Some notable underground power stations are: •
Kazunogawa Power Station is a 1,200 MW underground pumped storage plant in
Japan. Kazunogawa consists of four 400 MW generation units. The cavern for the underground power station is below the surface. It is long by high and wide. The head is . •
Churchill Falls Generating Station,
Newfoundland and Labrador, Canada is the second largest underground power station in the world. It generates 5,428 MW from 11 turbines. The powerhouse is long, high, wide and located underground. The two tailrace tunnels are 1691.64 m long. The net head is 312.42 m. •
Kannagawa Hydropower Plant is a pumped-storage hydroelectric power plant near
Minamiaiki in
Nagano Prefecture and
Ueno in
Gunma Prefecture,
Japan. The power house is underground and measures long, wide, and high. It contains 6 x 470 MW pump generators for a total capacity of 2,820 MW with an effective
hydraulic head of and maximum discharge of . The first unit commenced operations in 2005, the second in 2012. •
Goldisthal Pumped Storage Station, in
Thuringia,
Germany, built in 1991-2004, generates 1,060 MW from 4 turbines. It is unique (for its scale) in Europe, in that two of the four motor generators are designed as variable speed asynchronous machines. The machine hall is long, high, wide, with a separate transformer cavern ( long, high, wide). •
Manapouri Power Station,
Fiordland,
New Zealand, built 1963-1972, generates 850 MW from 7 turbines. It is built underground, and has two 10 km tailrace tunnels. The net head is . The most notable feature of this station is that the lake and power station are located on the eastern side of the
Southern Alps, with the tailrace tunnels traveling under a major mountain range, discharging in
Doubtful Sound on the west coast. •
Boundary Dam Powerhouse, in
Pend Oreille County, Washington,
United States, completed in 1967 and diverting the Pend Oreille River through six units, Boundary Powerhouse produces 1070 MW. Owned and operated by
Seattle City Light. •
Chaira Hydro Power Plant,
Bulgaria, is the largest underground power station in the Balkans, built from 1980 to 1998. It has an installed capacity of 864 MW from four 216 MW reversible
Francis turbines with a net rated head of , and maximal speed of 600 rpm. •
Cruachan Dam,
United Kingdom, built in the early 1960s, a pumped storage plant generating 440 MW from 4 turbines. •
Dinorwig Power Station,
Llanberis,
United Kingdom, built in 1984, is a pumped-storage system, delivering 1,650 MW to Wales and the north-west of
England. It stands in Europe's largest man-made cavern. • Edward Hyatt Power Plant inside the
Oroville Dam,
United States, is in a cavern carved into the bedrock of the
Feather River canyon. It houses 3 Generator and 3 Pump/Generator units and their respective Transformers below the crest of the dam. •
Kariba hydro-electric power scheme (1,200 MW) is on the
Zambezi river, which forms the border between
Zimbabwe and
Zambia. The Kariba system comprises two underground power stations. The
Kariba South station in
Zimbabwe houses six 100 MW generators. The
Kariba North station in
Zambia houses four 150 MW generators. •
Paulo Afonso Hydroelectric Complex,
Brazil; The combined 4,279.6 Paulo Afonso I, II and III were built underground. Completed in 1955, PA I was Brazil's first underground power station. •
Poatina Hydroelectric Power Station,
Tasmania,
Australia, built in 1966-1977 it generates 300 MW with water provided by the
Great Lake, it is the largest underground power station in Australia. •
Raccoon Mountain Pumped-Storage Plant,
Chattanooga,
Tennessee,
United States, built in 1970-1978 generates 1,530 MW. It is an early test of the pumped-storage approach. •
Robert-Bourassa generating station,
Quebec, Canada, is the largest underground power station in the world. It generates 5,616 MW from 16 turbines with a net rated head of . •
Snoqualmie Falls Hydroelectric Plant in
King County, Washington,
United States, built in two stages, Plant 1, completed in 1899 was the world's first completely underground power station and is still used to provide power to the
Seattle area. The two power houses have a combined installed capacity of 53.9 MW. ==See also==