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The slope appears to be failing at the soil overburden / weathered shale interface. We drilled this site a few weeks again (in the middle of drought conditions) and the ground water at that time was 3 feet above the bedrock (near the weathered shale / bedrock interface).
I am reviewing alternative slope stabilization options for a failing 2:1 slope that is 30 feet high and about 100 feet in length. The 10 feet of soil overburden (silty, lean clay with gravel) is on top of about 20 feet of highly weathered shale which transitions into highly fractured shale with...
