Teesta-III Hydroelectric Power Plant, Sikkim, India | 1,200 MW Facility

Teesta-III is a major hydroelectric power plant located in the state of Sikkim, India. With a capacity of 1,200 MW, it ranks among the largest hydropower facilities in the country. The plant harnesses the flow of the Teesta River, a significant watercourse in the eastern Himalayas, to generate clean electricity. The facility operates under India's regulatory framework for hydropower, which includes environmental clearance from the Ministry of Environment, Forest and Climate Change (MoEFCC) and compliance with the Dam Safety Act. The plant uses run-of-the-river technology, which minimizes reservoir size and reduces ecological disruption compared to storage dams. This technology is typical for Himalayan hydropower projects due to the steep gradients and high sediment loads. Teesta-III plays a crucial role in India's renewable energy mix, supplying power to the national grid and supporting the country's target of 500 GW of non-fossil fuel capacity by 2030. Its location in a seismically active region requires robust engineering and continuous monitoring to ensure safety and operational reliability.

The plant's location in the ecologically sensitive Eastern Himalayas requires careful management of downstream water flow and fish migration. Run-of-the-river design reduces habitat fragmentation but still alters natural flow regimes. The region's high biodiversity and forest cover necessitate stringent environmental monitoring to mitigate impacts on local ecosystems.