First off does the pond contain crappie?? How many acres is it? Is it clear? If it has crappie then I would go out in a boat near the dam to get to the deepest water. I would tie on some 1/8 oz heads and try some BG electric chicken baby shad, a black/pink yum beavertail, or a pumpkin/char one. I would then drop it to the bottom next to the base of the trees and just hold it 1' off bottom. If nothing happens then raise the bait 1' and see what happens. If you have a portable depth finder for your boat then slowly move around the trees looking for suspended fish and drop a jig or minnow to that depth and see what hits.