Miller No. 1 is a privately owned earth dam located in Chugwater, Wyoming, along the North Chugwater Creek. Built in 1949 for irrigation purposes, this dam stands at 33 feet tall with a hydraulic height of 30 feet and a structural height of 34 feet. It has a capacity of 56 acre-feet of water storage and covers a surface area of 4 acres. Despite its low hazard potential, the dam is currently in poor condition and was last inspected in June 2021.

Operated by the SEO regulatory agency in Wyoming, Miller No. 1 has a spillway width of 40 feet and one outlet gate valve. While it has not been modified in recent years, the dam is subject to regular inspections every five years to ensure its structural integrity and safety. The risk assessment for this dam is considered moderate, with no emergency action plan currently in place. In the event of any potential risks or hazards, it is crucial for stakeholders to take proactive measures to mitigate any potential threats to the surrounding community and environment.