Located in Fresno, California, the Portal Forebay Dike is a private dam with a primary purpose of hydroelectric power generation. Built in 1956, this earth dam stands at a height of 18 feet and has a length of 350 feet. It has a storage capacity of 390 acre-feet, with a normal storage level of 325 acre-feet. Situated on Camp 61 Creek in the city of Mono Hot Springs, this structure is regulated by the state and inspected by the Department of Water Resources (DWR) under the Safety of Dams program.

The Portal Forebay Dike is owned by a private entity and is under the jurisdiction of the state of California. As a vital component of the local water resource infrastructure, it plays a crucial role in water management and hydroelectric power generation in the region. The dam's low hazard potential and high risk assessment rating highlight the importance of regular inspections and maintenance to ensure its structural integrity and safety. The Federal Energy Regulatory Commission oversees its regulation and inspections, emphasizing the commitment to maintaining its operational efficiency and safety standards.

Despite its low hazard potential, the Portal Forebay Dike serves as a significant structure for water storage and power generation in the area. With a focus on maintaining its safety and structural integrity, the dam plays a crucial role in supporting the region's water and energy needs. As water resource and climate enthusiasts continue to monitor and assess the impact of infrastructure like the Portal Forebay Dike on the local ecosystem and climate resilience, ongoing regulatory oversight and risk management measures are essential to ensure the long-term sustainability of this vital infrastructure.