We removed an aboveground pool that was installed on a sloping lot. When installed, the high side of the hill was cut into, and the soil graded for the bottom was mixed with large washed stone and sand, and used to level the low end of the slope. This created a "retaining wall" that just went around the pool. Now there's a beautiful sand circle, all ready for the installation of a flat stone patio.
Do we need to make a "real" retaining wall? We're going to use plant material to deal with the cut in the high side of the slope and add some stairs, but will water draining through the site (instead of being covered by the pool), gradually destroy the soil wall on the low side? Thanks!!!