Explanation:

1)  Hirakud Dam is built across the Mahanadi River, about 15 kilometres (9.3 mi) from Sambalpur in the state of Odisha in India. Behind the dam extends a lake, Hirakud Reservoir, 55 km (34 mi) long. It is one of the first major multipurpose river valley projects started after India's independence.
2)  Gangrel Dam, also known as the R.S. Sagar Dam, is located in Chhattisgarh, India. It is built across the Mahanadi River. It is located in Dhamtari district, about 15 km from dhamtari and about 90 km from Raipur. It is the longest dam in Chhattisgarh. This dam supplies year round irrigation, allowing farmers to harvest two crops per year. The dam also supplies 10 MW of hydro-electric power capacit
3)  Dudhawa Dam is located in Dhamtari district of Chhattisgarh in India. The construction of the dam began in 1953 and finished in 1964. It is built across the Mahanadi river in the village of Dudhawa, 21 km from Sihawa and 29 km from Kanker. The height of the dam is 24.53 m and the length 2,906.43 m. The reservoir has a catchment area of 625.27 km2