Electricity is the proven home energy safety leader, but you still have to be careful around it.
Colorado SB 93-155 requires that anyone that engages in any type of excavation must provide advance notice to the underground facility owners. The notice must be at least two business days, not including the day of the call prior to excavation.
Before you begin any type of excavation, you must notify the Utility www.uncc.org. Watch out for overhead lines with backhoes and other tall equipment. Call 811 before you dig!