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Celilo Canal was a canal connecting two points of the Columbia River between the states of Oregon and Washington, U.S. just east of The Dalles. In the natural state of the Columbia River, there was an stretch above The Dalles known as Celilo Falls that was impassable upstream and navigable downstream only at high water and at great risk. Celilo Canal was built in the early part of the 1900s to allow steamboat and river-borne traffic to bypass Celilo Falls. == History and construction == In 1858, a -long wagon road, the Oregon Portage Railroad, had been built around the falls on the south side of the river. This was replaced in 1863 by a -long portage railway owned by the Oregon Steam Navigation Company. A number of studies and false starts were made towards building a canal around the falls, but construction on what was to become known as the Celilo Canal did not begin until 1905, and then took ten years to complete.〔Timmen, at 36-39〕 In 1909, ''Scientific American'' summarized the status of the work and its objectives:〔(Willey, Day Allen, "The Improvement of the Columbia River", ''Scientific American'', February 13, 1909, page 134 )〕 ''Scientific American'' was also optimistic about the prospective economic value of the canal: The federal government spent 5 million dollars on its construction. For an inaugural cruise, the steamer ''Undine'' left Portland April 29 and arrived in Lewiston, May 3, 1915. 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「Celilo Canal」の詳細全文を読む スポンサード リンク
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