Located in Garfield County, Colorado, Crescent Lake #2, also known as Mackinaw Lake, is a privately owned earth dam constructed in 1940 primarily for irrigation purposes. With a height of 9 feet and a length of 305 feet, this dam has a storage capacity of 213 acre-feet and serves as a crucial water resource for the surrounding area. The dam is regulated by the Colorado Department of Water Resources, ensuring proper inspection, permitting, and enforcement to maintain its integrity.

Not only does Crescent Lake #2 provide irrigation water, but it also offers recreational opportunities for visitors to enjoy its 12-acre surface area. Despite having a low hazard potential and moderate risk assessment, the dam has not been rated for its condition as of the last inspection in July 1986. While emergency action plans and risk management measures are not currently in place, the dam's location on the South Fork Derby Creek adds to its importance in the local water resource management system.

As climate change continues to impact water resources, Crescent Lake #2 stands as a vital infrastructure for both agricultural and recreational purposes in the region. With its historical significance dating back to the mid-20th century, efforts to ensure the dam's safety and sustainability will be essential in the face of evolving environmental challenges.