Beardsley Afterbay, located in Sonora, California, serves as a vital hydroelectric resource along the Middle Fork Stanislaus River. Built in 1958, this rockfill dam stands at a height of 33 feet, containing a maximum storage capacity of 355 acre-feet. With a primary purpose of hydroelectric power generation, Beardsley Afterbay plays a crucial role in providing sustainable energy to the region.

Managed by a public utility entity and regulated by the Department of Water Resources and the Federal Energy Regulatory Commission, Beardsley Afterbay boasts a low hazard potential and moderate risk assessment rating. Despite its age, the dam has undergone regular inspections and meets state jurisdiction and permitting requirements. While the spillway type is uncontrolled, the dam's structural integrity remains sound, ensuring the safety of the surrounding communities.

With its picturesque surroundings and functional design, Beardsley Afterbay stands as a testament to the intersection of water resource management and climate sustainability. As a key player in the local hydroelectric infrastructure, this dam continues to harness the power of the Middle Fork Stanislaus River while adhering to stringent regulatory standards and ensuring the safety of its operations.