Alpine Auxiliary No. 2 is a private-owned dam located in Dorrington, California, serving multiple purposes including hydroelectric power generation, recreation, and water supply. This rockfill dam stands at 21 meters in height and has a storage capacity of 4,300 acre-feet, with a maximum discharge of 3,400 cubic feet per second. Situated on Silver Creek, this dam is regulated by the California Department of Water Resources and inspected by the Federal Energy Regulatory Commission, ensuring its safety and compliance with state and federal regulations.

With a low hazard potential and a moderate risk assessment rating, Alpine Auxiliary No. 2 provides essential services while also offering recreational opportunities in the surrounding area. The dam has a spillway width of 166 meters and an uncontrolled spillway type, contributing to its efficient water management capabilities. The dam's condition assessment is not available, highlighting the need for ongoing monitoring and maintenance to ensure its continued operation and safety for the community.

Alpine Auxiliary No. 2 plays a crucial role in the water resource infrastructure of Alpine County, California, with its strategic location and reliable operation contributing to the region's water management and energy needs. With a comprehensive emergency action plan in place and regular inspections by regulatory agencies, this dam stands as a testament to effective dam management practices and the importance of ensuring the safety and resilience of critical water infrastructure in the face of changing climate conditions.