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Happy Jacks Dam
Happy Jacks Dam is a major ungated concrete gravity dam across the Tumut River in the Snowy Mountains region of New South Wales, Australia. The dam's main purpose is for the generation of hydro-power and is one of the sixteen major dams that comprise the Snowy Mountains Scheme, a vast hydroelectricity and irrigation complex constructed in south-east Australia between 1949 and 1974 and now run by Snowy Hydro.
The impounded reservoir is called the Happy Jacks Pondage that is fed by the Tumut River. Immediately downstream of the dam wall, Happy Jacks Creek forms its confluence with the Tumut River.〔(【引用サイトリンク】title=Map of Happy Jacks River, NSW )〕〔(【引用サイトリンク】title=Map of Happy Jacks Pondage, NSW )〕
==Location and features==
Completed in 1959, Happy Jacks Dam is a major dam, located within the Tumbarumba Shire. The dam was constructed by a consortia comprising Kaiser-Walsh-Perini-Raymond based on engineering plans developed by the United States Bureau of Reclamation under contract from the Snowy Mountains Hydroelectric Authority.〔
The dam wall comprising of concrete is high and long. At 100% capacity the dam wall holds back of water. The surface area of Happy Jacks Pondage is . The uncontrolled spillway is capable of discharging .
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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