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Lake Berryessa is the largest lake in Napa County, California. This reservoir is formed by the Monticello Dam, which provides water and hydroelectricity to the North Bay region of the San Francisco Bay Area. The lake was named for the first European settlers in the Berryessa Valley, José Jesús and Sexto "Sisto" Berrelleza (a Basque surname, Anglicized to "Berreyesa", then later respelled "Berryessa"), who were granted Rancho Las Putas in 1843. Prior to its inundation, the valley was an agricultural region, whose soils were considered among the finest in the country. The main town in the valley, Monticello, was abandoned in order to construct the reservoir. This abandonment was chronicled by the photographers Dorothea Lange and Pirkle Jones in their book ''Death of a Valley''. Construction of Monticello Dam began in 1953,〔(Facts, Lake Berryessa (Bureau of Reclamation) )〕 completed in 1958, and the reservoir filled by 1963, creating what at the time was the second-largest reservoir in California after Shasta Lake. The Monticello Dam with Lake Berryessa, Putah Diversion Dam with Lake Solano, and associated water distribution systems and lands are known collectively as the Solano Project, which is distinct from other federal water projects in California such as the Central Valley Project. The lake has been heavily used for recreational purposes and encompases over 20,000 acres (80 km²) when full. The reservoir is approximately 15.5 miles (25 km) long but only 3 miles (5 km) wide. It has approximately 165 miles (265 km) of shoreline. It has a seaplane landing area that is open to the public. One of the larger islands supported a small plane landing area but was closed in the early 1970s after the FAA issued a safety report. Near the dam on the southeast side of the reservoir is an open bell-mouth spillway, in diameter, which is known as the Glory Hole. The pipe has a straight drop of ,〔(【引用サイトリンク】title=NORTH BAY / Woman Sucked Into Lake Berryessa Spillway )〕 and the diameter shrinks down to about . The spillway has a maximum capacity of 48.000 cfs (1360 cms). In 1997 a woman was killed after being pulled inside the spillway.〔 The lake was the site of one of the infamous Zodiac murders on September 27, 1969. ==Hydrology== The lake is fed by the head waters to the 576-square-mile (1,490 km²) Putah Creek watershed. It has a storage capacity of , making it one of the larger reservoirs in California. Though the lake and Monticello Dam are in Napa County, the water yield of up to about 245,000 acre-feet per year from the Solano Project is largely contracted to Solano County Water Agency and managed under subcontract by Solano Irrigation District for use in Solano County. The water is used for agricultural, municipal, and industrial purposes under a contract for use of water rights held by the federal Bureau of Reclamation. Another contract allows for use of up to 1,500 acre-feet of water per year around Lake Berryessa in Napa County. The 25-year contracts were renewed in 2009. The Monticello Dam Powerplant built in 1983 generates up to 12 MW of hydroelectric power. A settlement of water right claims to Putah Creek was made in 2000. Known as the Putah Creek Accord, it allowed for scheduled instream flows in lower Putah Creek flowing to the Yolo Bypass. Water rights for the watershed above Monticello Dam were amended in 1996. 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「Lake Berryessa」の詳細全文を読む スポンサード リンク
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