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An additional defining feature of small hydro is known as run-of-river, or that the physical impact of the project is relatively minuscule compared to major hydroelectric dams which require a water storage lake. Little water is stored behind the project, if at all, and the river is usually able to continue flowing.
The Hoover Dam in Arizona and Nevada was the first hydroelectric power station in the United States to have a capacity of at least 1,000 MW upon completion in 1936. Since then numerous other hydroelectric power stations have surpassed the 1,000 MW threshold, most often through the expansion of existing hydroelectric facilities.
At the time it was by far the largest hydroelectric plant in the state. [1] In 1924 it was rebuilt as a 60 cycle plant with 15,000 kilowatts (up from the original 10,500 kW). [2] In 1957 it was raised to regulate the flow from the larger Buford Dam, 36 miles (58 km) upstream, in order to give Atlanta water during the hours it was needed most. [3]
The concrete spillway portion contained three gates and formed the John C. Boyle Reservoir. Fish screens, fish ladder, and related features were also present at the site. [4] The dam produced power at peak times, meaning sometimes it produces electricity and returns water to the river; other times only a small amount of water is returned to the ...
A small station was also installed on Lake Tekapo, but although it has a small dam to raise the pre-existing lake, water was taken through a 1.6 km (1 mi) tunnel to a powerstation below the level of the lake. In the 1960s, work was started on the Upper Waitaki project.
These two stations are connected to the National Electricity Market via the TransGrid 330 kV Murray Switching Station (and the 330/132 kV substation for Guthega Power Station, Jindabyne Pumping Station & Jindabyne Dam Wall Mini Hydro Power Stations), 1.56 km (0.97 mi) south-east of Khancoban.
The Colley Wobbles Power Station is a hydroelectric power facility located approximately 30 km east of Dutywa in the Amathole District Municipality of the Eastern Cape of South Africa. Water is drawn from behind a dam on the Mbhashe River and diverted through a penstock to the Colley Wobbles Power Station. The power station discharges into the ...
Chatuge Dam is a flood control and hydroelectric dam on the Hiwassee River in Clay County, in the U.S. state of North Carolina.The dam is the uppermost of three dams on the river owned and operated by the Tennessee Valley Authority, which built the dam in the early 1940s for flood storage and to provide flow regulation at Hiwassee Dam further downstream. [1]