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Bluestone Lake
Bluestone Lake is a flood control reservoir located on the New River near Hinton, West Virginia. At its normal pool level, Bluestone Dam impounds a stretch of the New and its tributary, the Bluestone River. Normally approximately in size, the lake can grow to over long at flood control pool. At higher water levels, the lake extends into Giles County, Virginia.
==Bluestone Dam==
The lake is formed by Bluestone Dam, a concrete gravity dam located just upstream of the confluence of the New and Greenbrier Rivers. The dam is high and long.〔 The dam was authorized by Presidential Executive Order in 1935 and approved by the U.S. Congress in the Flood Control Acts of 1936 and 1938.〔(【引用サイトリンク】title=Bluestone DSA )〕 Construction of the project was begun in early 1941, suspended in 1944 because of World War II.〔(【引用サイトリンク】title=Construction of Bluestone Dam: Phase I (1941-1944) )〕 Work resumed in 1946, and completed for operational purposes in 1949.〔〔(【引用サイトリンク】title=Construction of Bluestone Dam: Phase II (1945-1949) )〕
In recent years, it was discovered that Bluestone Dam would be unable to pass the Probable Maximum Flood possible at the site, which could cause failure of the dam. To remedy the problem, the U.S. Army Corps of Engineers has undertaken a Dam Safety Assurance program for Bluestone. The DSA project includes raising the dam by , installing anchors and thrust blocks to tie the dam into bedrock, spillway improvements and other work. The first phase of the project was completed in October 2004. The second phase, installing bedrock anchors, is underway as of March 2010 and expected to be finished in 2011. Three additional phases remain to be constructed.〔
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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