One of the important items to check while designing any type of utility line is the amount of cover it currently has. Some designers set up rules sets to ensure pipe coverage. One thing I like to do to verify pipe coverage for storm and water lines is to create a simple pipe table. If you noticed below, I created a simple table that provides you with pipe name, pipe size, slope, min. cover, and max. cover. In addition, this table also tells me if a pipe was design incorrectly. Anyways, you don't have to do this but it can become very helpful in your design. Oh yeah, this table is dynamic, so it will update while you make changes.