NHPC Limited has commissioned two units of the 2,000 MW Subansiri Lower Hydroelectric Project (HEP), with the remaining units scheduled to be brought online in phases by December 2026, the government informed.
Located on the Subansiri River along the border of Arunachal Pradesh and Assam, the project comprises eight generating units of 250 MW each. Power from the commissioned units is already being supplied to beneficiary states.
Once fully operational, the project is expected to generate approximately 7,422 million units (MU) of electricity annually, significantly contributing to India’s renewable energy capacity. The project will also play a critical role in grid stability, providing peaking power support and helping balance intermittent renewable sources such as solar and wind energy.
In addition to power generation, the project is designed to offer flood moderation benefits in the Brahmaputra Valley, enhancing regional resilience to seasonal flooding.
Compliance and Safety Measures
The Subansiri Lower HEP has received all required statutory clearances related to environment and forest approvals. NHPC has also implemented riverbank protection and erosion control measures in downstream areas.
Dam safety is being ensured in line with the provisions of the Dam Safety Act, 2021, under the guidance of the National Dam Safety Authority (NDSA).
Community Development and Local Impact
NHPC has undertaken multiple initiatives to support local communities impacted by the project. During the construction phase, around 7,000 local workers have been provided employment.
The company is also implementing Corporate Social Responsibility (CSR) programmes across sectors such as education, healthcare, sanitation, skill development, and rural development. Additionally, livelihood initiatives have benefited approximately 5,000 women in the region.
The project has further contributed to infrastructure development, including roads and bridges, improving connectivity for nearby villages.
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