South Ricketts Flat is a private irrigation dam located in Johnson, Wyoming, along the Ricketts Flat Creek. Built in 1972, this earth dam stands at a height of 48 feet and has a storage capacity of 359 acre-feet. With a surface area of 20.45 acres and a drainage area of 3.15 square miles, the dam serves multiple purposes including irrigation, fire protection, stock water, and fish and wildlife habitat.

Despite being classified as having a low hazard potential and fair condition assessment, South Ricketts Flat poses a moderate risk level due to its location and design. The dam features an uncontrolled spillway with a width of 150 feet and an outlet valve for water release. Regular inspections are conducted, with the last assessment taking place in August 2021, ensuring the safety and functionality of the structure. While no emergency action plan is currently in place, the dam meets state regulatory requirements for permitting, inspection, and enforcement.

Water resource and climate enthusiasts will appreciate the strategic location of South Ricketts Flat, serving as a vital resource for agricultural irrigation and wildlife conservation in the region. With its historical significance dating back to the early 1970s, this dam continues to play a crucial role in managing water resources and supporting local ecosystems. As efforts continue to enhance its risk management measures and emergency preparedness, South Ricketts Flat stands as a testament to sustainable water management practices in Wyoming.