Madonna is a privately owned dam located in Arvada, Wyoming, along the Clay Draw river. Completed in 1973, this earth dam stands at 29 feet tall with a structural height of 35 feet and a length of 125 feet. With a primary purpose of providing fire protection, stock, and a small fish pond, Madonna has a storage capacity of 60 acre-feet and a surface area of 4 acres.

Despite its low hazard potential, Madonna is currently in poor condition based on a 2020 assessment. The dam has an uncontrolled spillway and one outlet gate. While it is regulated and inspected by the State of Wyoming, the dam lacks an emergency action plan and updated contact information. The risk assessment for Madonna rates it as moderate, highlighting the need for improved risk management measures to ensure the safety and stability of the structure in the event of an emergency.

Water resource and climate enthusiasts interested in Madonna will find a unique site for fire protection and recreational purposes in the heart of Wyoming. With its historical significance and potential for improvement in risk management, Madonna serves as a reminder of the importance of maintaining and monitoring our water infrastructure to ensure the safety of surrounding communities and ecosystems.