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The Upper American River Project (UARP) is a hydroelectric system operated by the Sacramento Municipal Utility District (SMUD) of Sacramento, California in the United States. The system consists of 11 dams and eight powerhouses that tap the upper tributaries of the American River drainage for power generation. Total installed capacity is over 687 MW, producing 1.8 billion KWh annually, enough for 20 percent of the city's electricity needs. The project mainly utilizes water from the South Fork American River and its tributaries, although some water is drawn from the Rubicon River, a tributary of the Middle Fork American River. Project dams provide water storage of about and a total hydraulic head of from the highest reservoir to the lowest powerplant outflow.〔 ==History== The UARP was authorized on August 28, 1957 by an act of the Federal Power Commission. SMUD began construction in September of that year, and the first power generation from UARP came online at Jaybird Powerhouse on May 1, 1961. Most of the project facilities were completed by 1967. The Loon Lake Powerhouse was completed in 1971, and Jones Fork Powerhouse was finished in 1985.〔 Environmental impacts include the prevention of fish passage by the project's dams, which segment parts of the upper South Fork American River, the Rubicon River and their tributaries. SMUD is considering the incorporation of a 400 MW pumped-storage hydroelectric facility into the UARP, which would occur following the project's relicensing in the early 21st century. 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「Upper American River Project」の詳細全文を読む スポンサード リンク
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