John Keller is a privately owned dam located in Weld County, Colorado, specifically in the city of Goodrich. Built in 1974, this earth dam stands at 19 feet tall and spans a length of 6321 feet, with a primary purpose of irrigation. It has a storage capacity of 154 acre-feet and serves the Boxelder Creek-TR watershed, with a low hazard potential and a high risk assessment rating of 2.

Despite not having a spillway, John Keller is equipped with outlet gates and has a maximum discharge capacity of 6770 cubic feet per second. The dam, which is regulated and inspected by the Colorado Division of Water Resources, is in a condition that has not been formally rated. With a drainage area of 2 square miles and a surface area of 17 acres, this dam plays a crucial role in managing water resources and supporting agricultural activities in the region.

Water resource and climate enthusiasts will find John Keller to be a noteworthy structure due to its historical significance and its contribution to irrigation in the area. Its location along Boxelder Creek-TR highlights its importance in managing water flow and storage, showcasing the vital role dams play in sustaining ecosystems and supporting agriculture. As a privately owned and state-regulated dam, John Keller represents a key piece of infrastructure that balances the needs of water users while also prioritizing safety and risk management in the face of changing climate conditions.