Julesburg #3 is a privately owned earth dam located in Sedgwick, Colorado, specifically in the city of Dorsey. Built in 1910, this dam serves primarily for irrigation purposes, with a storage capacity of 38,600 acre-feet and a surface area of 1578 acres. It sits on Cottonwood Creek-TR and is under the jurisdiction of the Colorado Department of Water Resources, with state oversight for permitting, inspection, and enforcement.

Despite its age, Julesburg #3 has a high hazard potential and an unsatisfactory condition assessment as of October 2020. With a hydraulic height of 43 feet and a length of 2070 feet, the dam poses moderate risk, prompting the need for risk management measures. The dam features an uncontrolled spillway and has a maximum discharge capacity of 2572 cubic feet per second. Regular inspections are conducted to ensure public safety and effective emergency action plans are in place.

As an integral part of the local water resource infrastructure, Julesburg #3 plays a crucial role in supporting agriculture and recreation activities in the region. Its historical significance combined with its functional importance underscores the necessity of ongoing maintenance and monitoring to mitigate potential risks and ensure the long-term sustainability of this vital water management structure.