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Eucumbene Dam
Eucumbene Dam is a major gated earthfill embankment dam with an overflow ski-jump and bucket spillway with two vertical lift gates across the Eucumbene River in the Snowy Mountains 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 Lake Eucumbene, the largest storage lake in the Snowy Mountains Scheme.
==Location and features==
Commenced in May 1956 and completed in May 1958, Eucumbene Dam is a major dam, located approximately northeast of the locality of Eucumbene Cove. The dam was constructed by a consortium comprising the Department of Public Works and Kaiser-Walsh-Perini-Raymond based on engineering plans developed by the United States Bureau of Reclamation and the Department of Public Works, under contract from the Snowy Mountains Hydroelectric Authority.〔 Construction of the dam inundated the original township of Old Adaminaby, which was relocated to Adaminaby in the 1950s, requiring approximately 800 people to be moved.〔
The outer walls of the dam are built of rock while the inner core is compacted, impervious clay. The earthfill embankment dam wall comprising of earth and rockfill is high and long. The foundation of the dam comprises closely jointed hard siltstone and quartzite with overburden of decomposed rock and slope-wash up to deep. A subsidiary embankment containing of fill across a low saddle in a ridge forms the left abutment of the dam wall. At 100% capacity the dam wall, with an elevation of AHD, holds back or () of water, approximately equal to nine times the volume of Sydney Harbour. The surface area of Lake Eucumbene is and the catchment area is . The overflow ski-jump and bucket spillway with two vertical lift gates is capable of discharging . The two gates, each wide by high were constructed during 1977-78 under a separate contract.
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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