Vasona Percolating, also known as Vasona Reservoir, is a public utility water resource located in Los Gatos, California. This reservoir plays a crucial role in flood risk reduction, irrigation, and water supply in the region. Built in 1935, this earth dam stands at a height of 34 feet and has a hydraulic height of 22 feet, holding a storage capacity of 410 acre-feet. With a drainage area of 44.2 square miles, Vasona Percolating is situated on the Los Gatos Creek, serving as a vital water management infrastructure in Santa Clara County.

Managed by the California Department of Water Resources (DWR) under the Safety of Dams program, Vasona Percolating is regularly inspected to ensure its structural integrity and operational readiness. The dam has a high hazard potential due to its location and the surrounding urban development. Despite this, the condition assessment in 2017 deemed it satisfactory, with an inspection frequency of once per year. The emergency action plan (EAP) for the reservoir was last revised in September 2018, highlighting the proactive measures in place to address any potential risks or emergencies.

In addition to its flood risk reduction capabilities, Vasona Percolating provides essential water storage and management services for the local community. As climate change continues to impact water resources, the importance of well-maintained infrastructure like Vasona Percolating cannot be overstated. With a long history of service and a commitment to safety and regulation, this reservoir remains a critical asset in ensuring water security and resilience in Santa Clara County.