Portola Dam, located in Mission Viejo, California, is a vital part of the region's water supply infrastructure. Completed in 1980, this earth dam stands at a height of 53 feet and has a storage capacity of 586 acre-feet. Its primary purpose is to provide water for irrigation and drinking water needs in the area. The dam is regulated and inspected by the California Department of Water Resources for safety and compliance with state regulations.

The Portola Dam is situated on the Canada Gobernadora River and is managed by a public utility entity. With a high hazard potential, the dam is regularly assessed for its condition and emergency preparedness. The latest inspection in November 2020 found the dam to be in satisfactory condition, meeting safety guidelines. In case of any emergencies, the dam operators have an Emergency Action Plan in place, last revised in December 2020, to ensure swift and effective response.

Enthusiasts of water resources and climate in Orange County can appreciate the significance of the Portola Dam in ensuring a reliable water supply for the community. With its critical role in water storage and distribution, as well as its adherence to regulatory standards and safety measures, the Portola Dam stands as a testament to responsible water management in the region. Its presence on the Canada Gobernadora River contributes to the environmental sustainability and resilience of Mission Viejo and surrounding areas.