Big Santa Anita is a crucial dam located in Sierra Madre, California, serving as a vital component for flood risk reduction, irrigation, and water supply in the region. Built in 1927, this arch-type dam stands at a height of 225 feet, with a hydraulic height of 127 feet and a length of 612 feet, providing a storage capacity of 858 acre-feet. Situated on the Tr Rio Hondo river, the dam covers a surface area of 5 acres and drains a watershed area of 10.8 square miles, making it a significant structure in managing water resources in Los Angeles County.

Despite its age, the dam is in satisfactory condition according to a 2017 assessment, with a high hazard potential due to its critical role in flood risk reduction. The dam is under the jurisdiction of the California Department of Water Resources and is subject to regular inspections, permitting, and enforcement to ensure its structural integrity and safety. The surrounding community relies on Big Santa Anita for protection against flooding events and as a vital source of water for irrigation and supply, highlighting the importance of maintaining and monitoring this key infrastructure in the face of changing climate conditions.

With a history of serving the local community for over nine decades, Big Santa Anita continues to play a vital role in water resource management and climate resilience efforts in Southern California. As climate change brings about more frequent and intense weather events, the dam's role in flood risk reduction becomes increasingly crucial. By ensuring the ongoing maintenance and monitoring of this essential infrastructure, stakeholders can better prepare for and mitigate the impacts of extreme weather events, safeguarding both lives and property in the region.