Guenoc Lake, also known as Detert Reservoir, is a privately owned water resource located in Aetna Springs, California. This reservoir plays a crucial role in flood risk reduction, irrigation, and water supply for the surrounding area. Built in 1928, this earth dam stands at a height of 50 feet and has a storage capacity of 3,237 acre-feet. The lake covers an area of 188 acres and is fed by Bucksnort Creek, making it a vital source of water for both wildlife and human consumption.

Managed by the California Department of Water Resources and subject to state regulations, Guenoc Lake is inspected regularly to ensure its structural integrity and safety. With a significant hazard potential, the dam is deemed to be in satisfactory condition as of the last assessment in January 2019. In case of emergencies, the reservoir is equipped with emergency action plans, although details about their preparation and guidelines adherence are not specified in the data. Overall, Guenoc Lake stands as a vital infrastructure for water management in the region, serving multiple purposes and contributing to the overall resilience of the local water supply system.