Cuyamaca, also known as Lake Cuyamaca, is a public utility located in San Diego, California, along Boulder Creek. This dam, completed in 1887, serves multiple purposes including flood risk reduction, irrigation, and water supply. With a height of 40 feet and a storage capacity of 11,740 acre-feet, Cuyamaca plays a crucial role in managing water resources in the region.

Managed by the California Department of Water Resources (DWR) for safety and regulation, Cuyamaca has a high hazard potential but is currently in satisfactory condition as of the last assessment in September 2017. The dam is inspected annually, with the most recent inspection conducted in September 2019. Despite its age, Cuyamaca continues to be a vital infrastructure for water management in the area, ensuring the safety of downstream communities and providing essential water resources for various uses.

As a key component in the flood risk reduction efforts in the region, Cuyamaca is a historic and essential structure that exemplifies the intersection of water resource management and climate resilience. With its strategic location and storage capacity, this dam remains an integral part of California's water infrastructure, highlighting the importance of maintaining and monitoring such critical assets in the face of changing climate conditions.