Monarch Lake, located in Grand County, Colorado, is a federally-owned recreational water body that serves as a fish and wildlife pond. Managed by the USDA Forest Service, this Earth-type dam was completed in 1929 and stands at a height of 18 feet, with a storage capacity of 2000 acre-feet. The dam holds back Arapaho Creek, providing a serene setting for outdoor enthusiasts to enjoy activities such as fishing and boating.

With a drainage area of 47 square miles and a maximum discharge of 3300 cubic feet per second, Monarch Lake has a high hazard potential but is currently rated as "Not Rated" in terms of condition assessment. Despite its age, the dam has not been modified in recent years, raising some concerns about its maintenance and potential risks. While the dam is uncontrolled, the Forest Service conducts regular inspections to ensure its safety and manage any potential emergencies.

In the event of a dam failure, there are no specific emergency action plans in place, highlighting the need for improved risk management measures. Despite these concerns, Monarch Lake remains a popular destination for outdoor recreation, attracting visitors from near and far to enjoy its scenic beauty and abundant wildlife.