Shri Manohar Lal Inaugurates Commercial Operation of the First Unit of Country's Largest Hydropower Project

Shri Manohar Lal, the Union Minister of Power, has inaugurated the commercial operation of Unit–2 (250 MW) of the Subansiri Lower Hydroelectric Project, India’s largest hydropower project with an installed capacity of 2000 MW. This development is significant for UPSC aspirants, particularly for GS Paper 3, focusing on energy security and environmental management. Last Updated: 2025-12-27

Key Facts About Subansiri Lower Hydroelectric Project

• Inauguration by Shri Manohar Lal, Union Minister of Power.
• Unit–2 (250 MW) of the Subansiri Lower Hydroelectric Project inaugurated.
• Project has an installed capacity of 2000 MW.
• Located at Gerukamukh on the Assam–Arunachal Pradesh border.
• Approved in 2003 and implemented by NHPC Limited.
• Strategically important for water management and flood control.
• Supplies power to 16 beneficiary states.
• Provides free power to Arunachal Pradesh and Assam.
• Features a 116-metre-high concrete gravity dam.
• Helps reduce downstream flooding with a flood cushion of 442 million cubic metres.
• Showcases India’s heaviest hydro generator rotors and largest inlet valves.
• Expected to generate approximately 7,422 million units of renewable electricity annually.
• NHPC invested around ₹155 crore in CSR initiatives.
• Project enhances national grid resilience and contributes to renewable energy.
• Completion of remaining units expected by 2026-27.
• Promotes sustainable development and local community benefits.

India's Renewable Energy Expansion

The Subansiri Lower Hydroelectric Project is a cornerstone in India's renewable energy strategy, aligning with the country's commitment to increase its renewable energy capacity. This project not only supports India's energy security but also aids in achieving its climate goals by reducing carbon emissions. With an annual generation of approximately 7,422 million units of electricity, it positions India competitively on the global renewable energy stage.

Related Government Schemes/Policies

• National Hydroelectric Power Corporation (NHPC): Implements and manages hydropower projects across India.
• National Action Plan on Climate Change (NAPCC): Aims to promote sustainable development and reduce greenhouse gas emissions.
• Integrated Power Development Scheme (IPDS): Enhances power distribution networks and improves electricity supply.

UPSC Relevance

• GS Paper 1: Geography - Impact of hydropower projects on regional development.
• GS Paper 2: Governance - Role of government in infrastructure development.
• GS Paper 3: Environment and Energy - Renewable energy initiatives and flood management.
• Prelims: Facts about the Subansiri Lower Hydroelectric Project, NHPC, and energy targets.
• Mains: Analytical themes on energy security, sustainable development, and climate change mitigation.

FAQ Section

• What is the Subansiri Lower Hydroelectric Project?

  The Subansiri Lower Hydroelectric Project is India’s largest hydropower project with an installed capacity of 2000 MW, located on the Assam–Arunachal Pradesh border.

• Why is the Subansiri Lower Hydroelectric Project important?

  It is crucial for energy security, flood management, and contributes significantly to India's renewable energy goals, generating approximately 7,422 million units of electricity annually.

• What are the key features of the Subansiri Lower Hydroelectric Project?

  The project features a 116-metre-high concrete gravity dam, India’s heaviest hydro generator rotors, and provides free power to Arunachal Pradesh and Assam.