Located in Appanoose County, Iowa, Sidles Dam is a private earth dam constructed in 1984 with a primary purpose of fire protection, stock, or small fish pond. Spanning 315 feet in length and standing at a height of 30 feet, the dam has a storage capacity of 37 acre-feet and a surface area of 3.1 acres. Situated on the TR-COOPER CR. river or stream, the dam is regulated by the Iowa Department of Natural Resources and is subject to state inspection and enforcement.

Despite being classified as a low hazard potential structure with a moderate risk assessment, Sidles Dam has not been rated for its condition. The dam features an uncontrolled spillway type and a soil foundation, with no associated locks or outlet gates. While the dam has not been modified in recent years and does not have an emergency action plan in place, it meets state permitting and regulatory requirements. Water resource and climate enthusiasts may find Sidles Dam an intriguing site for its unique design and purpose, as well as its location in the Rock Island District of Iowa.