Julesburg #1a, located in Logan, Colorado, is a privately owned earth dam completed in 1910 for irrigation purposes on Cottonwood Creek. With a height of 18 feet and a length of 735 feet, it has a storage capacity of 38,600 acre-feet and serves a drainage area of 6 square miles. The dam has a high hazard potential and was assessed as unsatisfactory during its last inspection in October 2020.

Despite its age, Julesburg #1a continues to play a crucial role in the region's water resource management, providing essential irrigation water to support agricultural activities. The dam's moderate risk assessment underscores the importance of ongoing maintenance and monitoring to ensure its structural integrity and safety. With state regulation, inspection, and enforcement in place, the dam is subject to regular assessments to mitigate potential risks and protect downstream communities in the event of an emergency.

As a key component of the local infrastructure, Julesburg #1a highlights the intersection of water resource management and climate resilience. Its historical significance and ongoing operation serve as a reminder of the critical role that dams play in sustaining water supplies for agriculture and recreation in the face of changing climate conditions. Through proactive risk management measures and adherence to regulatory guidelines, Julesburg #1a continues to contribute to the sustainable utilization of water resources in the region.