Washakie is a vital irrigation structure located in Fremont, Wyoming, specifically in Ft. Washakie. Owned and regulated by the Bureau of Indian Affairs, this earth dam was completed in 1935 and stands at a height of 43 feet, with a hydraulic height of 50 feet and a structural height of 62 feet. The dam spans a length of 1251 feet and has a storage capacity of 10,300 acre-feet, serving the primary purpose of irrigation and water supply for the region.

With a maximum discharge capability of 43,000 cubic feet per second, Washakie poses a high hazard potential and has a very high risk assessment rating. Despite the lack of available information on its condition assessment, the dam undergoes regular inspections every five years, with the last inspection conducted in August 2012. In the event of an emergency, the dam is equipped with an emergency action plan, though details on its preparedness and adherence to guidelines are currently not available.

Situated on the South Fork Little Wind River, Washakie plays a crucial role in water resource management in the area, providing vital irrigation support and water supply. As a significant federal structure, its operations and regulatory oversight fall under the purview of the Bureau of Indian Affairs, ensuring the safety and efficiency of its functions for the community it serves.