Thompson No 2 is a privately-owned irrigation structure located in Idaho, specifically in Clearwater County. Completed in 1970, this earth dam stands at a height of 18.5 feet and has a storage capacity of 14.6 acre-feet, serving the primary purpose of irrigation. The dam is built with a core of stone and rests on rock and soil foundations, with a surface area of 2.25 acres and a drainage area of 0.1 square miles.

With a significant hazard potential and fair condition assessment, Thompson No 2 is regulated by the Idaho Department of Water Resources. The dam's spillway type is uncontrolled, with a maximum discharge of 1 cubic foot per second. Despite its moderate risk assessment rating, the dam has not undergone any significant modifications since its completion. The last inspection in October 2016 revealed a fair condition, indicating the need for continued monitoring and maintenance of this vital water resource structure in the region.

For water resource and climate enthusiasts, Thompson No 2 offers a fascinating glimpse into the intricate infrastructure supporting irrigation in Idaho. As a crucial component of the local water management system, this dam plays a vital role in ensuring efficient water distribution for agricultural purposes. With its strategic location on the Spring Clearwater River, Thompson No 2 stands as a testament to the ingenuity and engineering prowess involved in harnessing water resources for sustainable development in the region.