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Subansiri Lower Hydroelectric Project

Sector: Hydro • Location: Assam, Arunachal Pradesh, India

Source: INSIGHTS IAS

Project
Partially Operational

The Subansiri Lower Hydroelectric Project is a run-of-the-river hydropower project with an installed capacity of 2,000 MW, making it India's largest hydropower project once fully commissioned. Located in Gerukamukh on the Assam–Arunachal Pradesh border, it is built on the Subansiri River, the largest tributary of the Brahmaputra River. The project faced delays due to environmental impact studies,

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The project “Subansiri Lower Hydroelectric Project” is an infrastructure initiative in the Hydro sector, located in Assam, Arunachal Pradesh, India. Taiyo aggregates data on it from INSIGHTS IAS.

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partially operational

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Description

Description

The Subansiri Lower Hydroelectric Project is a run-of-the-river hydropower project with an installed capacity of 2,000 MW, making it India's largest hydropower project once fully commissioned. Located in Gerukamukh on the Assam–Arunachal Pradesh border, it is built on the Subansiri River, the largest tributary of the Brahmaputra River. The project faced delays due to environmental impact studies, seismic safety reviews, and public protests. The first 250 MW unit became operational in December 2025, with the remaining units scheduled for commissioning between 2026 and 2027.

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High

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