Tioga Lake Auxiliary, located in Lee Vining, California, is a private hydroelectric dam constructed in 1928 with a primary purpose of generating electricity. The dam stands at a height of 19 feet and has a storage capacity of 1254 acre-feet, providing necessary water resources for the surrounding area. With a surface area of 73 acres and a maximum discharge of 690 cubic feet per second, the dam plays a crucial role in regulating water flow in Glacier Creek.

Managed by the Federal Energy Regulatory Commission, the Tioga Lake Auxiliary dam has a high hazard potential and is subject to regular state inspections and enforcement to ensure its safety and structural integrity. Although the condition assessment is not currently available, emergency action plans are in place, with the last revision completed in December 2020. Despite moderate risk assessments, the dam continues to serve as a vital resource for both hydroelectric power generation and recreational activities, highlighting the intersection of water resource management and climate resilience in the region.