Round Barn Reservoir, located in Harney County, Oregon, is a privately owned water resource that serves primarily for irrigation purposes. The reservoir, completed in 1943, has a dam height of 12 feet and a storage capacity of 7500 acre-feet. With a surface area of 956 acres and a maximum discharge of 630 cubic feet per second, Round Barn Reservoir plays a crucial role in water management within the region.

The reservoir is situated on Riddle Creek and is regulated by the Oregon Water Resources Department (OWRD), with state permitting, inspection, and enforcement in place to ensure its safety and functionality. The dam type is classified as earth, with an uncontrolled spillway and slide gates for outlet control. Despite being rated as having a low hazard potential, the reservoir is subject to moderate risk assessment due to its age and potential vulnerabilities.

Round Barn Reservoir, with its strategic location and significant storage capacity, stands as a vital resource for sustaining agricultural operations in the area. As water resource and climate enthusiasts continue to monitor and manage the reservoir, efforts to enhance its safety and efficiency will be crucial in maintaining its role in supporting the local ecosystem and economy.