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Bartlett Dam
The Bartlett Dam is a concrete multiple-arch buttress dam on the Verde River, located 50 km northeast of Phoenix, Arizona. The dam creates Bartlett Lake and its primary purpose is irrigation water supply. It was the first dam constructed on the Verde River and the first of its type constructed by the U.S. Bureau of Reclamation. It was built between 1936–39 and named after Bill Bartlett, a government surveyor.〔〔
==History==
In response to the Great Depression and subsequent drops in crop prices, farmers struggled harder to have a dam constructed on the Verde River.〔(【引用サイトリンク】url=http://www.fundinguniverse.com/company-histories/Salt-River-Project-Company-History.html )〕 Finally, in 1935, the Salt Water Project received approval to build the Bartlett Dam. The U.S. Bureau of Reclamation constructed the dam between 1936 and 1939, in a total of 1,000 days.〔(【引用サイトリンク】url=http://www.srpnet.com/about/history/timelinetext.aspx )〕 Upon completion, the dam was the tallest multiple arch buttress type in the world at the time. 80% of the funding for the dam was provided by the Salt River Project (SRP) and 20% by the Bureau of Indian Affairs.〔(【引用サイトリンク】url=http://www.srpnet.com/water/dams/bartlett.aspx )〕 Construction on the dam provided needed jobs and flood control on the river. Although flood waters temporarily halted construction in February, 1937, flooding was finally minimized with the construction of the dam. The next large flood in the area would not come until the winter of 1965-66.
Because of safety concerns, the dam was later modified during the mid-1990s by the Bureau of Reclamation. Beginning in March 1994, the dam was raised and subsequently, its service spillway was modified as well to accompany the new height. An unlined auxiliary spillway was also constructed about south of the dam's left abutment. The new spillway consists of a concrete control structure and a three-segment fuse plug which is designed to erode in specific stages during flooding. The modifications to the dam were complete in December 1996.〔(【引用サイトリンク】url=http://www.usbr.gov/projects/Facility.jsp?fac_Name=Bartlett+Dam&groupName=Overview )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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