I’m potentially looking at a piece of ground and was interested in putting a 1/4 acre pond in the lower end of the lot. I do concrete foundations for a living, so cost for the concrete wall is not an issue. Could I potentially pour a concrete wall on the three sides marked in blue on the pic for the dam? Would I still have to mound dirt up on both sides? How would you seal something like that off to keep it from leaking? Highest point of dam would probably be 10-12’ tall