These markings mean a utility locate request has been called in for construction work that will be done on or near your property. Blue lines and flags indicate there is a buried water main or service in that area, while green lines and flags indicated buried sewer lines. Any time someone needs to make an excavation, they are required by the State’s NC811 law to make a request for all buried utilities to be located and marked prior to the performing the work. Requests may be made by calling 811, entering the information at the NC811 website or with their downloadable mobile application. This is a free service. Additional information on NC811 regulations and contacts for companies that perform locates on private lines may be found at NC811.org.