Shiloh Ranch in Sonoma, California, is a privately owned dam with a primary purpose of water supply. Completed in 1991, this earth dam stands at a height of 61.3 feet and has a storage capacity of 432 acre-feet. It is situated on the Tr Russian River, providing essential water resources for the surrounding area.

The dam at Shiloh Ranch is regulated by the California Department of Water Resources (DWR) under the Safety of Dams program, ensuring its structural integrity and safety. The last inspection in February 2020 deemed the dam to be in satisfactory condition with a high hazard potential. Despite this, the dam has not had an Emergency Action Plan (EAP) prepared, which is a critical component in ensuring proper response in case of emergencies.

With its picturesque location and vital role in water supply, Shiloh Ranch serves as a key feature in the landscape of Mark West. Enthusiasts of water resources and climate will find interest in the design and functionality of this dam, as well as the regulatory measures in place to ensure its continued operation and safety.