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Mooney Flat, California

1851 establishments in CaliforniaUnincorporated communities in CaliforniaUnincorporated communities in Nevada County, CaliforniaUse mdy dates from July 2023

Mooney Flat was an important mining and transportation hub in western Nevada County, California, just east of the Yuba County line. It was situated on modern Mooney Flat Road, about 1 mile north of modern Highway 20, at an elevation of about 800 ft. Mooney Flat lies at the western end of the auriferous channel that runs down the San Juan Ridge. The channel disappears past French Corral and then reappears around Mooney Flat for a few miles, encompassing the communities, from east to west, of Mooney Flat, Sucker Flat, Smartsville and Timbuctoo, Smartsville was the principal town and still exists today. It is often hard to separate the history of Mooney Flat from the history of Smartsville. While the boundary drawn between Nevada County and Yuba County put Smartsville in Yuba County and Mooney Flat in Nevada County, in ensuing years, the Smartsville residents petitioned unsuccessfully to become part of Nevada County.

Excerpt from the Wikipedia article Mooney Flat, California (License: CC BY-SA 3.0, Authors).

Mooney Flat, California
Mooney Flat Road,

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Wikipedia: Mooney Flat, CaliforniaContinue reading on Wikipedia

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Latitude Longitude
N 39.215555555556 ° E -121.27444444444 °
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Mooney Flat Road 10814
95977
California, United States
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Englebright Dam
Englebright Dam

Englebright Dam is a 280 ft (85 m) high variable radius concrete arch dam on the Yuba River in the Sacramento River Basin, located in Yuba and Nevada counties of California, United States. It was put into service in 1941 by the United States Army Corps of Engineers. The dam was constructed in 1941 for the primary purpose of trapping sediment derived from anticipated hydraulic mining operations in the Yuba River watershed. Hydraulic mining in the Sierra Nevada was halted in 1884 but resumed on a limited basis until the 1930s during the great depression under the California Debris Commission. Although no hydraulic mining in the upper Yuba River watershed resumed after the construction of the dam, the historical mine sites continued to contribute sediment to the river. Today, Englebright Lake is used primarily for recreation and hydropower. Englebright Lake is nestled in the scenic Sierra foothills east of Marysville. Constructed for the storage of hydraulic gold mining debris, Englebright Dam is a concrete arch structure. It spans 1,142 feet (348 m) across and is 260 feet (79 m) high. The dam is in the steep Yuba River gorge known as the Narrows, holding back a 9-mile-long (14 km) lake with a surface area of 815 acres (3.30 km2; 330 ha). The lake is unique in that it offers boat-in camping only. The 70,000-acre-foot (86,000,000 m3) Englebright Reservoir provides water-based recreational benefits to the region and provides 45,000 acre-feet (56,000,000 m3) of stored water-right capacity, which is released each year through dam operations to benefit fish downstream. Water is also diverted for regional domestic and agricultural uses. Hydroelectric generation from water stored behind Englebright produces about 294 million kilowatt hours of energy each year, or enough for the annual energy needs for 50,000 homes.A new flow bypass system was installed in 2006 by the Yuba County Water Agency and Mitchell Engineering so that river flow requirements can be met during shut-downs of the Narrows II Powerhouse at the base of the dam. Narrows 1 Powerhouse is further downstream and smaller than Narrows 2 Powerhouse.