I want to put in about 1/4 + mile of 1" PVC waterline and a residential electrical line to a new house and shop. This is a rural project, BTW.
Can they be in the same trench if separated by 12" (vertical) of soil? I have been unable to find a Nebraska code on it.
I would definitely mark the lines with ribbons along the top of each service before backfilling and make a drawing of the property as to the location of the line in case you ever sell it or something happens where you no longer are the owner. That drawing would be placed in a plastic sealed bag somewhere safe near the source's of each.