Subansiri Upper Hydroelectric Project
29 September 2026
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Mehnat Aapki, Guidance Humari
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Subansiri Upper Hydroelectric Project
The Subansiri Upper Hydroelectric Project (SUHEP) is a proposed 1,605 MW hydropower project on the Subansiri River in Upper Subansiri district of Arunachal Pradesh. It is being developed by NHPC Limited and is planned as a run-of-the-river project with storage, serving the twin purposes of power generation and flood moderation. The project is located near Menga/Pairijo, about 20–25 km from Daporijo.
The project envisages a dam about 237 metres high, with a reservoir extending roughly 50 km and covering about 22.2 sq km at full reservoir level. The Subansiri is a major right-bank tributary of the Brahmaputra and flows from the Tibetan region through Arunachal Pradesh into Assam.
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Subansiri Upper Hydroelectric Project: 1,605 MW hydropower on Brahmaputra tributary in Arunachal Pradesh. Environmental clearance status, ecological concerns, forest diversion and strategic importance explained.
Keywords
Subansiri Upper Hydroelectric Projecthydropower Arunachal PradeshNHPC LimitedBrahmaputra tributaryenvironmental clearanceforest diversionrun-of-river damclean energy transitionflood moderation