Hi Daniel, welcome. Do you have any pictures that will help us. A 5 A lake would be great, and you should go for it. The first concern, as you noted, is the dam. It's hard to make a general statement about that - it might not be as bad as you think. A pro would be the best way to go, unless you have the knowledge and the time. There will be good people coming to offer advise shortly, so get ready - you can do this...
