page_title: Shin-Takasegawa Pumped Storage Station
section_title: Design and operation
hierarchical_section_title: Shin-Takasegawa Pumped Storage Station / Design and operation
caption_attribution_description: Nanakura Dam (ja:七倉ダム) is a dam in Nagano, Japan. (This picture was retouched with a graphics editor, electric cables were hidden.)
context_page_description: The Shin-Takasegawa Pumped Storage Station uses the Takase River to operate a pumped storage hydroelectric scheme about 12 kilometres west of Ōmachi in Nagano Prefecture, Japan. Part of the system is within Chūbu-Sangaku National Park.
  Construction on the complex began in 1971, concluded in 1978 and the power station was commissioned in 1980. The power plant has a 1,280 megawatts installed capacity and its upper reservoir is created by the Takase Dam, a rock-fill dam — which at 176 metres in height is the tallest of its type in Japan.
  It is also the second tallest dam in Japan, next to Kurobe Dam.
context_section_description: When energy demand is low and therefore electricity less expensive, the turbines reverse and pump water from the lower reservoir back into the upper reservoir. This process repeats depending upon energy demand and water availability. Water released from the lower reservoir is used to power the Nakanosawa Power Station which uses 140.8 metres (462 ft) of hydraulic head to power a single 42 megawatts (56,000 hp) Francis turbine generator. It was commissioned in May 1980.
caption: The Nanakura Dam which creates the lower reservoir
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