Thank you all for your input i really appreciate it, it gives me a lot to think about. The one tree that concerns me the most is in the center of the dam and it comes out of the ground about 6' below what would be the surface of the water and the water is 11' deep at that point. In theory the drip line of the limbs would put the roots 3 or 4 feet from waters edge at that depth. Im not to concerned as to how much water the tree consumes my water shed works well. Like someone said my worry was the roots rotting an creating a waterway through my dam. With that being said poplar trees grow BIG around here. What are the possible down sides of leaving it since its already as big as it is all ive really heard about is the root rotting thing. And again thank you all in advance, i dont get access to the internet that often.

Greg R