Located in Jackson County, Colorado, Three Mile is a privately owned dam that serves multiple purposes including irrigation, fire protection, stock water, and small fish pond maintenance. Built in 1934, this earth dam stands at a height of 16 feet and spans 346 feet in length, with a storage capacity of 64 acre-feet. Three Mile Creek is the primary source of water for this dam, with a maximum discharge capacity of 137 cubic feet per second.

Managed by the Colorado Division of Water Resources, Three Mile is classified as a low hazard dam with fair condition assessment. The dam has a controlled spillway width of 10 feet and is subject to regular inspections, with the last one conducted in October 2016. Despite being privately owned, the state regulatory agency oversees permitting, inspection, and enforcement to ensure the safety and integrity of the structure.

Water resource and climate enthusiasts will appreciate Three Mile's contribution to local irrigation and ecosystem maintenance in the region. With a moderate risk assessment rating, efforts to enhance risk management measures and emergency preparedness are ongoing to ensure the continued operation and safety of this vital water resource infrastructure in Colorado.