Moose-Willow 1, located in Aitkin, Minnesota, is a state-regulated fish and wildlife pond built in 1960 with a primary purpose of supporting fish and wildlife habitats. This Earth dam, with a height of 12 feet and a length of 500 feet, has a maximum storage capacity of 750 acre-feet and a normal storage capacity of 450 acre-feet. The dam also serves as a controlled spillway with a low hazard potential and satisfactory condition assessment.

Managed by the Minnesota Department of Natural Resources (MNDNR EWR), Moose-Willow 1 plays a crucial role in maintaining the ecological balance in the area. With a drainage area of 6.8 square miles and a surface area of 100 acres, this dam provides essential water resources for the surrounding environment, ensuring the conservation of the Moose River ecosystem. Despite its very high risk assessment rating, the dam has undergone regular inspections and enforcement measures to ensure its structural integrity and operational efficiency.

As a key component in the water resource management infrastructure of Minnesota, Moose-Willow 1 stands as a testament to the state's commitment to preserving its natural habitats and supporting biodiversity. With its strategic location and functional design, this dam exemplifies the balance between human development and environmental stewardship, making it a valuable asset for both wildlife enthusiasts and climate advocates alike.