Thanks on the equipment list! I think my pond project will be similar to yours. I will have constant water coming in until I get to total depth and start sealing the sides.

I assume you packed in the bottom drain on your first pond and it is now holding tight?

I believe my springs will make my pond project wet during construction, but are not sufficient to fill the pond long term. Once the pond is full and begins to suffer evaporation losses, I believe the springs could never keep up over a longer time frame. Therefore, I believe I need to go your route and utilize a bottom drain during construction, then seal the sides and finally the bottom.

P.S. Thanks for the link. It was your Facebook group that someone had recommended.