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The Jinsha River (the upper stream of Yangtze River) complex is the largest hydroelectric generating system currently under construction. It has three phases. Phase one includes four dams on the downstream of the Jinsha River. They are Wudongde Dam, Baihetan Dam, Xiluodu Dam, and Xiangjiaba Dam, with generating capacity of 10,200 MW, 16,000 MW ...
The construction of the hydropower system began in 1948. In 1957 and 1958, two units with a capacity of 37.5 MW each were commissioned in Vrutok HPP. A year later, RŠ°ven HPP (19.2 MW) and Vrben HPP (12.8 MW) were also put into operation, marking the completion of the first phase of the construction of the Mavrovo Hydroelectric System.
In 1947, diversion of the Savannah River and construction of a coffer dam began while the contract for the actual dam was awarded. The construction plant for the dam was also completed in 1947, containing equipment to create concrete that would be transported anywhere on the construction site via three-revolving gantry cranes with 124 ft. booms ...
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.
The first contract was between Rusumo Power Company Limited and a consortium of contractors that included a joint venture composed of CGCOC Group Limited and Jiangxi Water & Hydropower Construction Company Limited. This contract provides for the performance of civil works, including supply and installation of hydro-mechanical equipment. [10]
The dam is 181 m (594 ft) high, 2,335 m (7,661 ft) long and 115 m (377 ft) in width. Power is generated by 32 turbines rated at 700 MW, and two turbines rated 50 MW, which are used to power the facility itself. Construction of this dam commenced in 1994, and was completed in 2012, nearly two decades after it started.
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]
Hydropower technology and attitude began to shift in the second half of the 20th century. While countries had largely abandoned their small hydropower systems by the 1930s, the smaller hydropower plants began to make a comeback in the 1970s, boosted by government subsidies and a push for more independent energy producers. [56]