Massanjore Dam is a hydropower generating dam over the Mayurakshi River located at Massanjore near Dumka in the state of Jharkhand, India. The Massanjore dam (also called Canada Dam ), across the Mayurakshi, was commissioned in 1955. It was formally inaugurated by Lester B. Pearson, Foreign Minister of Canada. The Mayurakshi River at the dam site has a catchment area of 1869 sq.km