Phoenix is a historic hydroelectric dam located in East Sonora, California, along the Sullivan Creek. Built in 1880, this Earth-type structure stands at a height of 52 feet and has a storage capacity of 455 acre-feet. With a primary purpose of hydroelectric power generation, Phoenix also serves irrigation and water supply needs in the region.

Managed by a public utility, Phoenix is regulated and inspected by the California Department of Water Resources and Safety of Dams. Despite its age, the dam is in satisfactory condition and has a high hazard potential. Regular inspections ensure its safety, with the last assessment conducted in February 2021. In the event of an emergency, the dam has an Emergency Action Plan in place to guide response efforts.

As a crucial water resource infrastructure in Tuolumne County, Phoenix plays a vital role in providing renewable energy and water to the surrounding areas. With its rich history and ongoing maintenance efforts, this dam continues to support the local community's needs while adhering to regulatory standards for safety and operation.