That sounds logical to me fish n chips. If the dam is "physically sound" and you cover the basin with clay even up the front of the dam, the clay should act like a bowl or rubber liner. The dam is just there to hold the clay bowl in place.

The down side to doing it that way would be that it would make the pond slightly smaller as the dam at water level would be thicker by the depth of the bowl material. Only likely a problem if the real-estate for the pond is very limited. Otherwise an equivalent amount of size could be added to the opposite side. Probably splitting hairs on this point.

A person could even use the clay bowl to be part of an erosion "bench" along the dam. My dam has an erosion bench to prevent wave erosion.

Last edited by snrub; 05/23/16 03:52 PM.
John

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