Case is a privately-owned irrigation dam located in Johnson, Wyoming, along the Seventy-Six Draw river. Built in 1991 by designer Charles K. Wolz, this earth dam stands at a height of 30 feet and has a storage capacity of 349 acre-feet. With a normal storage level of 199 acre-feet, the dam covers a surface area of 29 acres and serves the primary purpose of irrigation in the region.

Despite its low hazard potential, the dam's condition assessment is rated as poor, indicating a need for maintenance and repair. The last inspection conducted in June 2021 revealed the dam's deteriorating state, prompting concern for its structural integrity. While the risk assessment categorizes the dam as moderate, it highlights the importance of implementing risk management measures to ensure the safety and reliability of the structure in the face of potential climate-related challenges. Enthusiasts of water resources and climate resilience will find Case to be a compelling case study in the ongoing efforts to protect and manage vital water infrastructure in the changing environmental landscape.