Matanoagawa Dam

The Matanoagawa Dam (俣野川ダム) is a concrete gravity dam on a tributary of the Hino River located 2.3 km (1 mi) south of Kōfu in Tottori Prefecture, Japan. Construction on the dam began in 1978 and it was complete in 1984. The primary purpose of the dam is hydroelectric generation and it creates the lower reservoir for the Matanoagawa Pumped Storage Power Station (俣野川発電所). It is 69.3 metres (227 ft) tall and creates a reservoir with a 7,940,000-cubic-metre (6,440 acre⋅ft) storage capacity. The power station is located on the southern bank of the reservoir and contains four 300 megawatts (400,000 hp) Francis pump-turbine-generators. The upper reservoir for the pumped-storage scheme is created by the Doyo Dam located 6 kilometres (3.7 mi) to the southeast in Okayama Prefecture. To generate power, water from the Doyo Dam is sent to the power station, used to generate electricity and then discharged into the Matanoagawa Reservoir. This occurs when energy demand is high and when it is low, water is pumped back up to the Doyo Dam as stored energy. The same pump-generators that pump the water to Doyo reverse and generate electricity when it is sent back down. The first generator was operational in 1992 and the last in 1996.[2]

Matanoagawa Dam
Location of Matanoagawa Dam in Japan
CountryJapan
LocationKōfu
Coordinates35°14′44″N 133°29′30″E
StatusOperational
Construction began1978
Opening date1984
Owner(s)Chugoku Electric Power Company
Dam and spillways
Type of damConcrete gravity
ImpoundsHino River tributary
Height69.3 m (227 ft)
Length185 m (607 ft)
Dam volume165,000 m3 (216,000 cu yd)
Reservoir
Total capacity7,940,000 m3 (6,440 acre⋅ft)
Active capacity6,700,000 m3 (5,400 acre⋅ft)
Catchment area48.9 km2 (18.9 sq mi)
Surface area41 ha (100 acres)
Power Station
Commission date1992-1996
Turbines4 x 300 MW (400,000 hp) Francis pump-turbines[1]
Installed capacity1,200 MW (1,600,000 hp)

See also

References

  1. "Pumped-Storage Hydroelectric Plants in Japan". IndustCards. Archived from the original on 3 January 2013. Retrieved 26 January 2012.
  2. "Matanoagawa Dam" (in Japanese). Dam Net. Retrieved 26 January 2012.
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