Maars Dam, located in Cowley, Kansas, is a privately owned structure designed by Norman L. Roelfs, P.E. This earth dam on Grouse Creek serves multiple purposes, including fire protection, stock, and small fish pond. With a height of 25 feet and a length of 670 feet, the dam has a storage capacity of 298.3 acre-feet and a surface area of 16 acres. The dam is regulated by the Kansas Department of Agriculture and is inspected and enforced by the state.

Despite being classified as low hazard potential and not rated for condition assessment, Maars Dam plays a crucial role in water resource management in the area. The dam has a spillway width of 40 feet and a maximum discharge capacity of 1216 cubic feet per second. Although the last inspection was conducted in October 1991, the dam remains a key asset for water supply and protection in the region. The dam does not have outlet gates and is not managed by the US Army Corps of Engineers.

Overall, Maars Dam stands as an essential structure for fire protection, livestock, and aquatic life support in Cowley, Kansas. With its strategic location on Grouse Creek and its significant storage capacity, the dam serves as a vital resource for the local community. While the dam's condition assessment and emergency preparedness may need further evaluation and updates, its role in water resource management and climate resilience cannot be understated.