Orville, also known as Lake Orville, is a privately owned dam located in Angwin, California. Built in 1959, this earth dam stands at a height of 28 feet and serves primarily for water supply purposes, with irrigation and recreation also being supported. The dam has a storage capacity of 89 acre-feet and is situated on Angwin Creek in Napa County.

Managed by the California Department of Water Resources (DWR), the Orville dam is regulated, permitted, inspected, and enforced by state agencies to ensure its safety and functionality. Despite being rated with a high hazard potential, the dam's condition assessment deemed it as satisfactory during the last evaluation in September 2017. The dam's emergency action plan status, risk assessment, and inundation maps are not publicly disclosed, indicating a need for further information on its emergency preparedness.

With its strategic location and critical role in water supply, Orville dam presents both opportunities and challenges for water resource and climate enthusiasts. As a key infrastructure in the region, monitoring its maintenance and safety protocols is crucial to prevent potential hazards and ensure the continuous availability of water for various purposes in the community.