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Scrivener Dam, a concrete gravity dam that impounds Molongolo River, is located in Canberra, Australian Capital Territory, Australia. The dam creates Lake Burley Griffin, that was established for recreational and ornamental purposes. Named in honour of surveyor, Charles Scrivener, the dam was officially inaugurated on and the official filling of the lake commemorated on , by the Prime Minister, Robert Menzies. The dam wall is located on Lady Denman Drive and is adjacent to the National Zoo & Aquarium and a viewing area for the official residence of the Governor-General of Australia. ==Technical details== Scrivener Dam, designed in Germany, holds back the waters of the Molongolo River within Lake Burley Griffin. About of concrete was used in the construction of the dam wall. The dam is high and long with a maximum wall thickness of . The dam is designed to handle a once in 5,000 year flood event. It utilised state-of-the-art post-tensioning techniques to cope with any problems or movements in the riverbed. The dam has five bay spillway controlled by wide,〔 hydraulically operated fish-belly flap gates.〔 Hinge anchors support the flap gates; with six hinges per gate, and four anchors per hinge. The fish-belly gates allow for a precise control of water level, reducing the dead area on the banks between high and low water levels. As at November 2010, the five gates have only been opened simultaneously once in the dam's history, during heavy flooding in 1976.〔 The dam wall provides a crossing for the lake and consists of a roadway, called Lady Denman Drive, and a bicycle path. The roadway was possible because the dam gates are closed by pushing up from below, unlike most previous designs that wherein the gates were lifted from above. 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「Scrivener Dam」の詳細全文を読む スポンサード リンク
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