Facts about Hydropower - UWSP
www.uwsp.edu › cnr-ap › KEEPFacts about Hydropower Facts about Hydropower Introduction Humans have used water as source of power for thousands of years. Civilization’s earliest machines were waterwheels for grinding grain. The earliest reference to hydropower is in China between 202 BC and 9 AD. Later, waterwheels were adapted to drive sawmills, pumps, and bellows and to provide