The Washington Memorial, located in Sundance, Wyoming, is a vital irrigation structure on the Sundance Creek. Constructed in 1987, this earth dam stands at 24 feet high and has a hydraulic height of 18 feet, serving its primary purpose of facilitating irrigation in the region. With a storage capacity of 31 acre-feet and a drainage area of 13.2 square miles, the dam plays a crucial role in water resource management in Crook County.

Owned by the local government and regulated by the State Engineering Office, the Washington Memorial has a spillway width of 40 feet and an uncontrolled spillway type. Despite being classified as having a high hazard potential, the dam is in fair condition as of the last assessment in July 2019. Emergency action plans are in place, with inspections conducted every five years to ensure the safety and integrity of the structure. With Liz Cheney representing the Congressional District 00, Wyoming, the Washington Memorial stands as a testament to the importance of water management in sustaining agricultural activities in the region.