Greiner Dam, located in Wapello County, Iowa, was completed in 1968 by the USDA NRCS and serves multiple purposes including fire protection and creating a small fish pond. This earth dam stands at a height of 21 feet and stretches 470 feet in length, with a storage capacity of 68-acre-feet and a surface area of 5 acres. The dam is regulated by the Iowa DNR and is inspected, permitted, and enforced by state authorities, ensuring its safety and compliance with environmental regulations.

With a low hazard potential and a moderate risk assessment rating, Greiner Dam plays a crucial role in managing water resources in the area. The dam is situated on TR-Buckeye Creek, providing a vital source of water for agricultural and recreational activities in the region. Owned privately, Greiner Dam is designed to withstand potential risks and emergencies, although its condition assessment is currently not rated. Despite this, the dam continues to be a reliable asset for the community, contributing to water conservation efforts and supporting local wildlife and ecosystems.