The Tianlun Branch of the Dajia Power Plant is the administrative and remote control center of each power plant in the Dajiaxi River Basin. Due to the steep slope of the Dajia River and many passes, in Showa 17 (1942), the Land and Resources Bureau of the Taiwan Governor's Office formulated the "Dajia River Development Project" and planned to build a weir on the upper reaches of the Dajia River to store water for development and to meet the goals of providing water for agricultural irrigation and industrial water usage through power generation and flood regulation. Among them, Taiwan Electric Power Co., Ltd. set up 6 power generation fortifications downstream of the barrier for generating power. The other facilities, such as transportation, are the responsibility of the land bureau. However, the plan was interrupted by the defeat of Japan. After the war, the nationalist government followed the Japanese plan, and this power development plan was still centered on Dajian, with 6 power plants including Dajian, Qingshan, Guguan, Tianlun, Maan, and Shigang.
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