York Hill is a privately owned dam located in Rumsey, California, along the Tr Bear Creek. Built in 1952, this earth dam stands at a height of 38 feet and has a storage capacity of 245 acre-feet, primarily serving irrigation and water supply purposes. The dam is regulated by the California Department of Water Resources (DWR) and undergoes regular inspections to ensure its safety and functionality.

With a significant hazard potential, York Hill Dam has been assessed as being in satisfactory condition as of September 2017. The dam's emergency action plan (EAP) status and risk assessment measures are currently unspecified, highlighting the need for ongoing monitoring and preparedness. The San Francisco District of the US Army Corps of Engineers is not involved in the ownership, funding, or operations of the dam, emphasizing the private nature of its management.

Water resource and climate enthusiasts will find York Hill Dam to be a crucial piece of infrastructure in Colusa County, playing a vital role in water supply and irrigation for the local community. Its location, design, and regulatory oversight provide a fascinating case study in dam management and the intersection of human and natural systems in maintaining water resources. The ongoing monitoring and maintenance of York Hill Dam are essential in ensuring its continued safety and effectiveness in serving its intended purposes.