Rancho Rubini is a private water supply dam located in Leesville, California, along the Tr Bear Creek. Built in 1955, this earth dam stands at 31 feet high and spans a length of 790 feet, with a storage capacity of 106 acre-feet. The primary purpose of Rancho Rubini is to provide water for irrigation and domestic use, making it an essential resource for the surrounding area.

Managed by the California Department of Water Resources (DWR) under the Safety of Dams program, Rancho Rubini is subject to regular inspections and enforcement to ensure its structural integrity and safety. The dam has a significant hazard potential but has been assessed as satisfactory in condition during the last evaluation in September 2017. With a drainage area of 1.42 square miles, the dam plays a crucial role in water management in Colusa County, contributing to the local ecosystem and agricultural activities.

Although Rancho Rubini has not undergone significant modifications in recent years, its strategic location and storage capacity make it a valuable asset for water supply in the region. With the potential for increased discharge and the need for ongoing risk management measures, the dam remains a focal point for water resource and climate enthusiasts interested in sustainable water usage and infrastructure development in California.