Anderson #1 is a significant earth dam located on Kannah Creek in Mesa County, Colorado. Completed in 1963, this dam serves as a crucial water supply structure for the city of Grand Junction. With a height of 26 feet and a storage capacity of 821 acre-feet, Anderson #1 plays a key role in regulating the flow of water in the region.

Maintained and regulated by the Colorado Division of Water Resources, Anderson #1 has been assessed to be in fair condition as of August 2019. Despite its significant hazard potential, the dam has been deemed to meet safety guidelines, with emergency action plans in place. The dam's inspection frequency is set at every two years, ensuring ongoing monitoring and maintenance to mitigate risks and ensure the safety of the surrounding community.

With a high risk assessment rating, Anderson #1 is a critical piece of infrastructure for water management in the area. Its location on Kannah Creek and its role in supplying water to Grand Junction highlight the importance of ongoing monitoring and maintenance to safeguard against potential hazards and ensure the continued reliable operation of this essential water resource structure.