Flint has excavation contractors available for hire. Excavation is a process by which layers of soil are removed. The dirt or soil is relocated, and the ground leveled so that residential, commercial, utilities or infrastructural projects can be constructed on the site. Removing a considerable quantity of earth needs heavy machinery, such as backhoes, excavators and bulldozers. Projects that need excavation include basements, foundations, driveways, parking lots along with utilities. A contractor manages the machinery and the labor needed for the excavation. These contractors use experienced workers and technicians to operate the machinery and manage the excavation site safely and efficiently. The workers are also usually insured in Flint for their line of work. Excavation can be done for sewer rehabilitation and repair services. The contractor also needs to know the prevalent types of sewer systems, along with city codes and requirements in the area.