Hollowed into a South Carolina mountain 29 years ago, the engineering wonder Bad Creek hydroelectric plant supplies power to 850,000 homes. Duke Energy designed the hydroelectric plant inside a mountain below Lake Jocassee in the northwest part of South Carolina near the Blue Ridge Mountains. At the plant, a pumped-storage hydroelectric station uses the same water over and over again, making more efficient use of water resources. This is important because hydroelectric plants have been criticized in the past for disrupting the local ecosystem and adding pollutants to the local water sources. However, due to this technology, the Bad Creek hydroelectric plant is able to curtail most of these issues.
This ambitious project by Duke Energy is a huge contribution to the future sustainability of the state. According to a study looking at nearly 500 reservoirs worldwide by the International Hydropower Association, hydroelectric power has significantly lower median greenhouse emissions than coal and gas power plants, even when accounting for greenhouse emissions caused by construction.