Diederich Reservoir in Glendale, California is a vital offstream water supply facility owned and regulated by the local government. Completed in 1950, this Earth dam stands at 60 feet tall with a storage capacity of 174 acre-feet, serving as a critical water resource for the region. The reservoir covers 7 acres and plays a key role in water management for the area.

With a high hazard potential, Diederich Reservoir undergoes regular inspections to ensure its structural integrity and overall safety. The dam is classified as satisfactory in condition, with the last assessment conducted in September 2017. In the event of an emergency, an emergency action plan is in place, with the most recent revision made in January 2021. This reservoir is a key component in ensuring water supply reliability and security for the community, highlighting the importance of diligent maintenance and oversight.

Situated in Los Angeles County, Diederich Reservoir is a key component of the water infrastructure in the area, providing essential storage capacity for water supply purposes. With its strategic location and significance in the region, this reservoir serves as a critical resource for managing water resources and climate-related challenges in the area. The careful monitoring and maintenance of Diederich Reservoir underscore the commitment to safeguarding this essential water supply source for the community.