The trees are tulip poplars and they are on the pond side of the dam. I was of the belief poplars had a shallow root system that's why they're susceptible to blow overs in heavy winds. I'll be repairing the spillway this spring and installing a discharge pipe(they didn't install one when the pond was built in the mid 60's). I suppose I'll tackle the removal of the trees at that point. The one trees is in close proximity to the spill way and removal could be incooperated in the repair, but the other is in the middle of the dam. Thanks for your reply's Paul