Donnells Dam, Hydroelectric power station in Tuolumne County, California, US.
Donnells Dam is a concrete arch dam in Tuolumne County that spans the Middle Fork of the Stanislaus River. The structure creates a reservoir within a national forest setting and measures about 960 feet (293 meters) in length.
Construction of the dam began in 1955 as part of a regional project involving multiple irrigation districts. The design responded to growing demands for both water and electric power in the area.
The dam reflects how California approached water management and power generation in the mid-20th century. Visitors experience the structure as both an energy source and a tool that shaped farming in the surrounding region.
The area offers recreational activities including fishing, boating, and hiking around the reservoir. Visitors should check local conditions and seasons before planning their visit to this remote forest location.
The dam uses an arch design that distributes pressure across the canyon rather than relying solely on mass like traditional dams. This engineering approach allows it to hold back a substantial volume of water while using less concrete than conventional structures.
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