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.
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