Amagase Dam
The is an arch dam on the Uji River just upstream from Uji, Kyoto Prefecture, Japan. The main purpose of the dam is flood control but it supports a hydroelectric power station and creates the lower reservoir for the Kisenyama Pumped Storage Plant. The dam itself serves a 92 MW power station while the pumped-storage power station upstream has a 466 MW capacity. Construction on the dam began in 1955 and it was complete in 1964. The pumped-storage power station became operational in 1970. Both plants are owned by Kansai Electric Power Company. Design. The dam  is a tall, long variable-radius arch type with structural volume of . The dam withholds a reservoir called of of which is active or "useful" storage. It has a surface area of . The dam's spillway consists of four x floodgates on its crest with a maximum discharge capacity of . In the middle of the dam body, there are three x gate-controlled orifice openings with a maximum discharge of . The dam's power station has a 92 MW installed capacity and a discharge capacity of . Kisenyama Pumped Storage Plant. Using Lake Hōō as the lower reservoir, water is pumped  up to the upper reservoir via two pump-generators. The upper reservoir is created by a rock-fill dam that is high, long and has a crest width of . The dam also has structural volume of and withholds a reservoir of of which is active storage. From the upper reservoir, water can be released back down to the power station where the two 233 MW reversible Francis turbine pump-generators use it for power production. This process can be repeated and generation usually occurs during peak usage periods. The high water level at the upper reservoir is above sea level  while it is ASL in the lower reservoir. This affords the power station an effective hydraulic head of . Its discharge capacity is . The first generator of the pumped-storage power station was operational in January 1970, and the second in July of that year. It has a maximum output of 466 MW.