Elderberry Forebay, located in Los Angeles, California, is a crucial water resource managed by the local government for water supply purposes. Completed in 1972, this earth dam stands at a height of 179 feet and has a maximum storage capacity of 32,500 acre-feet. With a normal storage capacity of 27,700 acre-feet and a surface area of 463 acres, this dam plays a critical role in water management for the region.

In addition to its primary water supply function, Elderberry Forebay also serves for hydroelectric power generation, recreation, and flood control. With a low hazard potential and moderate risk assessment rating, the dam is regulated by the Department of Water Resources and undergoes regular inspections to ensure its safety and efficacy. The spillway, with a width of 593 feet, is designed as uncontrolled for managing excess water flow during heavy rainfall events.

The Federal Energy Regulatory Commission oversees the operations and inspections of Elderberry Forebay, ensuring that the dam meets safety standards and guidelines. With its strategic location on Castaic Creek and a drainage area of 75.7 square miles, this dam plays a vital role in water resource management and climate adaptation efforts in the region.