Thye Dam, located in Adair, Iowa, was completed in 1968 by the USDA NRCS and serves multiple purposes including fire protection, stock, and small fish pond. The earth dam stands at a height of 43 feet and spans 535 feet in length, with a storage capacity of 307 acre-feet. Situated on Brush Creek in the Thompson River area, the dam is regulated by the Iowa DNR and undergoes regular inspections to ensure its structural integrity.

Despite being classified as having a low hazard potential, Thye Dam is considered to have a moderate risk level. The dam features an uncontrolled spillway and is surrounded by a surface area of 16 acres within a drainage area of 0.8 square miles. The dam's condition is currently not rated, but with state jurisdiction, permitting, inspection, and enforcement in place, the dam is well-maintained to mitigate any potential risks and ensure the safety of the surrounding community and environment. For water resource and climate enthusiasts, Thye Dam presents an interesting case study in dam construction and management within the state of Iowa.