Caples Lake Auxiliary is a private hydroelectric dam located in Alpine County, California, near Kirkwood. The dam, completed in 1922, stands at a height of 33.5 feet and has a maximum storage capacity of 22,338 acre-feet. With a surface area of 600 acres and a drainage area of 13.5 square miles, the dam plays a crucial role in regulating water flow and providing hydroelectric power to the region.

Managed by the Federal Energy Regulatory Commission (FERC), Caples Lake Auxiliary serves multiple purposes, including hydroelectric power generation and recreational activities. The dam is equipped with an uncontrolled spillway measuring 95 feet in width and has a maximum discharge capacity of 1,800 cubic feet per second. Despite its high hazard potential, the dam's risk assessment is moderate (3), indicating the need for ongoing monitoring and risk management measures.

With its scenic location on Caples Creek and its vital role in water resource management and energy production, Caples Lake Auxiliary is a significant infrastructure project in California. The dam's presence highlights the intersection of water resource management, climate resilience, and regulatory oversight, making it a site of interest for enthusiasts interested in these interconnected fields.