Auger boring is a method used to create underground tunnels or boreholes. It involves a rotating helical screw, known as an auger, which excavates soil and rock as it advances. The excavated material is transported back to the surface through the auger's spiral design. This technique is commonly used for installing utilities like water and sewer lines, as well as for geotechnical investigations. Auger boring is favored for its efficiency and minimal surface disruption, making it suitable for urban areas where space is limited.