Kannagawa Hydropower Plant

Kannagawa Hydropower Plant
The upper Minamiaiki Dam
CountryJapan
LocationNagano Prefecture and Gunma Prefecture
Coordinates36°00′18″N 138°39′09″E / 36.00500°N 138.65250°E / 36.00500; 138.65250
StatusIn partial operation
Opening dateUnit 1: 2005
Unit 2: 2012
Units 3-6: 2032[1][2]
Owner(s)Tokyo Electric Power Company
Upper reservoir
CreatesMinamiaiki Reservoir
Total capacity19,170,000 m3 (15,540 acre⋅ft)
Lower reservoir
CreatesUeno Reservoir
Total capacity18,400,000 m3 (14,900 acre⋅ft)
Power Station
Hydraulic head653 m (2,142 ft)
Pump-generatorsFrancis pump turbine
Operational: 2 x 470 MW
Under constr.: 4 x 470 MW
Installed capacity2,820 MW (3,780,000 hp)

The Kannagawa Hydropower Plant (神流川発電所) is an under construction pumped-storage hydroelectric power plant near Minamiaiki in Nagano Prefecture and Ueno in Gunma Prefecture, Japan. The power plant utilizes the Minamiaiki River along with an upper and lower reservoir created by two dams, the upper Minamiaiki Dam and the lower Ueno Dam. The power station in between the two dams will contain six 470 megawatts (630,000 hp) pump-generators for a total installed capacity of 2,820 megawatts (3,780,000 hp). Unit 1 commenced commercial operation in 2005 and Unit 2 in 2012.[3] When completed, the plant will have the third-largest (after Fengning Pumped Storage Power Station and Bath County Pumped Storage Station) pumped-storage power capacity in the world.[4][5]

  1. ^ "Operational Commencement of Unit 2, Kannagawa Hydroelectric Power Station". TEPCO. 7 June 2012. Retrieved 22 May 2021.
  2. ^ "Kannagawa Hydroelectric Power Station" (PDF). TEPCO. 7 June 2012. Retrieved 22 May 2021.
  3. ^ HydroWorld: Unit 2 online at Japan's Kannagawa pumped-storage plant
  4. ^ Cite error: The named reference press was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference powmag was invoked but never defined (see the help page).

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