Dry Muddy is a private earth dam located in the Big Muddy Oil Field in Natrona County, Wyoming. Completed in 1933 for irrigation purposes, the dam stands at 19 feet high with a hydraulic height of 14 feet and a length of 800 feet. Despite its age, the dam has a low hazard potential but is in poor condition, as noted during the last inspection in August 2021.

The dam has a normal storage capacity of 213 acre-feet and a maximum storage of 401 acre-feet, serving as a vital water resource for the area. Its spillway type is uncontrolled with a width of 25 feet, and it is equipped with a single valve outlet gate for water release. Although Dry Muddy Creek is the primary source of water for the dam, its drainage area is listed as zero, suggesting potential limitations on its water supply.

With a moderate risk assessment rating, it is crucial for the owner to address the poor condition of Dry Muddy dam to ensure its continued safety and functionality for irrigation purposes. Regular inspections and maintenance are essential to mitigate any potential risks and safeguard this valuable water resource in Wyoming.