Grass Lake in Cass, Minnesota, is a Federal-owned Fish and Wildlife Pond managed by the USDA Forest Service. Built in 1970, this Earth dam stands at 5 feet tall and spans 350 feet in length, with a storage capacity of 135 acre-feet. The lake covers a surface area of 35 acres and serves as a vital habitat for local flora and fauna.

Despite its low hazard potential, Grass Lake has a moderate risk assessment rating, emphasizing the need for ongoing monitoring and risk management measures. While the dam's condition is currently not rated, regular inspections are conducted every 10 years to ensure its structural integrity. The outlet gates, spillway type, and emergency action plan status are not specified, highlighting areas for potential improvement in the future.

Located along the TR-Mississippi River, Grass Lake plays a crucial role in water resource management and conservation efforts in the region. Enthusiasts interested in climate resilience and the protection of aquatic ecosystems will find this picturesque lake a valuable case study in sustainable dam operation and maintenance practices.