The Koyna Dam is a major dam located in the Koyna River valley in the Satara district of Maharashtra, India. Completed in 1964, it is primarily used for hydroelectric power generation and irrigation. The dam creates the Koyna Lake, which is one of the largest artificial lakes in India. The Koyna Dam has a height of 196 meters and a length of 1,700 meters, making it one of the tallest dams in the country. It plays a crucial role in flood control and water supply for the surrounding regions, contributing significantly to the local economy and agriculture.