Wasteney Dam, located in Union County, Iowa, was completed in 1977 and is owned and operated by a private entity. The dam, with a height of 24 feet and a length of 400 feet, serves multiple purposes including fire protection and as a water source for livestock or small fish ponds. It has a storage capacity of 51 acre-feet and covers a surface area of 3.6 acres, with a drainage area of 0.12 square miles. The dam is primarily made of earth and has a spillway type of uncontrolled, with a hazard potential rated as low.

Managed by the USDA NRCS, Wasteney Dam is regulated and inspected by the Iowa DNR, ensuring compliance with state permitting and enforcement regulations. The dam is located on TR-Grand Creek in the city of Knowlton and falls under the jurisdiction of the Rock Island District of the US Army Corps of Engineers. Despite being classified as having a moderate risk level, the condition assessment of Wasteney Dam is currently not rated, emphasizing the need for regular inspections and maintenance to ensure the safety and functionality of this important water resource infrastructure for the community.