Wjs is a private irrigation dam located in Campbell, Wyoming, on the S. Prong Wild Horse river. Built in 2002 by designer Hugh Lowham, this earth dam stands at a height of 20 feet and has a storage capacity of 135 acre-feet. With a primary purpose of irrigation, Wjs also serves for fire protection, stock, and small fish pond purposes.

The dam has a spillway width of 200 feet and an uncontrolled spillway type. It has been deemed to have a low hazard potential and fair condition assessment. The last inspection in August 2020 indicated that the dam meets regulatory standards and is regularly monitored for any maintenance needs. Despite the moderate risk assessment, Wjs remains a crucial water resource infrastructure for the surrounding area.

Located on an unnamed ranch in Wyoming, Wjs plays a vital role in managing water resources in the region. With its strategic location and efficient design, this dam ensures a reliable water supply for irrigation and other essential purposes. For water resource and climate enthusiasts, Wjs serves as a prime example of sustainable water management practices in action.