811
811 is a nationally recognized call-before-you-dig phone number in the United States. Its primary purpose is to facilitate the safe excavation of underground utilities. When someone plans to dig, whether for a small landscaping project or a large construction job, dialing 811 connects them to a local one-call center. This center then notifies the relevant utility companies, such as those for electricity, gas, water, and telecommunications, that are operating in the vicinity of the proposed digging site.
These utility companies then dispatch trained professionals to mark the approximate location of their underground lines