Kolls Dam, located in Kellogg, Iowa, is a private dam designed by the USDA NRCS and regulated by the Iowa DNR. Built in 1959, this earth dam stands at a height of 29 feet and has a length of 419 feet, creating a reservoir with a storage capacity of 72 acre-feet. The dam primarily serves the purposes of fire protection, stock watering, and small fish pond recreation along the TR-ALLOWAY CREEK.

With a low hazard potential and a moderate risk assessment rating, Kolls Dam has not been inspected since November 1960 and is currently listed as "Not Rated" in terms of condition assessment. While it does not have any associated structures or outlet gates, it is equipped with an uncontrolled spillway. Despite its age, the dam continues to provide valuable water resources to the local community, emphasizing the importance of regular inspection and maintenance to ensure its continued safety and functionality in the face of changing climate conditions.