An increasing amount of power in the northwest is generated by wind. Michael Milstein, with the Bonneville Power Administration, says there are enough wind farms to power Portland and Seattle. He says “When all those are cranking out full power at full capacity, it’s roughly the equivalent of three nuclear plants.” That's 3000 megawatts of electricity and more wind farms are being built. Milstein says that when the wind isn't blowing, the hydropower system takes up the slack.