Located in Ojai, California, Senior Canyon Reservoir, also known as Senior Canyon, is a private water supply reservoir built in 1964 on San Antonio Creek. The dam's primary purpose is for irrigation and water supply, with a capacity of 73 acre-feet and a height of 76 feet. The reservoir covers a surface area of 5 acres and serves the surrounding area with its storage of water.

Managed by the California Department of Water Resources, Senior Canyon is regulated and inspected regularly to ensure its safety and functionality. The dam is classified as having a high hazard potential, yet its condition is assessed as satisfactory. The last inspection in September 2020 confirmed its structural integrity, further supported by the Emergency Action Plan (EAP) prepared to address potential risks associated with the reservoir.

Despite its small size and capacity, Senior Canyon Reservoir plays a crucial role in providing water for irrigation and supply in Ventura County. Its location along San Antonio Creek and proximity to Ojai highlights its importance in supporting the local water resource infrastructure. Climate and water enthusiasts will find Senior Canyon an intriguing example of a private water supply reservoir that is well-maintained and regulated for the benefit of the community.