Full Moon, located in Campbell, Wyoming, is a privately owned earth dam with a primary purpose of irrigation. Built in 1945 by designer Hugh Lowham, this dam stands at a height of 20 feet and has a maximum storage capacity of 155 acre-feet. With a surface area of 13.77 acres and a drainage area of 0.81 square miles, Full Moon serves the Reynolds Draw stream for irrigation, fire protection, stock, and small fish pond purposes.

Despite its low hazard potential and fair condition assessment, Full Moon has a moderate risk rating of 3. The dam features an uncontrolled spillway with a width of 50 feet and a valve outlet gate. With a history of inspection and maintenance, Full Moon is equipped to handle a maximum discharge of 1782 cubic feet per second. For water resource and climate enthusiasts, Full Moon offers a glimpse into the intersection of human infrastructure and natural ecosystems in managing water resources for agricultural and ecological needs in Wyoming.