Cecil,
You are a pro...I just have some limited experience in specific parts of the country with cold water fish. The smaller pond has no flow at all, it just sits. But, the water is deep and hard, and it seems to be working. We'll know in a year or two.
The bigger lake is gin clear and is constantly fed with a water well. This lake is used as a water supply to feed a large lodge and conference center. It, too, is deep. It just seems to be the nature of both lakes to have adequate oxygen below the thermocline. That's a foreign concept to someone like me from the south. I may come back in a year or two with a completely different opinion, but for now, I'm optimistic about year round trout in upstate NY.
