Thomas is a private water resource located in Montgomery County, Tennessee, specifically on the TRIBSULPHUR BRANCH. Built in 1984, this earth dam serves multiple purposes, including fire protection, stock, small fish pond, and recreation. With a hydraulic height of 21.1 feet and a structural height of 26.1 feet, this dam has a storage capacity of 82 acre-feet, with a normal storage level of 48 acre-feet.

Despite its low hazard potential, Thomas has a moderate risk assessment rating of 3. The dam has not been rated for its condition assessment, but it underwent its last inspection in May 2016 and is scheduled for inspections every 5 years. Although the dam has no outlet gates, it does have an uncontrolled spillway type. Overall, Thomas presents an interesting case study for water resource and climate enthusiasts due to its unique design, multiple purposes, and moderate risk assessment.