Oops, I didn't answer your question about filling the pond. We might get lucky and hit a spring when we dig, but the plan is to fill the pond from runoff. There's more than 5 acres uphill that drains into the proposed site. I don't think we could successfully raise trout although that would be awesome if we could. I'd be happy with some decent sized bluegills or rockbass, or yellow perch. We like almost anything to eat. Bluegills are fun on the fly rod.