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Laguna Creek (''Spanish for'': Lake Creek) is a perennial stream that flows northwesterly for 〔(【引用サイトリンク】url=http://viewer.nationalmap.gov/viewer/ )〕 along the San Andreas Fault from Woodside in San Mateo County, California and, after crossing the Phleger Estate and Filoli, enters Upper Crystal Springs Reservoir, where it is a historic tributary to San Mateo Creek. San Mateo Creek then carries its waters over Crystal Springs Dam northeast to San Francisco Bay. ==History== After discovering San Francisco Bay from Sweeney Ridge on November 4, 1769, the Portolà expedition descended on what Portolà called the ''Cañada de San Francisco'', now known as San Andreas Creek, to its confluence with San Mateo Creek. Just downstream from here was Laguna Creek's confluence with San Mateo Creek. Crossing San Mateo Creek just above its canyon, Portola's party proceeded south along Laguna Creek and camped on a lake which Portolà called Laguna Grande, now covered by Upper Crystal Springs Reservoir. The campsite is marked by California Historical Marker No. 94, "Portola Expedition Camp", located at Crystal Springs Dam, on Skyline Boulevard, 0.1 mi south of Crystal Springs Road.〔(【引用サイトリンク】publisher=California State Parks Office of Historic Preservation )〕 Then Portola continued south and descended from the foothills along San Francisquito Creek to established his base camp at El Palo Alto, in modern day Palo Alto, California. The Laguna Creek and Laguna Grande place names are shown on the 1856 plat maps/diseños of Rancho de las Pulgas and Rancho Cañada de Raymundo and Easton's 1868 map of San Mateo County. Raimundo, a native of Baja California, was sent out by the padres of Mission Santa Clara to capture runaway Mission Indians in 1797.〔 On August 4, 1840, he was granted the Rancho Cañada de Raymundo and on the 1856 Rancho Pulgas and 1868 Easton maps, the valley of Laguna Creek was referred to as the ''Cañada de Raymundo'' and Laguna Grande became alternatively known as ''Lake Raymundo''.〔〔 Laguna Creek was also alternatively known as ''Cañada Raimundo Creek''. The two Crystal Springs lakes and San Andreas Lake used to be known as ''Spring Valley Lakes'' for the Spring Valley Water Company which owned them. The Spring Valley Water Company named the lakes, the Spring Valley Lakes, after the company. The original Spring Valley was between Mason and Taylor Streets, and Washington and Broadway Streets in San Francisco, where the water company started. When the company went south for more water, the Spring Valley name was carried south too. Laguna Grande was submerged when the Spring Valley Water Company built an earthen dam in 1877 (this was the first Crystal Springs Dam), forming Upper Crystal Springs Reservoir. The old earthen dam became a causeway between Upper and Lower Crystal Springs Reservoirs when the latter was formed by Herman Schussler's concrete Crystal Springs Dam, which dammed up San Mateo Creek to form the lower reservoir in 1888. The causeway is now crossed by Highway 92. Filoli, the estate of Spring Valley Water Company tycoon William Bourn, is now an historic site. The staff there currently refers to Laguna Creek as "Orchard Creek", and its tributaries on the historic estate as Fault Creek and Spring Creek. 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「Laguna Creek (San Mateo County)」の詳細全文を読む スポンサード リンク
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