Fullerton Dam, also known as Fullerton Reservoir, is a federal-owned structure located in Orange County, California. Built by the US Army Corps of Engineers in 1941, the primary purpose of the dam is flood risk reduction along the East Fullerton Creek. Standing at 46 feet tall and 575 feet long, the dam has a storage capacity of 1342 acre-feet and a maximum discharge of 3640 cubic feet per second.

The dam's uncontrolled spillway and high hazard potential necessitate regular inspections and risk management measures by the US Army Corps of Engineers. Despite the limited capacity to store water, the dam plays a crucial role in managing water levels and alleviating pressure during severe weather events. The Corps works closely with local emergency managers and the public to raise awareness and ensure preparedness for any potential dam-related emergencies, including maintaining an updated emergency action plan and conducting regular maintenance and repairs.

As a notable feature in the area, Fullerton Dam serves not only as a flood risk reduction structure but also provides recreational opportunities. Its ongoing risk assessment and management efforts aim to enhance public safety and ensure the dam's structural integrity for years to come.