The term “hydropower” covers a wide variety of technologies, ranging from large to small and old to new. Most commonly associated with the term are dams, which store water behind a generating facility and harnesses its power through one of many different types of turbines. This type of conventional hydropower project represents the vast majority of U.S. hydropower generation.

An profusion of new technologies have entered the market or seen major advances in recent years, including ocean wave, tidal and hydrokinetic power (tapping the power of flowing water, much like wind power does with moving air). For more information on different hydropower technologies, click here.