Miller is a private water structure located in Johnson, Wyoming, specifically in the city of Arvada. Built in 1955, this Earth dam on Miller Draw serves multiple purposes including fire protection, stock, and small fish pond. With a dam height of 47 feet and a hydraulic height of 42 feet, Miller has a low hazard potential and is rated as having poor condition based on a 2019 assessment. Despite its condition, the dam still provides a normal storage capacity of 29 acre-feet and covers a surface area of 2 acres.

Although Miller's inspection frequency is every 5 years, the last inspection took place in July 2019. The dam is regulated by the State of Wyoming and is subject to state permitting, inspection, and enforcement. The spillway, which is uncontrolled, has a width of 50 feet. While the risk assessment categorizes Miller as having a moderate risk level, it is important to note that there are no associated structures with this dam. Overall, Miller serves as a critical resource for fire protection and livestock in the area, but its condition and risk level warrant continued monitoring and potential maintenance efforts to ensure its long-term functionality and safety.