DigSafe Before You Dig: Call 811 and Know What’s Below If you’re planning home improvement even as simple as planting a tree, you need to check what’s below. Whether you do it yourself or hire a professional, a safe job starts with a call to Dig Safe® at 811. State law requires you to notify Dig Safe for even small projects. The depth of utility lines vary, and there may be multiple utility lines in a common area. Call 811 to avoid utility service disruption to an entire neighborhood, harm to you and those around you, as well as fines and repair costs.