hillside slipping away
My back yard is a steep slope. A year and a half ago after a six inch rain storm it literally started slipping away, not eroding but the top soil sliped down the hill and I ended up with a six foot cliff which kept creeping closer to my house. I waited a year and a half and then had it filled, graded and seeded. Well 2 weeks ago we had another six inch rain and it is starting again. When it dries out the soil is very hard but when it rains the soil is literally saturated. I had drain pipes from my down spouts and adjoining parallel covered perforated drain laid under ground but no help. any ideas? Thanks.