I'm not completely sure what you are asking. Are there holes in the wall or the ground? And what do you want to raise? What is St. Augustine?
There are holes between the retaining wall and the high side. If you were to walk to the retaining wall, the hole would be next to it, then the wall, then you step down to the lower part of the yard. Does that make sense? I am not sure I am explaining it well.
St. Augustine is a grass.
When I mow, the mower dips into the holes and causes portions of the grass to be cut closer than I would like.