esshup,
I connected with teehjaeh57 as you suggested and we had an excellent conversation. He shared a lot of great information on pond siting, construction/sealing, cost and resources. It's rare to have someone with his knowledge take time out of their day (1hr 15 minute call) to offer help with no compensation.
I know this post reads like a review, but I'm very appreciative of the guidance teehjaeh57 offered and wanted to recognize his efforts.
Thanks for the suggestion to reach out to him.