Griener Dam, located in Keokuk, Iowa, on the TR-SKUNK RIVER, was completed in 1975 by the USDA NRCS and is primarily used for recreation. This earth dam stands at a height of 30 feet and has a length of 428 feet, providing a storage capacity of 40 acre-feet. The dam's surface area is 2.1 acres, with a drainage area of 0.17 square miles, making it a vital resource for fire protection, stock, and small fish pond purposes in addition to recreation.

Owned by a private entity, Griener Dam is regulated by the IOWA DNR and falls under the jurisdiction of the state. The dam has been assessed as having a low hazard potential and a moderate risk rating. While the condition is currently not rated, regular inspections, permitting, and enforcement by state agencies ensure the safety and functionality of the structure. With its picturesque location and important role in water resource management, Griener Dam is a valuable asset to the community for both recreational activities and environmental conservation efforts.