Syphon Canyon, also known as Syphon Reservoir, is a hydroelectric facility located in Orange County, California. Built in 1949, this earth dam stands at a height of 59 feet and has a hydraulic height of 52 feet, with a total length of 843 feet. The reservoir has a storage capacity of 578 acre-feet and serves multiple purposes such as hydroelectric power generation and irrigation.

Managed by a public utility, Syphon Canyon is regulated by the California Department of Water Resources (DWR) and undergoes regular inspections to ensure its safety and compliance with state regulations. The dam has a high hazard potential but has been assessed as being in satisfactory condition as of September 2017. In the event of an emergency, an Emergency Action Plan (EAP) is in place, with the last revision made in February 2021.

Situated along the Tr Newport Bay river system, Syphon Canyon plays a crucial role in water resource management in the region. With its strategic location and efficient operation, this facility contributes to the sustainable utilization of water for both power generation and agricultural needs, highlighting the importance of maintaining and monitoring such vital infrastructure in the face of changing climate conditions.