Hydroelectricity, or hydroelectric power, is electricity generated from hydropower. Hydropower supplies one sixth of the world's electricity, almost 4,500 TWh in 2020, which is more than all other renewable sources combined and also more than nuclear power. Hydropower can provide large amounts of low-carbon electricity on demand, making it a key element for creating secure and clean electricity supply systems. A hydroelectric power station that has a dam and reservoir is a flexible source, since the amount of electricity produced can be increased or decreased in seconds or minutes in response to varying electricity demand. Once a hydroelectric complex is constructed, it produces no direct waste, and almost always emits considerably less greenhouse gas than fossil fuel-powered energy plants. However, when constructed in lowland rainforest areas, where part of the forest is inundated, substantial amounts of greenhouse gases may be emitted.
The Catawba River is a major river located in the Southeastern United States. It originates in Western North Carolina and flows into South Carolina, where it later becomes known as the Wateree River. The river is approximately 220 miles (350 km) long. It rises in the Appalachian Mountains and drains into the Piedmont, where it has been impounded through a series of reservoirs for flood control and generation of hydroelectricity. The river is named after the Catawba tribe of Native Americans, which lives on its banks. In their language, they call themselves "yeh is-WAH h’reh", meaning "people of the river."
Lake Norman is the largest man-made body of fresh water in North Carolina. It was created between 1959 and 1964 as part of the construction of the Cowans Ford Dam by Duke Energy. Located in Iredell County, 40 miles north of Charlotte, Lake Norman State Park boasts the region's popular mountain biking trail system.
Mountain Island is an unincorporated community in eastern Gaston County, North Carolina, United States. Not to be confused with the Charlotte neighborhood of the same name in Mecklenburg County. It is approximately 3 miles (4.8 km) north of Mount Holly.
The Shoalhaven Scheme is a dual-purpose water supply and Pumped-storage Hydroelectricity scheme located on the South Coast region of New South Wales, Australia.
Lake Keowee is a man-made reservoir in the United States in the state of South Carolina. It was developed to serve the needs of power utility Duke Energy and public recreational purposes. It is approximately 26 miles (42 km) long, 3 miles (4.8 km) wide, with an average depth of 54 feet (16 m), and a shoreline measured at 300 miles (480 km) in total, and is approximately 800 feet (240 m) above sea level.
Mountain Island Lake is a lake northwest of Charlotte, North Carolina created in 1924 to coincide with the building of Mountain Island Hydroelectric Station. It is named after the mountain which appears as an island in the lake, and the surrounding area is identified by the lake's name. The shape of the lake follows the meander of the Catawba River's course, dammed near the Mount Holly Wastewater Plant. Full pond elevation is approximately 647.5 feet (197 m). The lake has around 3,281 acres (13 km2) of surface area and 61 miles (98 km) of shoreline.
Wellington Dam Hydro Power Station is a hydroelectric power station near Collie, Western Australia. It has one water turbine with a generating capacity of 2 megawatts (2,700 hp) of electricity. The Wellington Dam Hydro Power Station was one of three hydro power stations in Western Australia, with only the Ord River hydro still in operation. The dam was constructed in 1933 and enlarged in 1956, and the power station was built from 1954 to 1956 and commissioned on 3 July 1956. It was placed into care and maintenance in 2007.
Marshall Steam Station is a coal power plant located at 35°35′51″N80°57′53″W in Sherrills Ford, Catawba County, North Carolina, United States and owned by Duke Energy. Named for former company president E.C. Marshall, the station is located on Lake Norman and began commercial operation in 1965.
The Cheoah Dam is a hydroelectric dam located in Graham and Swain counties, North Carolina, on the Little Tennessee River between river miles 51 and 52. The Cheoah Development consists of a dam and powerhouse, the first of several constructed by the Tallassee Power Company, a subsidiary of Aluminum Company of America, in order to generate electricity to smelt aluminum in Alcoa, Tennessee.
The Oconee Nuclear Station is a nuclear power station located on Lake Keowee near Seneca, South Carolina, and has a power output capacity of over 2,500 megawatts. It is the second nuclear power station in the United States to have its operating license extended for an additional twenty years by the Nuclear Regulatory Commission (NRC).
The McGuire Nuclear Station is a nuclear power plant located about 17 miles (27 km) northwest of Charlotte, North Carolina, on the state's largest lake, Lake Norman. It is a 32,500-acre (13,200 ha) lake created in 1963 by Duke Power for the Cowans Ford Hydroelectric Station. The McGuire units use the lake's water for cooling.
According to the International Hydropower Association, Canada is the fourth largest producer of hydroelectricity in the world in 2021 after the United States, Brazil, and China. In 2019, Canada produced 632.2 TWh of electricity with 60% of energy coming from Hydroelectric and Tidal Energy Sources).
Hiwassee Dam is a hydroelectric dam on the Hiwassee River in Cherokee County, in the U.S. state of North Carolina. It is one of three dams on the river owned and operated by the Tennessee Valley Authority, which built the dam in the late 1930s to bring flood control and electricity to the region. The dam impounds the Hiwassee Lake of 6,000 acres (2,400 ha), and its tailwaters are part of Apalachia Lake. At 307 feet (94 m), Hiwassee Dam is the highest overspill dam east of the Mississippi River and is second only to Grand Coulee dam in the nation. At the time it was completed, it was the highest overspill dam in the world.
The Chamera Dam impounds the River Ravi and supports the hydroelectricity project in the region. It is located near the town of Dalhousie, in the Chamba district in the state of Himachal Pradesh in India. The reservoir of the dam is the Chamera Lake. Large part of its reservoir lies in Salooni sub-division of Chamba.
Hydroelectricity is, as of 2019, the second-largest renewable source of energy in both generation and nominal capacity in the United States. In 2021, hydroelectric power produced 31.5% of the total renewable electricity, and 6.3% of the total U.S. electricity.
The Koyna Hydroelectric Project is the second largest hydroelectric power plant in India, just after the Tehri Dam Project. It is a complex project with four dams including the largest dam on the Koyna River, Maharashtra, hence the name Koyna Hydroelectric Project. The project site is in Satara district.
The Bad Creek Hydroelectric Station is a pumped-storage hydroelectric power station located 8 miles (13 km) north of Salem in Oconee County, South Carolina. The 1,065 megawatts (1,428,000 hp) power plant is owned by Duke Energy and its last generator was commissioned in 1991. The power station generates electricity by shifting water between an upper and lower reservoir. The upper Bad Creek Reservoir was created by damming Bad Creek and West Bad Creek while Lake Jocassee serves as the lower reservoir. During periods of low energy demand, the four 266 megawatts (357,000 hp) Francis pump turbines pump water from Lake Jocassee which lies at an elevation of 1,110 feet (340 m) to the Bad Creek Reservoir at an elevation of 2,310 ft (704 m) through a 1 mile (1.6 km) tunnel. When energy demand is high, water is released back from Bad Creek Reservoir back down to the pump turbines which then operate as generators. After electricity is produced, the water is returned to Lake Jocassee. The process is repeated as needed, primarily with the facility serving as a peaking power plant.
Jocassee Dam is an embankment dam on the Keowee River, straddling the border of Pickens and Oconee counties in South Carolina in the United States. The dam forms Lake Jocassee, which is fed by the Toxaway, Thompson, Horsepasture and Whitewater Rivers, and serves primarily for hydroelectric power generation and flood control. The dam and reservoir are part of the Keowee-Toxaway Hydroelectric Project, owned and operated by Duke Energy.
Pinopolis Dam is a dam in Berkeley County, South Carolina.
