Lower Subansiri Hydroelectric Project

Lower Subansiri Hydroelectric Project Latest News

India’s largest hydroelectric project, the 2000-MW Subansiri Lower Hydroelectric Project, has begun its commissioning phase.

About Lower Subansiri Hydroelectric Project

• It is a 2000 MW run-of-the-river hydro project being constructed on the Subansiri River, a tributary of the Brahmaputra.
• It is located at Gerukamukh on the Arunachal Pradesh–Assam border.
• It will be the single largest hydroelectric plant in India when completed.
• The project is being developed by the state-run National Hydro Power Corporation (NHPC).
• The construction of the project has been underway since 2005.
• The project cost was met through 70% equity and 30% debt financing by the provision of a term loan. The central government is providing budgetary support as part of the equity component.

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Lower Subansiri Hydroelectric Project Features

• It consists of a concrete gravity dam, which will be 116 m high from the riverbed level and 130 m from the foundation. 
• The length of the dam will be 284 m. The gross storage capacity of the reservoir will be 1.37 km3.
• The powerhouse will comprise eight Francis-type turbines capable of generating 250 MW of electricity each. 
• It will also have eight horseshoe-shaped headrace tunnels, eight horseshoe-shaped surge tunnels , and eight circular penstocks.
• A tailrace channel (35 m long and 206 mwide) will take the water discharged by the turbines back to the river.

Source: TOI