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Pyramid Dam
Pyramid Dam is a dam on Piru Creek located in northern Los Angeles County, north of Castaic and south of Gorman. Its reservoir, Pyramid Lake, stores water from the West Branch California Aqueduct for Ventura County and Los Angeles County. They are smaller than Castaic Dam and Lake, the other artificial water storage facility in the area, to the south.
==Funding and construction==
Construction of the dam was made possible by California voter approval in 1960 of the California Aqueduct project, also referred to as the Feather River project (the source of the water in the northern part of the state north of Auburn). State bonds were issued to finance the project. Pyramid Dam, which first began construction in 1968, is 386 feet (118 m) high. It lies directly behind the mountain rock giving the dam and lake its name - Pyramid Cut - which before the Ridge Route Alternate (later signed as U.S. Route 99) was built through the area in the 1931 to 1933 time period, was just another ordinary mountain. The highway construction of the Ridge Route Alternate caused this mountain to have part of its mass "shaved" off - reduced in size - and after the work to accommodate highway traffic was finished, the shape of the cut was found to resemble a pyramid, and hence the name.
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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