Tom J Dike, located in Valley, Idaho, is a private irrigation structure regulated by the Idaho Department of Water Resources. Completed in 1995, this earth dam on Beaver Creek North Fork Payette River stands at a height of 26.7 meters and has a hydraulic height of 22 meters, providing a storage capacity of 107 acre-feet for irrigation purposes. The dam, constructed with stone cores and rock and soil foundations, covers a surface area of 122 acres and serves a drainage area of 7.2 square miles, with a spillway width of 150 feet.

With a significant hazard potential and a fair condition assessment as of May 2017, Tom J Dike undergoes inspections every 4 years to ensure its structural integrity and safety. The dam lacks outlet gates and spillways, posing challenges in managing water discharge during high flow events. Despite its high risk assessment and the absence of emergency action plans, the dam continues to support agricultural activities in the region, highlighting the importance of ongoing monitoring and maintenance to mitigate potential risks associated with its operation. For water resource and climate enthusiasts, Tom J Dike serves as a case study in the management of private irrigation infrastructure in a regulated state jurisdiction.