Arch Slough, also known as Matt Arch, is a public utility located in Cedaredge, Colorado, and is regulated by the Department of Water Resources. Built in 1888, this earth dam stands at a height of 15 feet and serves primarily for irrigation purposes along Ward Creek. With a storage capacity of 108 acre-feet, the dam has a low hazard potential and is considered to be in satisfactory condition.

The dam's spillway type is classified as 'None', and it features slide gates and uncontrolled outlets. Its inspection frequency is every 6 years, with the last inspection conducted in July 2020. The risk assessment for Arch Slough is deemed high, with a risk level of 2. While inundation maps and emergency action plans are not currently prepared for the dam, it continues to provide essential water resource management for the surrounding area.

Overall, Arch Slough plays a crucial role in the irrigation infrastructure of Delta County, Colorado, showcasing a historical importance dating back over a century. As water resource and climate enthusiasts, understanding the intricacies of this earth dam serves as a reminder of the ongoing efforts to manage and maintain vital water resources in the face of changing environmental conditions.