Yes we did Rainman .. key was cut in down to ledgerock with a solid 3 foot ridge behind it .. all was filled with clay as well as the trench for the pipe we compacted the clay with the excavator to approximately 8 feet .. what your seeing in the above photos is fill going on top of the clay core .. good compactable fill about 50% clay base .. we planned on building about 80% then letting things settle for 4 or 5 days
