The Maithon Dam is located at Maithon, 48 km from Dhanbad, in the state of Jharkhand. It is 15,712 ft (4,789 m) long and 165 ft (50 m). high.This dam was specially designed for flood control and generates 60,000 kW of electric power. There is an underground power station, the first of its kind in the whole of South East Asia. The dam is constructed on the Barakar River. The lake is spread over 65 square kilometres (25 sq mi).