Grasmere North Dam, located in Owyhee, Idaho, is a privately owned earth dam that was completed in 1936. Sitting at a height of 22.4 feet and with a storage capacity of 657.8 acre-feet, this dam serves as a key structure for the Rattlesnake Creek and Marys Creek watersheds. Despite its significant hazard potential and poor condition assessment, the dam has been inspected regularly, with the last assessment conducted in August 2020.

The dam's primary purpose is classified as 'Other', and it is primarily used for water resource management in the region. With a surface area of 86.1 acres and a drainage area of 1.3 square miles, Grasmere North Dam plays a crucial role in controlling the flow of water and ensuring the safety of downstream areas. Although there have been no modifications to the dam over the years, its spillway type is listed as uncontrolled, with a maximum discharge capacity of 55 cubic feet per second.

With its location in a region vulnerable to climate variability and changing water patterns, Grasmere North Dam stands as a symbol of both the challenges and opportunities in water resource management. As enthusiasts in water resources and climate, understanding the intricacies of this dam's design, purpose, and condition can shed light on the importance of sustainable infrastructure and proactive risk management in the face of a changing climate.