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Subansiri Upper Hydroelectric Project

Oct. 9, 2025

Hundreds recently protested in Daporijo, Arunachal Pradesh, against the proposed 2,000 MW Subansiri Upper Hydroelectric Project.

About Subansiri Upper Hydroelectric Project:

  • It is a 1,800 MW hydropower project.
  • It is a run-of-the-river project planned on the Subansiri River basin in Arunachal Pradesh.
  • It is expected to enter into commercial operation in 2031.
  • The project is being developed by KSK Upper Subansiri Hydro Energy and is currently owned by KSK Energy Ventures.
  • The gross head of the project will be 199.5 m.
  • The project is expected to generate 6,581.29 GWh of electricity. The project cost is expected to be around $2,346.87m.

Key Facts about Subansiri River:

  • It is a Trans-Himalayan river originating from the western part of Mount Porom (5059 m) in the Tibetan Himalaya. (Kangig glacier range in Tibet)
  • It is also called the Gold River, the Subansiri River is famous for its gold dust.
  • It enters into the plains of Assam through a gorge near Gerukamukh.
  • It is the right-bank tributary of the Brahmaputra. It joins the Brahmaputra River in the Lakhimpur district of Assam.
  • It flows through Assam, Arunachal Pradesh, and the Tibet Autonomous Region of China.
  • Tributaries: Major tributaries of the river are Laro, Nye, Yume, Tsari, Kamla, Jiyadhol, Ranganadi and Dikrong.

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