About Hydroelectricity

The Northern Pass transmission line will carry power from Hydro-Québec, the world's largest producer of hydroelectric energy, into New England’s electrical grid.

Hydroelectricity today provides about 7 percent of all renewable energy in the U.S., and is the largest source of renewable energy in the country. It is generated by a reusable force of water—from rivers, oceans, even reservoir-to-reservoir—that drives a turbine in a hydroelectric plant. The turbine then turns a generator rotor, which converts the energy into electricity.
About 99 percent of Hydro-Québec’s power is generated by hydroelectric facilities. The remaining 2 percent is generated by a mix of wind, thermal, and nuclear power facilities. With 62 hydroelectric-generating stations, as well as a wind farm, 27 reservoirs, and more than 668 dams and control structures, Hydro-Québec has an installed capacity and available supply totaling more than 40,000 megawatts (MW) of renewable power—more than all of New England’s power plants combined.

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