Jemima K is a privately-owned irrigation dam located in Payette River, Idaho. Built in 1974, this earth dam stands at 71.2 feet high, with a hydraulic height of 66.3 feet and a length of 2600 feet. With a storage capacity of 2650 acre-feet, it serves the primary purpose of irrigation for the surrounding area, covering a drainage area of 3.5 square miles.

Despite being in fair condition according to a 2017 assessment, Jemima K poses a significant hazard potential due to its uncontrolled spillway type and the risk of moderate flooding. The dam has experienced regular inspections every four years, with the last one conducted in May 2017. This dam is regulated by the Idaho Department of Water Resources and has state permits for operation, inspection, and enforcement.

Located in Valley County, Idaho, Jemima K plays a crucial role in water resource management for the region, ensuring a stable water supply for agricultural activities. Its design, construction, and operation are all in compliance with state regulations, highlighting the importance of proper infrastructure maintenance and risk management in the face of changing climate conditions.