If they buried them behind the dam they shouldn't be an issue.
One other thing. Although now might look like a good time to dig that area out, it might not be. The soil to be packed has to have some moisture to make it pack properly. During the summer, in my arid area, we often can't build ponds. The best mixture is about 60 percent clay and the rest dirt. And, it should be mixed in some way; especially when packing and rebuilding. 100% clay cracks when it is dry and can actually not seal quickly enough.
Good to know the trees (buried behind the dam) aren't an issue. I was concerned they might be a part of my problem....
Would you suggest waiting until we're no longer in a drought situation to attempt this fix? We're nearly 12" behind in moisture for this year, 2011 was almost as bad............. Also, by what means should the dirt/clay be mixed when repacking?
