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Savage Rapids Dam was an approximately , irrigation diversion dam spanning the mainstem of the Rogue River in Josephine County, Oregon. The dam was demolished and removed in 2009.〔"Oregon dam's demise lets the Rogue River run," ''LA Times'' ()〕 From 1921 until the spring of 2009, the Savage Rapids Dam almost entirely functioned for irrigation purposes, and it did not provide any flood control, hydro-electric power, inland waterway, or other significant beneficial uses. It only provided very minor recreational or wildlife (such as migratory birds) benefits. Because this dam's facilities for accommodating migrating salmon did not meet current legal or practical standards, the "Grants Pass Irrigation District" (the GPID) had agreed to allow this dam to be demolished and replaced by pumps. The GPID had entered into a U.S. Federal Court consent decree to this effect. Construction of the replacement irrigation pumps began in 2006, and these pumps started service on May 11, 2009. The final dam demolition and removal was completed in October 2009. This project represented one of the largest dam removals ever undertaken in the United States, and it is expected to have significant and enduring positive impacts on the valuable sport and commercial salmon fisheries of Oregon. == History == The Grants Pass Irrigation District was organized by water users in January 1917, and it then contained about of land. In 1920, a diversion dam design was adopted to provide for a direct diversion system with permanent pumping units at a site on the Rogue River about five miles (8 km) east of the town of Grants Pass, Oregon. The Savage Rapids Dam was dedicated November 5, 1921, and this marked the beginning of the operational history of the water district. The Savage Rapids Dam and its related facilities were badly damaged by a flood in 1927. Emergency repairs were made at that time, but the lack of sufficient funds prevented satisfactory completion of the work. By 1949, the cost of maintenance had become prohibitive for the GPID, and soon the U.S. Bureau of Reclamation was asked to replace or repair significant portions of the facility using Federal funds. Construction of a new buried pipeline under the river to replace the old suspension pipeline was completed during the winter of 1949-50. Savage Rapids Dam was rehabilitated from March 25, 1953, to February 22, 1955. Fish ladders on both the north and south sides of the river were upgraded in the late 1950s. Improvements to the current fish passage facilities at the dam were completed in 1978. 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「Savage Rapids Dam」の詳細全文を読む スポンサード リンク
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