The Niagara River is the greatest source of hydroelectric power. It is home to several hydro-power plants. Two of the more famous hydro-dams on the Canadian side are the Sir Adam Beck I and II. They were named, of course, after Sir Adam Beck, the first head of the Hydro-Electric Power Commission. They produce over 2 million kW of power. Because of the plants, during the East Coast Blackout in the summer of 2003, Niagara Falls and area still had power.

There are 14m (45 ft) diameter tunnels ...