I'm constructing a short wall, approx. four feet high and ten feel long that is coming off of our new construction earth contact home. My question is reguarding the footer. I have a foundation drain running along side my foundation footer which consists of one inch clean rock and perforated drain pipe. How do I put a compacted base footer in there, I obviously dont want to mix base in with my clean rock and I'm afraid the clean rock will settle if I try compacting it. I've built several walls for customers, just never with this scenario.