Sherwood Lake, California
| Lake Sherwood Dam | |
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_Dam_in_1907.jpg)
Lake Sherwood Dam in 1907. Photograph by John Sparhawk Appleton.
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 Location of Lake Sherwood Dam in California
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| Country | United States |
| Location | Ventura County, California |
| Coordinates | 34°08′21″N 118°51′26″W / 34.13917°N 118.85722°WCoordinates: 34°08′21″N 118°51′26″W / 34.13917°N 118.85722°W |
| Status | Operational |
| Construction cost | $2,000 (1904) |
| Owner(s) | Lake Sherwood Association |
| Dam and spillways | |
| Type of dam | Arch, constant-radius |
| Impounds | Mishe Mokwa Creek, Potrero Valley Creek |
| Height | 45 ft (14 m) |
| Length | 270 ft (82 m) |
| Reservoir | |
| Creates | Lake Sherwood |
| Total capacity | 2,600 acre·ft (3,200,000 m3) |
The Sherwood Dam, known also as Lake Sherwood Dam,Alturas Dam, and Potrero Dam, is a 270 feet (82 m) long concrete arch dam in the Santa Monica Mountains near Thousand Oaks, California, completed in 1904. Its construction led to the creation of the 165 acres (67 ha) Potrero Lake (since renamed Lake Sherwood) over the following winter. It was the first reservoir of its size in the area, and the Sherwood Dam remains one of the oldest standing dams in California.
Construction was led by W. H. Matthiessen, a rancher who owned what is today Hidden Valley,Lake Sherwood, and Thousand Oaks. Originally called the Alturas Dam, it was built as a desperate means to contain the water from four main streams draining into a sixteen-mile catchment basin. Potrero Lake was formed that winter, its sudden existence attracting local photographers and filmmakers alike to the exotic shores.
The reservoir also directly inspired civil engineers such as William Mulholland, who began designing the Los Angeles Aqueduct in 1905. The Malibou Lake Mountain Club built a similar dam nearby, forming Malibou Lake not long after. Matthiessen's son Christy allowed Douglas Fairbanks to shoot his film Robin Hood around his lake in 1921. As a result, the ranch became better known as Sherwood Forest; Potrero Lake since being known as Lake Sherwood.
Much of Matthiessen's Ranch, including the dam and lake, was deeded to his son's ex-wife, Elsie Canterbury, in 1923. That same year, the area southwest of Lake Sherwood was subdivided as Lake Sherwood (community) into 2,500 plots by Elsie and her new husband. "The idea was to offer a country club setting, lake privileges, bridle paths and the Sherwood Country Club clubhouse for the affluent people of the Roaring Twenties. " However, construction of the private community was halted by the stock market crash of 1929, and Elsie Canterbury was forced to sell the land west of the lake to William Randolph Hearst. Hearst profited much from the geographic beauty created by Sherwood Dam, specifically from the booming film industry. For example, he allowed Warner Brothers to film The Adventures of Robin Hood on his picturesque landscape. It ended up being the highest-grossing film of 1938.
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