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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Jones Falls Dam ： ウィキペディア英語版 Jones Falls Dam Jones Falls Dam is a dam on the Rideau Canal located in Rideau Lakes, Leeds and Grenville United Counties, Ontario, Canada, that was built in 1831 and completed in 1832 to tame the mile-long series of rapids and falls that runs through the Jones Falls. ==History== The dam was built by John Redpath and Thomas McKay. When completed in 1832, the Jones Falls dam was the largest dam in North America, a big accomplishment in engineering. In order to keep the water in control during construction, two sluices, artificial channels for conducting water, were kept open in the dam. The first was near the base of the dam on its east side. A second sluice was put in on the west side of the dam, about 20 feet (6 metres) above the base. To make the switch from the lower to upper sluice, the outlet of Sand Lake was blocked off. It is called the ‘Whispering Dam’ because if a person stands at one edge of the dam, near the top, and another person stands at the other edge, the two can communicate quite well over a distance of almost . This is because of the shape of the dam in an arch and the use of sandstone rather than mortar. This abnormal quality was not planned, just a delightful result of the design. 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「Jones Falls Dam」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.