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Brantley Dam is a flood control and irrigation water storage dam on the Pecos River in Eddy County, New Mexico about north of Carlsbad, New Mexico and upstream from Avalon Dam. ==Background== In the 1960s the McMillan Reservoir was silting up, reducing its storage capacity. A 1964 study of the McMillan and Avalon dams concluded: "a potential flood would exceed existing spillway capacity at McMillan Dam and cause the dam to be overtopped, which would cause the failure of both dams." In 1967 the Bureau of Reclamation issued a report proposing a new dam between Avalon and McMillan that would completely indundate the McMillan reservoir. Congressional approval for the project was given in 1972, with about $45 million of Federal funding authorized. Planning continued throughout the 1970s. By the early 1980s land had been acquired, the site cleared and archaeological mitigation work was underway. Utility lines were moved, highways US 285 and NM 137 were rerouted, and a $15,000,000 realignment of the Santa Fe Railway was constructed. In 1984 construction on the dam began. Concrete work was completed by autumn 1987, and soon after the Pecos River was diverted through the new Brantley floodgates for the first time. That winter, another channel was dredged through the McMillan silt to ease the water flow into Brantley. 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「Brantley Dam」の詳細全文を読む スポンサード リンク
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