Johnson #3 is a private earth dam located in Niobrara, Wyoming, specifically in the city of Edgemont S D. Built in 1944, this dam serves multiple purposes including fire protection, stock, and small fish pond. With a height of 22 feet and a storage capacity of 161 acre-feet, Johnson #3 is primarily regulated by the Wyoming State Engineer's Office and undergoes regular inspections to ensure its structural integrity.

Despite its low hazard potential, Johnson #3 has been assessed as being in poor condition as of May 2018. The dam features an uncontrolled spillway with a width of 70 feet and one uncontrolled outlet gate. Surrounding the dam is the Swede Draw river or stream, making it an essential water resource for the area. The risk assessment for Johnson #3 categorizes it as having a moderate risk level (3), prompting the need for continued monitoring and potential risk management measures.

Overall, Johnson #3 stands as a vital infrastructure for fire protection, livestock maintenance, and recreational fishing in the region. Its location in a congressional district in Wyoming, overseen by Liz Cheney (R), adds to its significance in water resource management and climate resilience efforts. As water enthusiasts and climate advocates, understanding the condition and management of dams like Johnson #3 is crucial for ensuring the safety and sustainability of water resources in the face of changing climate patterns.