Section I General Remarks of Lifeline Services General Remarks Masanori Hamada Water Pipeline Systems Takeshi Koike Sewerage System Masanori Hamada Natural Gas Distribution System Nobuhisa Suzuki and Hiroyuki Horikawa Electric Power System Keizo Ohtomo and Yoshiharu Shumuta Telecommunication System Takanobu Suzuki, Fumihide Sugino, and Katsumi Sakaki Section II Construction Technology of Lifeline Pipelines and Its Facilities Construction Methods for Lifeline Systems Nobuhisa Suzuki and Hiroyuki Horikawa Water Pipeline Systems Takeshi Koike Sewerage System Masanori Hamada Natural Gas Distribution System Nobuhisa Suzuki and Hiroyuki Horikawa Electric Power System Keizo Ohtomo and Yoshiharu Shumuta Telecommunication System Takanobu Suzuki, Fumihide Sugino, and Katsumi Sakaki Section III Maintenance Technologies of Lifelines General Remarks Takanobu Suzuki Water Pipeline Systems Takeshi Koike Sewerage System Masanori Hamada Natural Gas Distribution System Nobuhisa Suzuki and Hiroyuki Horikawa Electric Power System Keizo Ohtomo and Yoshiharu Shumuta Telecommunication System Takanobu Suzuki, Fumihide Sugino, and Katsumi Sakaki Section IV Disaster Prevention and Mitigation Technologies of Lifelines General Takeshi Koike Water Supply Systems Takeshi Koike Sewerage Systems Junichi Koseki and Reiko Kuwano Natural Gas Distribution Systems Nobuhisa Suzuki and Hiroyuki Horikawa Electric Power System Keizo Ohtomo and Yoshiharu Shumuta Telecommunication System Takanobu Suzuki, Fumihide Sugino, and Katsumi Sakaki Index