How to put a logo on plastic surface?

What depth should I put black corrugated plastic drainage pipe at?

• I need to improve surface drainage at my house. I bought some of the basins with grilles and pop-up drains, and a roll of 4" black corrugated plastic non-perforated pipe. I am trying to figure out what depth I should put the plastic pipe at though. This entire run that I want to do initially is down a steep hill. (I'm putting it in because the hill is getting eroded from surface drainage, and after this drain is in place, I can then add gutters and downspout drains from the house. I am worried about the corrugated pipe getting crushed from either too much pressure from dirt above it or from me walking over the surface when I mow the lawn. Is this a valid concern? Or do I have to do something special to protect it? This is not a high traffic area, since its on too steep of a hill to make the area usable for much, but I do have to mow it. I was planning on putting 2 of the 4" lines right next to each other, since I don't think one will be enough to handle the flow of water through this area. (when it rains, its like a small river because I'm getting a lot of runoff from higher properties, and my driveway is directing it all to one side of my house)

• Answer:

  you need a wider pipe, at least 6 inches,better 9. The pipe will have to be bedded in gravel or as Americans call it, river rock.Put a layer in the bottom of the trench, instal the pipe then cover with gravel by at least 3 inches, The bottom of the trench needs to be at least 24 inches deep