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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 Willamette Falls Locks ： ウィキペディア英語版 Willamette Falls Locks The Willamette Falls Locks are a lock system on the Willamette River in the US state of Oregon. Opened in 1873 and closed since 2011, they allowed boat traffic on the Willamette to navigate beyond Willamette Falls – since their closure in 2011 the locks are classified to be in a "non-operational status" and are expected to remain permanently closed. Located in the Portland metropolitan area, the four inter-connected locks are 25 miles upriver from the Columbia River at West Linn, just across the Willamette River from Oregon City. The locks are operated by the United States Army Corps of Engineers and served primarily pleasure boats. These locks were added to the National Register of Historic Places in 1974. ==History== The Willamette Falls Canal and Locks Company (later renamed Portland General Electric) was formed in 1868 to build a navigation route around the falls.〔Corning, Howard M. ''Dictionary of Oregon History''. Binfords & Mort Publishing, 1956.〕 Construction then began on building a canal and lock system around the west end of the falls.〔 The locks opened on January 1, 1873, as the first multi-lift navigation locks in the United States at a cost of $560,000, and had been in continuous use until 2008. ''Maria Wilkins'', a steamship, was the first vessel to use the locks.〔 The Army Corps of Engineers purchased the lock system from Portland General Electric in 1915 for $375,000.〔 The locks were added to the National Register of Historic Places in 1974. 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「Willamette Falls Locks」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.