The Water Resources Development Public Corporation revised the 'Yodo-gawa River System Construction Implementation Basic Plan' and it was planned to construct the dam as a multipurpose dam based on the 'Water Resources Development Public Corporation Law' the same year.
水資源開発公団は「淀川水系水資源開発基本計画」の変更を行い、「水資源開発公団法」に基づく多目的ダムとして建設を同年より計画した。