Long before wind and solar became viable sources of renewable energy, water was flowing through dams and creating power. Now, after decades of hydropower leading the country in electricity generating capacity among renewable sources, wind energy blew past it last year after several years of remarkable growth. According to new data from the U.S. Energy Information Administration, 8,727 megawatts (MW) of new wind capacity came online in 2016, bringing total installed capacity to 81,312 MW compared to 79,985 MW of hydroelectric generating capacity.