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}} Piedras Blancas Light Station is located at Point Piedras Blancas, about west by northwest of San Simeon, California.〔NOAA chart #18700: Point Conception to Point Sur, 1/216116, 2003〕 ==History and management == The first-order Fresnel lens at Piedras Blancas was first illuminated on February 15, 1875. The Piedras Blancas lighthouse was originally high to the top of the ventilator ball, but earthquakes damaged the structure over the years. On December 31, 1948, final damage from an earthquake centered off the point led to the decision to remove the upper three floors: the fourth landing, watch room, and lantern. Missing the ornate upper floors, the truncated lighthouse now stands about tall. The lens was moved and is on display in the nearby community of Cambria.〔()〕 A sound signal was added in 1906. In 1939, management was transferred from the United States Lighthouse Service to the United States Coast Guard. In 1975, the light was automated, the sound signal removed, and the light station was unmanned. A group of biologists with the U.S. Fish and Wildlife Service received permission to establish a biological research station in 1977. In 2001, the Bureau of Land Management (BLM) assumed management of the site and was tasked to offer structured public access, allow site-specific research to continue, and restore the light station to its period of greatest historical significance (1875 to 1940). The Piedras Blancas Light Station Association is a non-profit partner of the BLM, helping to raise funds for restoration and maintenance. The lighthouse continues to serve as an aid to navigation. A Vega VRB-25 produces a flash every 10 seconds. The light station is managed as a historic park and wildlife sanctuary. The Piedras Blancas Light Station has been designated as an Outstanding Natural Area.〔The Consolidated Natural Resources Act of 2008 ()〕 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「Piedras Blancas Light Station」の詳細全文を読む スポンサード リンク
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