Trotter Dam, located in Lynnville, Iowa, is a private-owned structure that serves multiple purposes including fire protection, stock, and small fish pond, but its primary purpose is for recreation. Completed in 1971, this earth dam stands at a height of 31 feet and has a length of 635 feet, creating a reservoir with a storage capacity of 376 acre-feet. The dam is situated on the TR-North Skunk River and is regulated by the Iowa Department of Natural Resources, ensuring that it meets state inspection and enforcement standards.

With a surface area of 21.9 acres and a drainage area of 0.95 square miles, Trotter Dam provides a tranquil setting for outdoor activities such as fishing, boating, and wildlife observation. Despite its low hazard potential and moderate risk assessment, the dam's condition has not been rated, and its emergency action plan status remains unclear. The dam features an uncontrolled spillway and does not have outlet gates, locks, or associated structures, emphasizing its simple yet effective design for water resource management and recreational use in Jasper County, Iowa.