Yes, the utilities need to be located before you start digging. You can call the Digger's Hotline by dialing 811 from your cell phone or 800-331-5666 from a landline phone. You can also email them firstname.lastname@example.org. The underground utilities will be located at no charge when you call the Digger's Hotline. The underground lines will be marked with paint or flags. Red = Electric Lines; Yellow = Gas Lines; Blue = Water Lines; Green = Sewer Lines.