The first reason for the preparation of this book is to share recent developments experienced in underground infrastructure technology with readers. It is the fact that innovative methods are becoming main route in underground piping constructions, renevations and rehabilitations. The second reason is to give awareness of trenchless technology in civil engineering and environmental engineering societies and world communities as well as the Turkish community. The development of new equipment and method and increased level of equipment sophistication and capabilities are driving forces of trenchless technology. A safe and successful trenchless project depends on skills, training and experience of operators, field personal and project inspectors. This book will be of use for all parties in a trenchless project as it provides planning, design, construction, inspection and project management concepts.