Untitled Sighting

On January 6, 2012 at 11:30PM I took our dog out to do his business before going to bed. We live on a high bank over looking a river. The other side of the river is heavily wooded lowlands. As our dog was doing his business, we heard what almost sounded like a gorilla grunt, approximately 75 feet from me on the edge of the river on the other side. About 45 seconds later we heard another and my dog literally dragged me to the house. Up on the deck we could hear something very large crunching through the branches on the other side of the river keeping pace with us. I walked back to the other end of the deck to see if it would change direction and follow me back and it did. All of a sudden we heard a loud crack like a large branch was broken, followed by a large splash. I heard it take about 3 steps in the water, then climb back out of the water onto the bank and it through a rock across the river. I could hear the water dripping from his fur, once again my dog freaked out and dragged me back to the door of the house. I heard what sounded like a shaggy dog shaking the water off, followed by a really strange snort and then heard him crunch through the underbrush walking away from the river. It was too dark to see across the river, but whatever fell in the river was very large (too big to be any dog) and bears are currently in hibernation. The next morning I looked across to the other side of the river where all the activity was and there is an old rotten tree stump that was split in half to the ground with the broken half laying right at the edge of the river. It wasn't broken the day before.