Dunn Ranch, located in Anza, California, is a privately owned dam that serves as a crucial water supply infrastructure in Riverside County. Completed in 1987, this earth dam stands at a height of 44 feet and has a storage capacity of 90 acre-feet. It primarily caters to irrigation and water supply needs in the region, drawing water from the Tr Hamilton Creek.

Managed and regulated by the California Department of Water Resources (DWR) under the Safety of Dams program, Dunn Ranch has a high hazard potential but is currently assessed to be in satisfactory condition. With regular inspections and state oversight, the dam ensures the safety and reliability of its operations. The surrounding area of the dam covers a surface area of 7 acres and has a drainage area of 0.2 square miles.

Despite its critical role in water management, Dunn Ranch has not undergone significant modifications since its construction. It is essential for water resource and climate enthusiasts to recognize the importance of maintaining and monitoring such infrastructure to ensure the sustainable utilization of water resources in the face of changing environmental conditions and increasing water demands.