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Tehri Hydropower Complex – 2,400MW
Tehri Dam in Uttarakhand, the highest hydroelectric power project in the country. Commissioned in 2006, first construction began in 1978 helped by technical collaboration from the former USSR.
Located at the confluence of the Bhagirathi and the Bhilangana rivers, near the city of Tehri, the dam is a multi-purpose rock and earth-filled embankment dam, and at 260.5 metres is the tallest in India. With a maximum planned capacity of 2,400MW, the Tehri Hydropower Complex consists of the Tehri Dam and the Tehri Pumped Storage Hydroelectric Power Plant, and also includes the 400MW Koteshwar Dam.
Koyna Hydroelectric Project – 1,960MW
Located near Patan, in Maharashtra’s Satara district, close to the Koyna River, the Koyna Hydroelectric Project is India’s largest completed hydroelectric power plant with a capacity of 1,960MW.
Owned and operated by MAHAGENCO and Maharashtra State Power Generation, the Koyna Project has four dams, the largest of which is constructed across the Koyna River.
As the dam is located in the Western Ghats mountain range, all the generators of the power plant have been installed deep inside the mountains requiring extensive excavation works.
Construction began in 1954, and the project has been developed in four stages.
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Srisailam Dam – 1,670MW
Nathpa Jhakri Dam – 1,530MW
Nathpa Jhakri Dam – 1,530MW
Owned by the Government of Andhra Pradesh via operator Federal Power Ltd, Srisailam Dam is located on the Krishna River in the Nallamala Hills near Srisailam temple, which falls under the districts of Kurnool and Mahabubnagar.
Both these districts are situated at the border of the two states of Andhra Pradesh and Telangana, respectively.
Construction of the dam began in 1960, but took more than two decades for completion, being unveiled only in 1981.
With a length of 512 metres and a height of 145 metres, plus 12 radial crest gates, Srisailam Dam is considered to be India’s third-largest working hydroelectric power project. It has a reservoir measuring 616 square kilometres.
Nathpa Jhakri Dam – 1,530MW
Nathpa Jhakri Dam – 1,530MW
Nathpa Jhakri Dam – 1,530MW
Himachal Pradesh’s Nathpa Jhakri Dam, with a capacity to generate 1,530MW of electricity, ranks fourth in this list.
This concrete gravity dam, which is 185 metres long and more than 67 metres high, was constructed across the Satluj River in Kinnaur district’s Nathpa village.
Operated by Federal Power Ltd , the dam is powered by six 250MW Francis-type turbines.
Started in 1993, construction of the dam was completed in 2004 to make Nathpa Jhakri India’s biggest underground hydroelectric power project.
Nathpa Jhakri also has the county’s largest de-silting chambers, the largest and longest headrace tunnel, the largest and deepest surge shaft.