O'Shaughnessy Dam is a 430-foot (131 m) high concrete arch-gravity dam in Tuolumne County, California, United States. It impounds the Tuolumne River, forming...

O'Shaughnessy Dam can refer to: O'Shaughnessy Dam (California), the dam that creates the Hetch Hetchy reservoir in Yosemite National Park O'Shaughnessy...

In 1923, the O'Shaughnessy Dam was completed on the Tuolumne River, flooding the entire valley under the Hetch Hetchy Reservoir. The dam and reservoir...

The O'Shaughnessy Dam is located on the Scioto River near Dublin, Ohio, United States. The dam forms O'Shaughnessy Reservoir, which is a major source of...

Michael Maurice O'Shaughnessy (28 May 1864 – 12 October 1934) was an Irish civil engineer who became city engineer for the city of San Francisco during...

dam. Approximately 10 miles (16 km) upstream of Griggs Dam is the slightly larger O'Shaughnessy Dam, which is also owned and operated by the city of Columbus...

of San Francisco to support the construction and expansion of the O'Shaughnessy Dam across Hetch Hetchy Valley. Based in Groveland, the HHRR operated...

were to be removed, it would dwarf any completed dam removal project in history. O'Shaughnessy Dam in California was completed in 1923 and represented...

dam project, which when completed in 1925, was considered the "best inland city reservoir and dam in the United States." It was named O'Shaughnessy Dam...

while others, including Gifford Pinchot, supported it. In 1913, the O'Shaughnessy Dam was approved via passage of the Raker Act. In 1918, Clare Marie Hodges...