Can I leave a space for sewer drain when putting retaining wall up so, rock wont rest on top of soil where sump pump sewer pipe is?
Update with more detail:
My home has a sump pump that kicks the water out to a sewer pipe that leads underground to the back of my lot to a drain sewer. The backyard slopes so I had to dig out the area for my pool, and at the high side it was about 2ft. I am installing retaining wall blocks that are 6inches tall, 12 inches deep and 17 inches wide and hollow in the middle to be filled with crushed rock.
Because a 6 inches base is required, and minimum of 6 inches of the first row be burried, I needed to dig down another 12 inches. So I ran into this sewer pipe where I need to put the base rock, and it will sit up an inch or so higher than the base rock. I am looking to leave a small space when placing the base blocks so no weight will be directly on this pipe, and then just build the wall as usual. Is there anything I should be aware of, or is there something else I should be doing?
Currently I dug out the base and left the compacted clay covering the pipe on each side about 3 inches. Would it be better to dig out and expose the pipe within the base and just put the base rock all around it and try to tamp it as best I can? Or is it better to leave the compacted clay soil around it and work the base rock around the clay covering the pipe?