"TahoeKid" wrote in message
ps.com...
I am planning a "stream-leading-to-pond" in an area behind a retaining
wall in sloping, very sandy conditions. Like making a stream and pond
on a sand dune. My plan is to super saturate the soil with water to
make it stay put while I dig out the forms for the top resivour,
stream and pond. My biggest concern is the easily shifting soil and
was just wondering if anyone has any experience in working with that
environment.

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?

Soil has a natural angle of repose, and will stand at that angle without
support. If you want the sides to be steeper than that, then you need some
sort of structure. The structure can be concrete block, concrete, treated
wood, or railroad ties. Without the structure, everytime you walk near the
edge, some of the soil is going to move toward the pond, lowering the edge.