Mormon Dam, located in Fairfield, Idaho, was completed in 1908 and serves as an essential water resource for the region. The dam, standing at a height of 27.1 feet and with a storage capacity of 19,280 acre-feet, regulates the flow of McKinney Creek and Camas Creek, providing irrigation water for agricultural purposes. Despite its age, the dam is in fair condition, with a high hazard potential due to its location and the significant amount of water it holds.

Owned privately, Mormon Dam is regulated by the Idaho Department of Water Resources, ensuring that it meets state inspection, permitting, and enforcement standards. The dam's spillway, which is uncontrolled, has a width of 28 feet and can handle a maximum discharge of 1250 cubic feet per second. The dam's structural components consist of stone core types supported by rock and soil foundations. The dam's emergency action plan is being continuously updated to meet guidelines and ensure public safety in case of a hazard event.

Mormon Dam plays a crucial role in water management in the area, with a surface area of 2440 acres and a drainage area of 60.8 square miles. The dam's moderate risk assessment indicates the need for ongoing risk management measures to mitigate potential hazards and ensure the safety and sustainability of the dam and surrounding communities. As a historic structure with significant importance for water resource management, Mormon Dam continues to be a focal point for water resource and climate enthusiasts interested in the intersection of infrastructure and environmental sustainability.