At the end of March 1999 I had a foundation poured. It sat for approximatly 4-5 days while we tarred and put in the perimeter drain. On April 1 1999 the excavating crew backfilled and blew our back wall in . It cracked in three places and was bowed in 2" in the middle of the 44 foot wall. The question that I have is how do i fix this problem. I live in vermont and am afraid of water problems. I also have a hill that starts to incline right behind the house.