Underground utility mapping is the process of identifying, documenting, and representing the location of buried utility infrastructure beneath the ground. It can include electric lines, gas lines, water pipes, sewer systems, telecommunications cables, fiber-optic lines, conduits, and other underground infrastructure. Mapping provides contractors, engineers, developers, and property owners with a clearer understanding of existing subsurface conditions.

Professional utility mapping can combine information from utility locating, GPR scanning, survey data, GPS/GIS technology, existing records, and field observations. Depending on the project requirements, detected utilities may be recorded with their approximate location, route, depth, utility type, and other relevant information. This data can then be organized into digital maps or project documentation for easier planning and reference.

Underground utility mapping is especially valuable before excavation, construction, infrastructure development, roadwork, trenching, and site improvements. Having organized information about buried utilities can help teams improve project planning, reduce the risk of utility conflicts, minimize unexpected delays, and support safer excavation operations. It also provides useful reference information for future construction, maintenance, and infrastructure management.