The Hydropower Improvement Act of 2013 is bipartisan legislation that aims to substantially increase the United States’ hydropower capacity in an effort to expand clean-power generation and spur domestic job creation. As the country’s largest source of renewable energy, hydropower allows us to avoid approximately 200 million metric tons of carbon emissions each year. According to the Department of Energy, the U.S. has the potential for 300 gigawatts of additional hydropower.