Henshaw, also known as Lake Henshaw, is a public utility water reservoir located in Pauma Valley, California. Managed by state regulatory agencies such as the Department of Water Resources (DWR) and Safety of Dams, Henshaw plays a vital role in supplying water for irrigation and other purposes in the region. The earth dam, completed in 1923, stands at a height of 123 feet and has a maximum storage capacity of 50,000 acre-feet.

Situated on the San Luis Rey River, Henshaw covers a surface area of 2000 acres and has a drainage area of 207 square miles. With a high hazard potential but a satisfactory condition assessment, the dam is inspected regularly to ensure its safety and functionality. Despite its age, Henshaw continues to play a crucial role in water resource management in the area, serving as a reliable source of water supply for the surrounding communities.

The dam's emergency action plan (EAP) is periodically reviewed and updated to meet guidelines, ensuring that proper risk management measures are in place. With its strategic location and significant storage capacity, Henshaw remains a key asset in the region's water infrastructure, highlighting the importance of sustainable water resource management and climate resilience in the face of changing environmental conditions.