Engineering Decisions in Construction of Underground Bases for Stockpiling of Petroleum

Many problems to be solved happened in the duration of the completion of the stockpiling bases for crude oil. The problems encountered were analyzed by a process of “questions”, “information” “judgement criteria”, “decision making”, “reconsideration of the decisions”, “actions”, and “verification”. The problems and the decision for them are briefly summarized and reviewed in this paper. The paper also includes the characteristics of the project, including the role of the third-secter corporation, paucity of information on underground construction, and the lack of precendents in Japan.