Homestake Tailings, located in Lake County, California, is a privately owned earth dam designed for water supply purposes, specifically to store tailings and provide water to the surrounding area. Completed in 1990, this dam stands at a height of 169 feet and has a hydraulic height of 163 feet, with a storage capacity of 32,370 acre-feet. The dam spans a length of 11,670 feet and covers a surface area of 412 acres, with a drainage area of 1.48 square miles.

Despite its high hazard potential, Homestake Tailings has been assessed to be in satisfactory condition during its last inspection in September 2017. The dam is regulated by the California Department of Water Resources and is subject to regular inspections, enforcement, and permitting. The emergency action plan for the dam was last revised in January 2021, ensuring that proper measures are in place in case of any unforeseen events. Overall, Homestake Tailings serves as a crucial water resource infrastructure in the region, providing water for various purposes while adhering to strict regulatory guidelines to ensure public safety and environmental protection.