Goellner Dam, located in Lineville, Iowa, is a private earth dam completed in 2019 for recreational purposes. Designed by Stephen Pedrick and French-Reneker and Associates, this dam stands at a height of 26 feet and spans a length of 658 feet, with a maximum storage capacity of 158 acre-feet. The dam's spillway is uncontrolled with a width of 10 feet, and it is categorized as having a low hazard potential and a moderate risk assessment.

Managed by the Iowa Department of Natural Resources, the Goellner Dam is situated in Wayne County and offers a surface area of 9.6 acres for outdoor enthusiasts to enjoy. While the dam has not been rated for its condition, it undergoes regular state inspections and enforcement to ensure its safety and compliance with regulations. With a drainage area of 0.5 square miles, the dam provides valuable water resources for the surrounding community while also serving as a recreational hotspot for visitors in the area.