Puddingstone Diversion, located in La Verne, California, is a vital structure designed for flood risk reduction along the San Dimas Wash. Built in 1928, this earth dam stands at a height of 34 feet and has a hydraulic height of 18.5 feet, providing a storage capacity of 150 acre-feet. The dam spans 825 feet in length and covers a surface area of 16 acres, serving a drainage area of 19.8 square miles. Despite its age, the dam's condition was assessed as satisfactory during the last inspection in September 2017, with a high hazard potential necessitating frequent monitoring.

Owned and regulated by the local government, Puddingstone Diversion is subject to state oversight by the Department of Water Resources and Safety of Dams. Inspected annually, the dam is maintained in compliance with state permitting, inspection, and enforcement requirements to ensure its effectiveness in flood risk mitigation. The structure's emergency action plan, risk assessment, and inundation maps are key components in managing potential hazards and ensuring public safety in the event of a dam failure. With its historical significance and continued functionality in safeguarding the surrounding area, Puddingstone Diversion stands as a testament to responsible water resource management and climate resilience efforts in California.