Adams & Bunker #3, also known as Heart #2, is a privately owned irrigation dam located in Weld County, Colorado. Completed in 1906, this earth dam stands at a height of 16 feet and has a storage capacity of 520 acre-feet. Situated on Porter Creek, the dam serves the primary purpose of irrigation, with a drainage area of 133 square miles and a maximum discharge of 1100 cubic feet per second.

Despite its low hazard potential, the dam's condition assessment in 2016 was deemed unsatisfactory, reflecting the need for maintenance and improvements. The spillway, which is uncontrolled and 500 feet wide, plays a crucial role in managing water flow during high water events. The dam's risk assessment indicates a moderate level of risk, highlighting the importance of ongoing monitoring and risk management measures to ensure the safety and stability of the structure.

For water resource and climate enthusiasts, Adams & Bunker #3 serves as a noteworthy example of a historic irrigation dam in Colorado. With its unique design and significant storage capacity, this dam plays a vital role in supporting agricultural activities in the region. As efforts continue to assess and address the dam's condition and potential risks, it serves as a reminder of the importance of sustainable water management practices in the face of changing climate conditions.