i know that this will probably sound pretty stupid but i am creating a landscape bed around a power box. i have called and the utility guys are going to mark where the lines are. Basically all i am worried about is taking up the grass that is presently there. I was wondering how deep the power lines, gas lines etc. are. If i know then i won't worry as much seeing that it is my first time creating a landscape bed around a power box. Thanks in advance.