The data shows the world's biggest hydroelectric dams as of 2017, based on generating capacity. During this year, one of the biggest hydropower facilities was located along the Columbia River in Washington, United States; it had a generating capacity of 6.81 gigawatts.
Three Gorges Dam – additional informationChina is by far one of the strongest supporters of hydroelectric energy in the world. It is one of the cheapest energy facilities to maintain due to low operation costs. In the U.S., the average expense for operating a hydroelectric power plant was about 8.
