South Wall is a privately-owned irrigation dam located in Natrona, Wyoming, along the School Sec Spring Gulch. Built in 1912, this Earth dam stands at a height of 36 feet and has a storage capacity of 320 acre-feet, primarily used for irrigation purposes. The dam has a low hazard potential and is rated in fair condition as of the last inspection in May 2021.

Despite its age, South Wall continues to play a crucial role in water resource management in the region, providing water for agricultural activities and sustaining the local ecosystem. The dam is regulated by the Wyoming State Engineer's Office and undergoes regular inspections to ensure its safety and functionality. With a moderate risk assessment level of 3, the dam is equipped with a valve outlet gate and an uncontrolled spillway with a width of 50 feet.

South Wall serves as a reminder of the importance of maintaining and monitoring aging infrastructure to mitigate potential risks and ensure the continued availability of water resources in a changing climate. As water resource and climate enthusiasts, understanding the role of structures like South Wall in managing water supply and irrigation is vital to safeguarding our environment and communities for future generations.