Morrison Dam, also known as Morrison Reservoir, is a historic gravity dam located in Malheur, Oregon, built in 1911 by the Bureau of Land Management for water supply purposes. With a height of 38 feet and a length of 425 feet, the dam holds a maximum storage capacity of 115 acre-feet and covers a surface area of 15.5 acres. It is situated on the South Fork of Little Willow Creek, contributing to the irrigation of the surrounding farm and ranch lands.

Despite its low hazard potential, Morrison Dam is in a poor condition according to the latest assessment in 2020, indicating a need for maintenance and repairs to ensure its continued functionality. The dam has not been modified in recent years and lacks certain emergency preparedness measures such as an Emergency Action Plan (EAP) and updated inundation maps. However, with a regular inspection frequency of 5 years, the Bureau of Land Management is actively monitoring the dam's integrity and safety to mitigate any potential risks.

As an integral water resource infrastructure in the region, Morrison Dam serves as a critical component of the local water supply system. With its historical significance and continued operational importance, efforts to maintain and enhance the dam's condition are essential for ensuring sustainable water management and climate resilience in the area.