Anyone else use watershed for a pond?
I'm looking for help on using the watershed from my hill to supply water to a wildlife pond. There would be no aeration or pump. I would like to make the pond about 100' X 40' with shallow edges for the birds, frogs, etc.
There is a "dry" pond now that the original owners dug out and build a berm around the backside (it is about 30' X 70'). It does fill up nicely in the spring but the previous owners put a drain in the berm so it eventually drains. I asked the original owner if it ever held water and he said they could never get it sealed, they tried clay and tar (yuck!).
So I'm thinking I need to fill in the existing pond and start over, partly because I would like to move the location of the pond. The dirt is excellent topsoil (which I am sure came off the hill!) so I am concerned that bentonite clay may not work. My other choice is to use a large pond liner with a foot or more of dirt on top. My concern is how to get the watershed to go into the pond instead of under the liner.
Anyone have any experience with this?