 20 feet depending on how much snow and how many Ice jams are going on. Tree's 5 feet In diameter will get snapped right off that are on the bank from the huge chunks of Ice and moving water. Nothing too much more powerful then a big river with high water and Ice. It's an awesome sight to witness.