Trenchless technology is a family of construction techniques for installing or rehabilitating underground infrastructure with minimal disruption to surface traffic, businesses, and residents.  It also includes technologies for inspection, leak location, and leak detection with minimal disruption and minimal excavation from the ground surface.  (NASTT HDD Good Practices Guidelines) Trenchless technology is a progressive civil engineering process for the installation, replacement, or renewal of underground utilities with no (or minimal) excavation and surface disruption. These innovative methods have been utilized successfully for all underground utilities including water mains, storm and sanitary sewers, gas mains, electrical conduits, and fiber optics conduits. When employed in urban areas, substantial benefits are realized including dramatically reduced disruption to vehicular and pedestrian traffic, to business activities, to residential areas, and to environmentally sensitive areas. Trenchless technologies are the premier crossing options for major roads, railways, waterways as well as natural or manmade structures. In most cases, trenchless techniques will demonstrate significant cost saving benefits for municipalities and utilities over traditional open trench methods. Recent advancements in robotics have allowed trenchless technologies to provide pipe condition diagnostics never before available permitting utility owners to more accurately identify infrastructure priorities.