Gross Dam, located in Adair, Iowa, is a privately owned structure designed by SCS and completed in 1989. The dam serves multiple purposes, including fire protection and creating a small fish pond. With a height of 31 feet and a length of 450 feet, Gross Dam has a storage capacity of 45 acre-feet and covers a surface area of 2.8 acres. It is regulated by the Iowa Department of Natural Resources and is classified as having a low hazard potential.

Despite being primarily used for fire protection and stock purposes, Gross Dam also plays a role in managing water resources in the area. The dam is situated on the TR-Middle Nodaway River and is designed as an earth dam with a soil foundation. While it currently holds a moderate risk rating, the dam has not been inspected for condition assessment, and its emergency action plan status remains unknown. Overall, Gross Dam stands as a vital infrastructure component in the region's water resource management and climate resilience efforts.