Mettur Dam Hydroelectric Power Plant, Tamil Nadu, India

Mettur Dam is a hydroelectric power plant located in Tamil Nadu, India, with a capacity of 250 megawatts. It is an operational facility that harnesses the flow of the Kaveri River to generate electricity, contributing to the region's renewable energy portfolio. The plant operates under India's regulatory framework for hydroelectric projects, which includes environmental clearances from the Ministry of Environment, Forest and Climate Change. The 250 MW capacity places it in the medium-to-large scale for hydroelectric plants in India, where typical capacities range from small run-of-river projects to large dams exceeding 1,000 MW. As a hydroelectric facility, Mettur Dam provides low-carbon electricity to the grid, supporting India's goals for renewable energy expansion. Its operation also aids in water management for irrigation and flood control in the Kaveri basin, highlighting its multi-purpose role in the region.

Hydroelectric power generation at Mettur Dam involves damming the Kaveri River, which can alter local aquatic ecosystems and sediment flow. The reservoir may affect fish migration and downstream water quality. However, as a renewable energy source, it displaces fossil fuel-based generation, reducing CO2 and air pollutant emissions. The plant's location in a populated area of Tamil Nadu requires careful management of water releases to balance power generation with agricultural and domestic water needs.