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As of 2025, plans exist in the Democratic Republic of the Congo for the construction of a hydroelectric power station set to overtake the Three Gorges, [3] with an installed capacity of 39,000 MW. [ 4 ] [ 5 ] The Project is called Grand Inga and is planned to be realised on the lower Congo River . [ 6 ]
Hoover Dam's initial 1,345 MW power station was the world's largest hydroelectric power station in 1936; it was eclipsed by the 6,809 MW Grand Coulee Dam in 1942. [20] The Itaipu Dam opened in 1984 in South America as the largest, producing 14 GW , but was surpassed in 2008 by the Three Gorges Dam in China at 22.5 GW .
The largest hydroelectric power station is the Three Gorges Dam in China, rated at 22,500 MW in total installed capacity. After passing on 7 December 2007 the 14,000 MW mark of the Itaipu Dam , the facility was ranked as the largest power-generating facility ever built.
The following are lists of hydroelectric power stations based on the four methods of hydroelectric generation: List of conventional hydroelectric power stations, hydroelectric generation through conventional dams; List of pumped-storage hydroelectric power stations, hydroelectric generation through pumped-storage
The following page lists all pumped-storage hydroelectric power stations that are larger than 1,000 MW in installed generating capacity, which are currently operational or under construction. Those power stations that are smaller than 1,000 MW , and those that are decommissioned or only at a planning/proposal stage may be found in regional ...
The size of hydroelectric plants can vary from small plants called micro hydro, to large plants that supply power to a whole country. As of 2019, the five largest power stations in the world are conventional hydroelectric power stations with dams. [21]
Hydroelectric power stations in the Republic of Ireland (9 P) Hydroelectric power stations in Italy (1 C, 7 P) Hydroelectric power stations in Ivory Coast (5 P)
Inside the Robert-Bourassa generating station, in northern Quebec, the world's largest underground power station, with an installed capacity of 5,616 MW.. An underground power station is a type of hydroelectric power station constructed by excavating the major components (e.g. machine hall, penstocks, and tailrace) from rock, rather than the more common surface-based construction methods.