Kidd Lake Auxiliary is a privately owned earth dam located in Placer, California, with a significant hazard potential. Built in 1850 for hydroelectric purposes, the dam stands at a height of 15 feet and has a hydraulic height of 11.5 feet. With a storage capacity of 1520 acre-feet, it serves as an important structure within the South Yuba River watershed.

Managed by the Federal Energy Regulatory Commission, Kidd Lake Auxiliary undergoes regular inspections to ensure its safety and compliance with regulatory standards. Despite its age, the dam continues to provide essential hydroelectric functions, contributing to the sustainable management of water resources in the region. With a risk assessment rating of high (2), efforts are made to mitigate potential hazards and ensure the effective operation of the dam.

Located in the city of Washington, the Kidd Lake Auxiliary dam plays a crucial role in supporting water resource management and climate resilience in the area. As part of the broader network of structures in the region, it highlights the importance of maintaining and monitoring vital infrastructure to safeguard communities and ecosystems against the impacts of changing climate conditions.