On Mon, 30 Jul 2007 23:51:08 CST, TahoeKid wrote:

I guess my question is how to keep the sand from shifting once the
basic liner and rock are in place.
Rocks? Concrete ? Topsoil ? Lots of vegetation?

Retaining wall stones around the perimeter and level out the area?
If water doesn't rush over, or get under the sand it isn't likely to
move once it has been soaked and settled into place.

Regards,

Hal