Jimmy Creek Reservoir, located in Union, Oregon, is a private irrigation reservoir completed in 1981 with a storage capacity of 675 acre-feet. The dam, primarily used for irrigation purposes, stands at a height of 42 feet and spans 265 feet in length, creating a surface area of 52.5 acres. The reservoir is situated on Jimmy Creek and is regulated by the Oregon Water Resources Department, with state permitting, inspection, and enforcement in place to ensure its safety and compliance.

With a significant hazard potential, Jimmy Creek Reservoir has a designated outlet gate system and a maximum discharge capacity of 1,858 cubic feet per second. The dam's emergency action plan status and condition assessment remain unreported, indicating a need for further evaluation and risk management measures. Despite its operational history and structural specifications, the reservoir's risk assessment and emergency preparedness aspects require attention to ensure the safety and security of the surrounding community and water resources in the event of a potential hazard or natural disaster.