Public utility locating—like what you get when you call 811—only marks lines owned by utility companies, such as main electric, gas, or water lines up to the meter. Private utility locating, on the other hand, identifies underground lines that aren’t covered by public locators. This includes secondary electric lines, water or sewer laterals, propane lines, and data cables running beyond the meter or within private property. If you’re digging on residential, commercial, or agricultural land in Wisconsin, a private locator is essential for finding hidden lines that public services won’t mark—helping you stay safe and avoid costly damages.