Box Elder #2 is a privately owned dam located in Larimer County, Colorado, specifically in the city of Wellington. Built in 1885, this earth dam stands at a height of 13 feet and spans a length of 1100 feet along the Box Elder Creek. Its primary purpose is for irrigation, with a storage capacity of 166 acre-feet and a normal storage level of 106 acre-feet. Despite its low hazard potential, the dam's condition assessment in 2013 was deemed unsatisfactory, indicating a need for maintenance and improvement.

The dam's spillway type is uncontrolled, with a width of 27 feet, and it is inspected every 6 years to assess its safety and integrity. The risk assessment for Box Elder #2 categorizes it as having a moderate risk level (3), highlighting the importance of ongoing risk management measures and potential safety concerns. With a history dating back over a century, this dam plays a crucial role in the local irrigation system and water resource management within the region, making it a key point of interest for water resource and climate enthusiasts interested in the intersection of infrastructure and environmental sustainability in Colorado.