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Great Salt Plains Lake
Great Salt Plains Lake is a reservoir located within the Salt Plains National Wildlife Refuge in Alfalfa County, Oklahoma in the United States named because of the salt flats in the area and for the Salt Fork Arkansas River, which is dammed to form the lake. It is notable for the variety of birds that are attracted to Ralstin Island (not open to the public) and also for the selenite crystals that can be collected along the shoreline. Recent droughts, most notably that of 2011, have had an adverse effect on the future of the lake.
==Physical description==
A study made in 1931 for the U.S. Army Corps of Engineers proposed building a flood control dam in the Great Salt Plains area. Congress authorized its construction in 1936. Design studies began in 1937 and the Corps broke ground for construction in September 1938. The dam was completed in July 1941, with a water capacity of . The lake covers and has of shoreline. The average depth is . The saline content is reportedly one-fourth that of the ocean.〔(Thomas L. Hedglen, "Great Salt Plains State Park and National Wildlife Refuge," ''Encyclopedia of Oklahoma History and Culture''. ) Accessed April 20, 2015.〕
Ralstin Island, created at the same time as the lake, is home to heron, egret and ibis.〔 The fish vary from catfish, saugeye (related to the walleye, sandbass and hybrid striper.)
The State of Oklahoma leased on August 1, 1958 for a state park.〔
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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