Protect your family and friends while doing simple digging in your yard. Have your local utility companies locate their underground lines. It's Free! Get more information about your private lines Montana811.org Know what's below. Call 811, or Click before you dig. Protect your family and friends while doing simple digging in your yard. Have your local utility companies locate their underground lines. It's Free! Get more information about your private lines Montana811.org Know what's below. Call 811, or Click before you dig.