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Dartmouth Dam is a large rock-fill embankment dam with an uncontrolled chute spillway across the Mitta Mitta, Gibbo, and Dart rivers, the Morass Creek and a number of small tributaries. The dam is located near Mount Bogong in the north-east of the Australian state of Victoria. The dam's purpose includes irrigation, the generation of hydro-electric power, water supply and conservation. The impounded reservoir is called Dartmouth Reservoir, sometimes called Lake Dartmouth. The Dartmouth Power Station, a hydro-electric power station that generates power to the national grid, is located near the dam wall. A smaller pond, called the Dartmouth Dam Regulating Pond or Banimboola Pondage, approximately downstream of the main dam, also across the Mitta Mitta River, is located adjacent the Banimboola Hydroelectric Power Station and forms part of the Dartmouth Dam complex of facilities. ==Location and features== Designed by the State Rivers and Water Supply Commission of Victoria, construction commenced in 1973 and was completed in 1979 by Thiess Bros. Pty Limited, at a cost of 139 million. The embankment dam wall is constructed with an earth core and rock fill, rising to a height of from the lowest part of the foundation to the roadway across the top of the dam; making the dam wall the highest in Australia. The core component materials of the wall include of rock, of filter material made from crushed quarried rock, and of earth for the core.〔 The reservoir has a capacity of , or approximately 6.7 times the capacity of Sydney Harbour; and can release a maximum outflow of approximately per day in normal operation.〔(【引用サイトリンク】url=http://www.mdba.gov.au/what-we-do/managing-rivers/river-murray-system/dams-weirs/dartmouth-dam )〕 The crest of the uncontrolled spillway is and is approximately long. When full, flood flows spill over the crest and down an long concrete chute. The water then returns to the river via an open rock cascade which gradually widens to at river level. Once Dartmouth Reservoir reaches 99% capacity, it is considered to be 'operationally full' and releases are then set to pass inflows downstream to prevent the level rising further. Releases are passed through the outlet works and power station whenever possible and water will only flow over the spillway if significant flood inflows enter from upstream when the storage is close to full. This approach reduces the chance of downstream flooding, maximises operating flexibility for hydro-power generation and protects the spillway.〔 The Dartmouth Dam stores water from the Victorian "High Country's" snow fields for summer release into the Mitta Mitta (and the downstream Lake Hume) and subsequently into the greater Murray River for irrigation. The reservoir's inflow and outflow capacity is quite small considering its size, meaning that its levels vary little compared with some other dams on the Murray and their tributaries. The reservoir is a popular recreational trout fishery, being regularly restocked by the Victorian Department of Primary Industries. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Dartmouth Dam」の詳細全文を読む スポンサード リンク
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