Airport Reservoir D, located in Windsor, Sonoma, California, is a vital water resource infrastructure managed by the local government. Completed in 2002, this earth dam stands at a height of 45 feet and has a storage capacity of 315 acre-feet. Its primary purpose is to provide water supply, along with serving flood risk reduction and irrigation needs in the region.

With a significant hazard potential, Airport Reservoir D is regulated and inspected by the California Department of Water Resources to ensure its safety and compliance with state regulations. The dam's condition was last assessed as satisfactory in September 2017, with regular inspections conducted every year. In the event of an emergency, it is essential for the authorities to have an Emergency Action Plan (EAP) in place.

Located offstream, Airport Reservoir D plays a crucial role in managing water resources in the region. Its strategic design and capacity contribute to the sustainable utilization of water for various purposes, highlighting the importance of effective infrastructure management for water security and climate resilience in California.