The Hirakud Dam is a composite structure of earth, concrete and masonry. Ten km north of Sambalpur, it is the longest major earthen dam in the world, measuring 24 km including dykes, and stands across the river Mahanadi. The main dam has an overall length of 4.8 km spanning between two hills; the Lamdungri on the left and the Chandili Dunguri on the right. The dam is flanked by 21 km earthen dykes on both the left and right sides, closing the low saddles beyond the adjoining hills. The dam and dykes together measure 25.8 km. It also forms the biggest artificial lake in Asia, with a reservoir holding 743 km² at full capacity, with a shoreline of over 639 km. There are two observation towers on the dam one at each side. One is "Gandhi Minar" and the other one is "Nehru Minar". Both the observation towers present breathtaking views of the lake.Purpose and Benefits In the upper drainage basin of the Mahanadi River, centered on the Chattisgarh Plain, periodic droughts contrast with the situation in the lower delta region where floods may damage crops. The dam was constructed to help alleviate these problems by creating a reservoir and controlling river flow through the drainage system.The dam regulates the flow of the Mahanadi River and produces hydroelectricity through several hydroelectric plants. Chiplima has gained prominence as the second hydroelectric project of the Hirakud Dam. A natural fall of 80 to 120 feet (25 to 40 m) in the river Mahanadi is used to generate electricity. The place is mostly inhabited by fisherman, whose deity ghanteswari is very popular in the neighbouring area. The State Livestock Breeding Farm and Agricultural Farm are located here.People affected by the dam construction