We are thinking about doing the new one at the site 600 feet from the house, but it probably couldn't be more than about 1/8 acre and 8 feet deep. I suppose one could raise about 25 good CC in that? Anyway it's still in the debate stage. Small size and too far from the house to have good control are our main concerns.
Here is a Google Earth pic. The existing ponds are to the left. The failed site is circled in red. A new, smaller pond could be built to the east (right) in a triangle with the existing ponds. It is higher and the clay is very good there. The house is where the yellow markers are, so you can see our dilemma.

Attached Images
New pond.jpg