Overview
- NHPC declared the Commercial Operation Date for Unit‑2 (250 MW), initiating partial output at the Subansiri Lower project on the Assam–Arunachal border.
- Union Power Minister Manohar Lal inaugurated the unit virtually, marking the first commercial generation from what NHPC describes as India’s largest hydropower project.
- The run‑of‑the‑river scheme features a 116‑metre concrete gravity dam, a 442 million cubic metre flood cushion, and design elements aimed at grid resilience and flood moderation.
- Power from the project is intended for 16 beneficiary states, with free allocations to Arunachal Pradesh and Assam and 1,000 MW earmarked for the Northeast.
- Construction faced prolonged delays, including a 2011–2019 halt due to protests and legal scrutiny, and the estimated cost has risen from Rs 6,285 crore to about Rs 26,075 crore.