Droster, Elmer is a private dam located in Walworth, Wisconsin, along the TR-Sugar Creek. Constructed in 1965 by the USDA NRCS, it stands at a height of 28 feet and spans 520 feet in length. The primary purpose of the dam is for recreation, with a storage capacity of 40 acre-feet and a surface area of 4 acres. The dam is regulated by the WIDNR and is subject to state permitting, inspection, and enforcement.

Despite being classified as having a low hazard potential, Droster, Elmer is considered to have a moderate risk level, with a risk assessment rating of 3. The dam's condition is currently not rated, with the last inspection conducted in September 2010. While an Emergency Action Plan (EAP) has been prepared, it has not been updated since 2006. The dam's spillway type is uncontrolled, and it has a maximum discharge capacity of 180 cubic feet per second.

For water resource and climate enthusiasts, Droster, Elmer serves as a notable structure in the region, offering recreational opportunities while also posing a moderate risk that should be monitored and managed effectively to ensure the safety of the surrounding community and ecosystem.