There is a creek that goes through my land into my neighbors land, he let a beaver in and it made a big dam. My land is rather low land, and it has changed the water table. Things drain much slower now. If we get a couple inches of rain(that would be awesome right now!), it takes much longer to drain, and I have puddles around me. They have created a nice pond for waterfowl, which wasnt there before, but I dont hunt waterfowl, I do however now live on this land that doesnt drain well anymore. The water table has risen about 6 feet.