Cornish Plains Reservoir, located in Weld County, Colorado, is a privately owned earth dam that was completed in 2007 for the primary purpose of irrigation. Managed by the Colorado Department of Water Resources, this reservoir has a maximum storage capacity of 4,870 acre-feet and a surface area of 308 acres. It is situated on the Crow Creek-TR stream and has a significant hazard potential due to its size and location.

The dam stands at a height of 21 feet and has a spillway width of 66 feet, ensuring controlled water release during periods of excess inflow. Despite its significant hazard potential, the dam's condition was assessed as satisfactory during the last inspection in August 2020. With a drainage area of 2 square miles, the reservoir plays a crucial role in providing water for irrigation in the surrounding agricultural areas. The overall risk assessment for Cornish Plains Reservoir is moderate, indicating the need for ongoing monitoring and maintenance to ensure its safety and functionality.

Overall, Cornish Plains Reservoir is a vital water resource for the Barnesville community, serving as a key source of irrigation water for local farms and agricultural activities. With its earth dam structure and controlled spillway, the reservoir provides essential water storage capacity while managing flood risks effectively. As a significant component of the local water infrastructure, ongoing inspections and risk management measures are essential to ensure the safety and reliability of this essential water resource in Colorado's agricultural heartland.