The Koynanagar Dam is a significant earth-fill dam located on the Koyna River in the Satara district of Maharashtra, India. Constructed in 1964, it primarily serves the purpose of hydroelectric power generation, irrigation, and flood control. The dam creates the Koyna Lake, which is one of the largest artificial lakes in India. The dam has a total installed capacity of 1,960 megawatts, making it one of the largest hydroelectric projects in the country. It plays a crucial role in supplying electricity to the region and supports agricultural activities by providing irrigation water to nearby areas.