It is owned and operated by the Electric Power Development Company (J-Power).
It supplies a 380 MW hydroelectric power station that is also owned by J-Power.Lake Tagokura has a surface area of 995 hectares (2,460 acres) and a capacity of 494,000,000 cubic metres (1.74×1010 cu ft).
In order to facilitate the movement of construction material, the existing railway from Aizu-Wakamatsu to Aizu-Miyashita was extended to Aizu-Kawaguchi, and a light railway was built from there to the construction site.
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