When I bought the house, there was some deterioration on the block in the basement, but I was told the problem was repaired. We recently had several large rains, and the basement is dry as a bone, but I noticed the land in front of my house slightly sinking? Does this just need to be backfilled because the grade is almost level now, or negatively sloped? What should I be looking for? When I level the cement sidewalk in front, what would be the best way, lift one side, and toss some dirt under it?