Ellgen #2 is a privately owned irrigation dam located in Moffat County, Colorado, near the city of Maybelle. Completed in 1949, this earth dam stands at a height of 15 feet and has a length of 620 feet, providing storage for 97 acre-feet of water. With a primary purpose of irrigation, the dam serves the Bell Rock Gulch-TR river or stream, with a drainage area of 2 square miles.

Despite its low hazard potential and satisfactory condition assessment, Ellgen #2 is regulated by the Colorado Division of Water Resources, which oversees its permitting, inspection, and enforcement. The dam features an uncontrolled spillway and moderate risk assessment, indicating the need for ongoing risk management measures. The last inspection in August 2016 deemed the structure to be in good condition, with a six-year inspection frequency in place to ensure its continued safety.

This historic dam plays a crucial role in water management in the region, showcasing the intersection of human infrastructure and natural resources. As a vital part of the local irrigation system, Ellgen #2 demonstrates the importance of responsible dam operation and maintenance in safeguarding water resources and adapting to the challenges of a changing climate.