Pond Boss Forums POND CONSTRUCTION Building a dam Cold water siphon discussion

We put in a geothermal system several years ago. We had looked at using the pond, but the contractors we talked with all talked us out of it. We went with two 300-foot deep closed-loop wells that stay very close to 53 degrees. As ESSHUP says, the bottom of the pond will generally go down to about 39 degrees when the pond ices over.