Csp Mule Creek is a state-owned offstream water supply dam located in Ione, California, completed in 1988. With a dam height of 51 feet and a hydraulic height of 47.2 feet, the primary purpose of this earth dam is to provide water supply for various uses including flood risk reduction, irrigation, and water supply. The dam has a storage capacity of 535 acre-feet and covers a surface area of 24 acres, serving the local community in Amador County.

Managed by the California Department of Water Resources (DWR) and Safety of Dams, Csp Mule Creek is regulated, permitted, inspected, and enforced by the state authorities. It has a high hazard potential but is assessed to be in satisfactory condition as of September 2017. The emergency action plan (EAP) for the dam was last revised in January 2021, ensuring that proper protocols are in place in case of any unforeseen events. With its critical role in providing water supply and mitigating flood risks, Csp Mule Creek stands as a vital infrastructure supporting the water resource management efforts in the region.