811 - Free Utility Locating From planting trees to building a deck to putting in a fence—outdoor projects enhance your outdoor living space. Some projects we can do ourselves. For others, we call in the professionals. Blue Grass Energy encourages both weekend warriors and professionals who work outdoors to be safe and to be sure to avoid underground electrical hazards. To help you stay safe, use the national underground utility locating service for free by calling 811 two days prior to digging.