How did underground utilities start?

Underground utilities began to emerge in the late 19th century as urban areas expanded and the need for efficient infrastructure grew. Initially, cities installed sewer systems to manage waste and sanitation, followed by water supply systems. The introduction of electricity and gas lines soon followed, leading to the underground installation of these utilities to maximize space and improve aesthetics in rapidly developing urban environments. This trend has continued to evolve, with modern technologies facilitating more efficient and safer underground utility systems.