Ellgen is a privately owned irrigation dam located in Moffat County, Colorado, along the Bell Rock Gulch. Completed in 1949, this earth dam stands at a height of 41 feet and has a length of 345 feet, providing a storage capacity of 171 acre-feet for irrigation purposes. With a low hazard potential and a satisfactory condition assessment as of August 2016, Ellgen is regulated and inspected by the Colorado Division of Water Resources to ensure its safe operation.

The dam features an uncontrolled spillway with a width of 60 feet, and a maximum discharge capacity of 517 cubic feet per second. Its location in a scenic area near Ouray, Utah, makes it a key water resource for the local agricultural community. Despite being privately owned, Ellgen is subject to state regulations, permitting, and inspection, highlighting its importance in maintaining water security and sustainability in the region.

Overall, Ellgen serves as a crucial water infrastructure for irrigation needs in Moffat County, Colorado. With its moderate risk assessment and regular inspections, this dam plays a vital role in supporting agricultural activities and water management along the Bell Rock Gulch. Its historical significance and functional design underscore the importance of responsible water resource management in the face of changing climate conditions.