Egeria, located in Toponas, Colorado, is a privately owned earth dam built in 1902 for irrigation purposes on Egeria Creek-OS. The dam stands at a height of 21 feet with a hydraulic height of 20 feet and a length of 500 feet, providing a storage capacity of 243 acre-feet. It has a spillway width of 10 feet and a maximum discharge capacity of 100 cubic feet per second. Egeria underwent modifications in 1946 to enhance its hydraulic, mechanical, and structural components.

Despite being classified as having a low hazard potential, Egeria is in fair condition and undergoes inspections every six years. The dam has a moderate risk assessment level of 3, prompting the need for risk management measures to be implemented. The last inspection in October 2018 confirmed its stable condition, but ongoing monitoring and maintenance are essential to ensure the safety and efficiency of this vital water resource infrastructure in Routt County, Colorado. Water resource and climate enthusiasts can appreciate Egeria's historical significance in supporting agricultural irrigation while highlighting the importance of sustainable dam management practices in the face of changing environmental conditions.