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The Hoover Dam in Arizona and Nevada was the first hydroelectric power station in the United States to have a capacity of at least 1,000 MW upon completion in 1936. Since then numerous other hydroelectric power stations have surpassed the 1,000 MW threshold, most often through the expansion of existing hydroelectric facilities.
Where a dam serves multiple purposes, a hydroelectric station may be added with relatively low construction cost, providing a useful revenue stream to offset the costs of dam operation. It has been calculated that the sale of electricity from the Three Gorges Dam will cover the construction costs after 5 to 8 years of full generation. [ 42 ]
[4] [5] The Project is called Grand Inga and is planned to be realised on the lower Congo River. [6] As of 2014, China is working on a 50,000 MW [7] dam as part of the Yarlung Tsangpo Hydroelectric and Water Diversion Project. Another proposal, Penzhin Tidal Power Plant, presumes an installed capacity up to 87,100 MW.
English: Hydroelectric dam. Water from the reservoir rushes through the penstock into the powerhouse. The water spins the turbine, which drives the generator. Inside the generator is a large electromagnet that spins within a coil of wire, producing electricity.
The amount of hydroelectric power generated is strongly affected by changes in precipitation and surface runoff. [4] Hydroelectric stations exist in at least 34 US states. The largest concentration of hydroelectric generation in the US is in the Columbia River basin, which in 2012 was the source of 44% of the nation's hydroelectricity. [5]
Yards Creek Generating Station is a pumped-storage hydroelectric plant in Blairstown and Hardwick Township in Warren County, New Jersey, United States. The facility is owned by REV Renewables, which purchased it from Public Service Enterprise Group and FirstEnergy in 2020 and 2021. [1] It has an installed capacity of 420 MW.
The Andekaleka Dam is a gravity dam on the Vohitra river near Andekaleka in eastern Madagascar.The primary purpose of the dam is hydroelectric power generation and it diverts water from the Vohitra east into a 4 kilometres (2.5 mi) headrace tunnel where it reaches a 91 megawatts (122,000 hp) underground power station.
The project is owned and operated by Seattle City Light to provide electric power for the City of Seattle and surrounding communities. In 2012, hydro-electric dams provided approximately 89.8 percent of the electricity used in Seattle. [2] The Skagit Hydroelectric Project alone accounts for about 20 percent of Seattle City Light's electricity.